./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/tree_max.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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:34:27,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:34:27,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:34:27,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:34:27,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:34:27,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:34:27,505 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:34:27,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:34:27,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:34:27,509 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:34:27,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:34:27,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:34:27,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:34:27,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:34:27,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:34:27,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:34:27,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:34:27,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:34:27,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:34:27,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:34:27,520 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:34:27,521 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:34:27,522 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:34:27,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:34:27,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:34:27,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:34:27,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:34:27,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:34:27,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:34:27,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:34:27,529 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:34:27,529 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:34:27,530 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:34:27,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:34:27,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:34:27,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:34:27,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:34:27,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:34:27,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:34:27,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:34:27,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:34:27,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:34:27,540 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:34:27,553 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:34:27,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:34:27,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:34:27,556 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:34:27,557 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:34:27,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:34:27,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:34:27,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:34:27,558 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:34:27,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:34:27,559 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:34:27,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:34:27,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:34:27,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:34:27,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:34:27,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:34:27,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:34:27,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:34:27,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:34:27,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:34:27,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:34:27,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:34:27,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:34:27,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:34:27,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:34:27,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:34:27,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:34:27,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:34:27,564 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2022-07-19 17:34:27,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:34:27,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:34:27,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:34:27,820 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:34:27,820 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:34:27,821 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2022-07-19 17:34:27,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54ab6516/be8286d7427b4ec8947faf0c52a5925b/FLAGbd74e6ce8 [2022-07-19 17:34:28,206 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:34:28,207 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2022-07-19 17:34:28,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54ab6516/be8286d7427b4ec8947faf0c52a5925b/FLAGbd74e6ce8 [2022-07-19 17:34:28,612 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f54ab6516/be8286d7427b4ec8947faf0c52a5925b [2022-07-19 17:34:28,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:34:28,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:34:28,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:34:28,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:34:28,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:34:28,620 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d685d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28, skipping insertion in model container [2022-07-19 17:34:28,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:34:28,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:34:28,753 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/verifythis/tree_max.c[544,557] [2022-07-19 17:34:28,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:34:28,780 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:34:28,795 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/verifythis/tree_max.c[544,557] [2022-07-19 17:34:28,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:34:28,814 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:34:28,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28 WrapperNode [2022-07-19 17:34:28,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:34:28,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:34:28,816 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:34:28,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:34:28,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,849 INFO L137 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2022-07-19 17:34:28,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:34:28,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:34:28,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:34:28,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:34:28,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:34:28,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:34:28,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:34:28,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:34:28,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (1/1) ... [2022-07-19 17:34:28,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:34:28,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:34:28,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 17:34:28,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 17:34:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 17:34:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:34:28,980 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-07-19 17:34:28,981 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2022-07-19 17:34:28,981 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-07-19 17:34:28,981 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 17:34:28,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 17:34:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:34:28,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:34:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 17:34:29,066 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:34:29,079 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:34:29,251 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:34:29,257 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:34:29,260 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:34:29,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:34:29 BoogieIcfgContainer [2022-07-19 17:34:29,262 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:34:29,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:34:29,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:34:29,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:34:29,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:34:28" (1/3) ... [2022-07-19 17:34:29,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f8f117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:34:29, skipping insertion in model container [2022-07-19 17:34:29,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:34:28" (2/3) ... [2022-07-19 17:34:29,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38f8f117 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:34:29, skipping insertion in model container [2022-07-19 17:34:29,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:34:29" (3/3) ... [2022-07-19 17:34:29,283 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2022-07-19 17:34:29,293 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:34:29,293 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:34:29,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:34:29,330 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@316dc112, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2d5b1899 [2022-07-19 17:34:29,331 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:34:29,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 17:34:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 17:34:29,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:34:29,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:34:29,343 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:34:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:34:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2022-07-19 17:34:29,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:34:29,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982002173] [2022-07-19 17:34:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:29,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:34:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:29,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 17:34:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 17:34:29,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:34:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982002173] [2022-07-19 17:34:29,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982002173] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:34:29,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:34:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 17:34:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640265797] [2022-07-19 17:34:29,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:34:29,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 17:34:29,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:34:29,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 17:34:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 17:34:29,609 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:34:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:34:29,890 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2022-07-19 17:34:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 17:34:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 17:34:29,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:34:29,898 INFO L225 Difference]: With dead ends: 74 [2022-07-19 17:34:29,898 INFO L226 Difference]: Without dead ends: 35 [2022-07-19 17:34:29,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:34:29,902 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:34:29,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 119 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:34:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-19 17:34:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-19 17:34:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-19 17:34:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-07-19 17:34:29,927 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2022-07-19 17:34:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:34:29,927 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-07-19 17:34:29,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:34:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-07-19 17:34:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 17:34:29,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:34:29,929 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:34:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:34:29,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:34:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:34:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2022-07-19 17:34:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:34:29,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121549213] [2022-07-19 17:34:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:29,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:34:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:29,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:30,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:34:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:34:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 17:34:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 17:34:30,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:34:30,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121549213] [2022-07-19 17:34:30,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121549213] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:34:30,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:34:30,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 17:34:30,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382605781] [2022-07-19 17:34:30,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:34:30,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 17:34:30,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:34:30,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 17:34:30,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:34:30,128 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 17:34:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:34:30,278 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-07-19 17:34:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 17:34:30,278 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-07-19 17:34:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:34:30,279 INFO L225 Difference]: With dead ends: 48 [2022-07-19 17:34:30,280 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 17:34:30,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:34:30,281 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:34:30,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 108 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:34:30,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 17:34:30,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-19 17:34:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-19 17:34:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-19 17:34:30,287 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2022-07-19 17:34:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:34:30,288 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-19 17:34:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 17:34:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-19 17:34:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 17:34:30,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:34:30,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:34:30,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 17:34:30,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:34:30,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:34:30,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2022-07-19 17:34:30,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:34:30,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333922088] [2022-07-19 17:34:30,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:30,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:34:30,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:34:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:34:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 17:34:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:34:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:34:30,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:34:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333922088] [2022-07-19 17:34:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333922088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:34:30,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37636266] [2022-07-19 17:34:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:30,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:34:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:34:30,456 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:34:30,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 17:34:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:30,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 17:34:30,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:34:30,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:34:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 17:34:30,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:34:30,900 INFO L356 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-07-19 17:34:30,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:34:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:34:30,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37636266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:34:30,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:34:30,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2022-07-19 17:34:30,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264683002] [2022-07-19 17:34:30,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:34:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 17:34:30,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:34:30,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 17:34:30,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2022-07-19 17:34:30,925 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 17:34:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:34:31,309 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-19 17:34:31,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 17:34:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-07-19 17:34:31,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:34:31,311 INFO L225 Difference]: With dead ends: 46 [2022-07-19 17:34:31,311 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 17:34:31,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 17:34:31,312 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:34:31,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 164 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:34:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 17:34:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2022-07-19 17:34:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-07-19 17:34:31,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-19 17:34:31,318 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2022-07-19 17:34:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:34:31,318 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-19 17:34:31,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-19 17:34:31,318 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-19 17:34:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 17:34:31,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:34:31,320 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:34:31,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 17:34:31,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:34:31,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:34:31,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:34:31,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2022-07-19 17:34:31,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:34:31,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748093002] [2022-07-19 17:34:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:31,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:34:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:34:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:34:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 17:34:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:34:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 17:34:31,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:34:31,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748093002] [2022-07-19 17:34:31,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748093002] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:34:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455936922] [2022-07-19 17:34:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:31,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:34:31,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:34:31,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:34:31,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 17:34:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-19 17:34:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:34:32,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:34:32,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:34:32,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:34:32,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:34:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:34:32,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:34:40,569 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:46,667 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:34:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 17:34:46,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455936922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:34:46,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:34:46,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2022-07-19 17:34:46,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683147186] [2022-07-19 17:34:46,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:34:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 17:34:46,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:34:46,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 17:34:46,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2022-07-19 17:34:46,794 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-19 17:34:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:34:47,707 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-07-19 17:34:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 17:34:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2022-07-19 17:34:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:34:47,709 INFO L225 Difference]: With dead ends: 76 [2022-07-19 17:34:47,709 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 17:34:47,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 17:34:47,710 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:34:47,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 335 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 914 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-07-19 17:34:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 17:34:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-19 17:34:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.225) internal successors, (49), 42 states have internal predecessors, (49), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (16), 9 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 17:34:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-07-19 17:34:47,727 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 47 [2022-07-19 17:34:47,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:34:47,729 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-07-19 17:34:47,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-07-19 17:34:47,729 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-07-19 17:34:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 17:34:47,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:34:47,734 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:34:47,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 17:34:47,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 17:34:47,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:34:47,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:34:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2022-07-19 17:34:47,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:34:47,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233011305] [2022-07-19 17:34:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:47,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:34:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:34:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:34:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 17:34:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:34:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:34:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:34:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:34:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233011305] [2022-07-19 17:34:48,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233011305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:34:48,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543593826] [2022-07-19 17:34:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:34:48,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:34:48,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:34:48,196 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) [2022-07-19 17:34:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 17:34:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:34:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-19 17:34:48,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:34:48,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:34:48,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:34:48,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:34:48,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:34:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 17:34:48,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:34:56,797 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:35:02,874 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:35:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 17:35:02,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543593826] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:35:02,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:35:02,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2022-07-19 17:35:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060762422] [2022-07-19 17:35:02,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 17:35:02,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 17:35:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2022-07-19 17:35:02,969 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-19 17:35:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:03,741 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2022-07-19 17:35:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 17:35:03,741 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2022-07-19 17:35:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:03,745 INFO L225 Difference]: With dead ends: 152 [2022-07-19 17:35:03,745 INFO L226 Difference]: Without dead ends: 90 [2022-07-19 17:35:03,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 17:35:03,748 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 131 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:03,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 222 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 788 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-07-19 17:35:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-19 17:35:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2022-07-19 17:35:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 15 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (32), 15 states have call predecessors, (32), 10 states have call successors, (32) [2022-07-19 17:35:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2022-07-19 17:35:03,762 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 47 [2022-07-19 17:35:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:03,762 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2022-07-19 17:35:03,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-07-19 17:35:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2022-07-19 17:35:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:35:03,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:03,765 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:03,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 17:35:03,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:03,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:03,983 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2022-07-19 17:35:03,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:03,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245356534] [2022-07-19 17:35:03,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:03,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:04,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 17:35:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245356534] [2022-07-19 17:35:04,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245356534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591929925] [2022-07-19 17:35:04,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:35:04,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:04,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:04,655 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) [2022-07-19 17:35:04,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 17:35:04,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:35:04,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:04,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 17:35:04,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:05,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-19 17:35:05,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-19 17:35:05,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-19 17:35:05,500 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 17:35:05,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:06,172 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:35:06,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-07-19 17:35:06,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591929925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:06,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:06,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2022-07-19 17:35:06,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034996976] [2022-07-19 17:35:06,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:06,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 17:35:06,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 17:35:06,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 17:35:06,385 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:08,828 INFO L93 Difference]: Finished difference Result 163 states and 287 transitions. [2022-07-19 17:35:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 17:35:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2022-07-19 17:35:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:08,833 INFO L225 Difference]: With dead ends: 163 [2022-07-19 17:35:08,833 INFO L226 Difference]: Without dead ends: 161 [2022-07-19 17:35:08,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2022-07-19 17:35:08,835 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 163 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 2167 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:08,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 384 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2167 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:35:08,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-19 17:35:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-07-19 17:35:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 96 states have (on average 1.21875) internal successors, (117), 98 states have internal predecessors, (117), 20 states have call successors, (20), 11 states have call predecessors, (20), 17 states have return successors, (86), 24 states have call predecessors, (86), 12 states have call successors, (86) [2022-07-19 17:35:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 223 transitions. [2022-07-19 17:35:08,867 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 223 transitions. Word has length 70 [2022-07-19 17:35:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:08,868 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 223 transitions. [2022-07-19 17:35:08,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 223 transitions. [2022-07-19 17:35:08,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 17:35:08,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:08,872 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:08,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:09,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2022-07-19 17:35:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:09,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315907396] [2022-07-19 17:35:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:09,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:09,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 17:35:09,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315907396] [2022-07-19 17:35:09,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315907396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:09,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72290628] [2022-07-19 17:35:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:09,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:09,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:09,784 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) [2022-07-19 17:35:09,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 17:35:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:09,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-19 17:35:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:10,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-07-19 17:35:10,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-19 17:35:10,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-19 17:35:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 17:35:10,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:11,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:35:11,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2022-07-19 17:35:11,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72290628] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:11,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:11,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2022-07-19 17:35:11,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970650998] [2022-07-19 17:35:11,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:11,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 17:35:11,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:11,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 17:35:11,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 17:35:11,738 INFO L87 Difference]: Start difference. First operand 134 states and 223 transitions. Second operand has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:15,657 INFO L93 Difference]: Finished difference Result 335 states and 640 transitions. [2022-07-19 17:35:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 17:35:15,657 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2022-07-19 17:35:15,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:15,659 INFO L225 Difference]: With dead ends: 335 [2022-07-19 17:35:15,659 INFO L226 Difference]: Without dead ends: 223 [2022-07-19 17:35:15,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=874, Invalid=11558, Unknown=0, NotChecked=0, Total=12432 [2022-07-19 17:35:15,663 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 184 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 2894 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:15,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 415 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2894 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 17:35:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-19 17:35:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 152. [2022-07-19 17:35:15,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 108 states have (on average 1.212962962962963) internal successors, (131), 114 states have internal predecessors, (131), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (122), 26 states have call predecessors, (122), 12 states have call successors, (122) [2022-07-19 17:35:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 273 transitions. [2022-07-19 17:35:15,718 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 273 transitions. Word has length 71 [2022-07-19 17:35:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:15,718 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 273 transitions. [2022-07-19 17:35:15,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 273 transitions. [2022-07-19 17:35:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 17:35:15,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:15,720 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:15,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 17:35:15,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:15,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2022-07-19 17:35:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:15,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643798045] [2022-07-19 17:35:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:15,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:16,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:16,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:16,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 17:35:16,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643798045] [2022-07-19 17:35:16,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643798045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:16,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589368302] [2022-07-19 17:35:16,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:35:16,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:16,062 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) [2022-07-19 17:35:16,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 17:35:16,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:35:16,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:16,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 17:35:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 17:35:16,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 17:35:16,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589368302] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:35:16,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:35:16,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2022-07-19 17:35:16,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833082529] [2022-07-19 17:35:16,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:16,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 17:35:16,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:16,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 17:35:16,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-19 17:35:16,556 INFO L87 Difference]: Start difference. First operand 152 states and 273 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 17:35:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:17,524 INFO L93 Difference]: Finished difference Result 305 states and 646 transitions. [2022-07-19 17:35:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 17:35:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2022-07-19 17:35:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:17,526 INFO L225 Difference]: With dead ends: 305 [2022-07-19 17:35:17,526 INFO L226 Difference]: Without dead ends: 175 [2022-07-19 17:35:17,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 17:35:17,528 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:17,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 297 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 17:35:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-07-19 17:35:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 158. [2022-07-19 17:35:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 113 states have (on average 1.168141592920354) internal successors, (132), 118 states have internal predecessors, (132), 20 states have call successors, (20), 11 states have call predecessors, (20), 24 states have return successors, (129), 28 states have call predecessors, (129), 12 states have call successors, (129) [2022-07-19 17:35:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 281 transitions. [2022-07-19 17:35:17,553 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 281 transitions. Word has length 71 [2022-07-19 17:35:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:17,553 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 281 transitions. [2022-07-19 17:35:17,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 17:35:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 281 transitions. [2022-07-19 17:35:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 17:35:17,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:17,555 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:17,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:17,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:17,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:17,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2022-07-19 17:35:17,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:17,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372960590] [2022-07-19 17:35:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 17:35:18,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372960590] [2022-07-19 17:35:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372960590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:18,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38770641] [2022-07-19 17:35:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:18,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:18,439 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) [2022-07-19 17:35:18,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 17:35:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 17:35:18,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:19,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:35:19,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 17:35:19,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:35:19,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:20,321 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:35:20,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2022-07-19 17:35:20,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38770641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:20,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:20,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2022-07-19 17:35:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265106851] [2022-07-19 17:35:20,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:20,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 17:35:20,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:20,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 17:35:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 17:35:20,859 INFO L87 Difference]: Start difference. First operand 158 states and 281 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:24,263 INFO L93 Difference]: Finished difference Result 191 states and 326 transitions. [2022-07-19 17:35:24,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 17:35:24,264 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2022-07-19 17:35:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:24,265 INFO L225 Difference]: With dead ends: 191 [2022-07-19 17:35:24,265 INFO L226 Difference]: Without dead ends: 189 [2022-07-19 17:35:24,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 17:35:24,268 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 172 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:24,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 381 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 17:35:24,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-19 17:35:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 153. [2022-07-19 17:35:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 109 states have (on average 1.165137614678899) internal successors, (127), 114 states have internal predecessors, (127), 20 states have call successors, (20), 11 states have call predecessors, (20), 23 states have return successors, (123), 27 states have call predecessors, (123), 12 states have call successors, (123) [2022-07-19 17:35:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 270 transitions. [2022-07-19 17:35:24,291 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 270 transitions. Word has length 72 [2022-07-19 17:35:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:24,292 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 270 transitions. [2022-07-19 17:35:24,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:35:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 270 transitions. [2022-07-19 17:35:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 17:35:24,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:24,293 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:24,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:24,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:24,506 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2022-07-19 17:35:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:24,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194126297] [2022-07-19 17:35:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:24,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:35:24,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:24,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194126297] [2022-07-19 17:35:24,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194126297] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:24,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886063825] [2022-07-19 17:35:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:24,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:24,993 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) [2022-07-19 17:35:25,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 17:35:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-19 17:35:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:25,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:35:25,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 17:35:25,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 17:35:25,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:25,791 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-19 17:35:25,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 17:35:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886063825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:25,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2022-07-19 17:35:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72631475] [2022-07-19 17:35:25,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 17:35:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 17:35:25,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 17:35:25,885 INFO L87 Difference]: Start difference. First operand 153 states and 270 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-19 17:35:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:27,255 INFO L93 Difference]: Finished difference Result 189 states and 309 transitions. [2022-07-19 17:35:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 17:35:27,256 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2022-07-19 17:35:27,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:27,258 INFO L225 Difference]: With dead ends: 189 [2022-07-19 17:35:27,258 INFO L226 Difference]: Without dead ends: 187 [2022-07-19 17:35:27,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 17:35:27,259 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:27,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 337 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 17:35:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-19 17:35:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-07-19 17:35:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 98 states have (on average 1.183673469387755) internal successors, (116), 99 states have internal predecessors, (116), 19 states have call successors, (19), 10 states have call predecessors, (19), 18 states have return successors, (93), 26 states have call predecessors, (93), 12 states have call successors, (93) [2022-07-19 17:35:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 228 transitions. [2022-07-19 17:35:27,287 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 228 transitions. Word has length 72 [2022-07-19 17:35:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:27,287 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 228 transitions. [2022-07-19 17:35:27,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-19 17:35:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 228 transitions. [2022-07-19 17:35:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 17:35:27,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:27,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:27,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:27,498 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,SelfDestructingSolverStorable9 [2022-07-19 17:35:27,498 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 2 times [2022-07-19 17:35:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:27,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464389482] [2022-07-19 17:35:27,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-19 17:35:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:27,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:35:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 17:35:27,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:27,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464389482] [2022-07-19 17:35:27,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464389482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:27,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955817830] [2022-07-19 17:35:27,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:35:27,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:27,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:27,758 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) [2022-07-19 17:35:27,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 17:35:27,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:35:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:27,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 17:35:27,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:27,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:35:27,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:35:27,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:35:27,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:35:28,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:28,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 17:35:28,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 17:35:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955817830] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:35:28,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:35:28,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2022-07-19 17:35:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519933536] [2022-07-19 17:35:28,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:28,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 17:35:28,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 17:35:28,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-07-19 17:35:28,518 INFO L87 Difference]: Start difference. First operand 136 states and 228 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-19 17:35:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:28,751 INFO L93 Difference]: Finished difference Result 243 states and 415 transitions. [2022-07-19 17:35:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 17:35:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2022-07-19 17:35:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:28,753 INFO L225 Difference]: With dead ends: 243 [2022-07-19 17:35:28,753 INFO L226 Difference]: Without dead ends: 141 [2022-07-19 17:35:28,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2022-07-19 17:35:28,755 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:28,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 482 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 200 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-07-19 17:35:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-19 17:35:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-07-19 17:35:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 20 states have call successors, (20), 10 states have call predecessors, (20), 19 states have return successors, (99), 28 states have call predecessors, (99), 13 states have call successors, (99) [2022-07-19 17:35:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 238 transitions. [2022-07-19 17:35:28,768 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 238 transitions. Word has length 60 [2022-07-19 17:35:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:28,769 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 238 transitions. [2022-07-19 17:35:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-19 17:35:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 238 transitions. [2022-07-19 17:35:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-19 17:35:28,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:28,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:28,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:28,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:28,987 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2022-07-19 17:35:28,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:28,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669554184] [2022-07-19 17:35:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:28,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:29,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:29,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:35:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:35:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 17:35:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669554184] [2022-07-19 17:35:29,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669554184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:29,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616290450] [2022-07-19 17:35:29,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:35:29,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:29,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:29,378 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) [2022-07-19 17:35:29,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 17:35:29,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 17:35:29,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-19 17:35:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:29,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:35:29,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:35:29,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:35:29,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 17:35:29,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 17:35:29,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:30,013 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-19 17:35:30,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-19 17:35:30,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616290450] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:30,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:30,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2022-07-19 17:35:30,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991000445] [2022-07-19 17:35:30,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:30,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 17:35:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 17:35:30,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 17:35:30,110 INFO L87 Difference]: Start difference. First operand 141 states and 238 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-19 17:35:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:31,081 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2022-07-19 17:35:31,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 17:35:31,082 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2022-07-19 17:35:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:31,083 INFO L225 Difference]: With dead ends: 168 [2022-07-19 17:35:31,083 INFO L226 Difference]: Without dead ends: 166 [2022-07-19 17:35:31,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 17:35:31,084 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 81 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:31,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 265 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:35:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-19 17:35:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 158. [2022-07-19 17:35:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 114 states have (on average 1.1666666666666667) internal successors, (133), 115 states have internal predecessors, (133), 23 states have call successors, (23), 12 states have call predecessors, (23), 20 states have return successors, (105), 30 states have call predecessors, (105), 13 states have call successors, (105) [2022-07-19 17:35:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 261 transitions. [2022-07-19 17:35:31,096 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 261 transitions. Word has length 70 [2022-07-19 17:35:31,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:31,097 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 261 transitions. [2022-07-19 17:35:31,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-19 17:35:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 261 transitions. [2022-07-19 17:35:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 17:35:31,098 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:31,098 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:31,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:31,316 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,SelfDestructingSolverStorable11 [2022-07-19 17:35:31,317 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:31,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2022-07-19 17:35:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:31,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566479011] [2022-07-19 17:35:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:31,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:35:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:35:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 17:35:31,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566479011] [2022-07-19 17:35:31,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566479011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:31,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765749162] [2022-07-19 17:35:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:31,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:31,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:31,890 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:35:31,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 17:35:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:32,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-19 17:35:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:32,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:35:32,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:35:32,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:35:32,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 17:35:32,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:35:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 17:35:32,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:33,659 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-19 17:35:33,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-19 17:35:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765749162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:33,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:33,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2022-07-19 17:35:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768237506] [2022-07-19 17:35:33,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 17:35:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:33,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 17:35:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 17:35:33,873 INFO L87 Difference]: Start difference. First operand 158 states and 261 transitions. Second operand has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-19 17:35:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:35,451 INFO L93 Difference]: Finished difference Result 202 states and 370 transitions. [2022-07-19 17:35:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 17:35:35,452 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2022-07-19 17:35:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:35,454 INFO L225 Difference]: With dead ends: 202 [2022-07-19 17:35:35,454 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 17:35:35,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=546, Invalid=7644, Unknown=0, NotChecked=0, Total=8190 [2022-07-19 17:35:35,455 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 114 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 2214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:35,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 403 Invalid, 2214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2131 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:35:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 17:35:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 169. [2022-07-19 17:35:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 121 states have (on average 1.165289256198347) internal successors, (141), 123 states have internal predecessors, (141), 25 states have call successors, (25), 12 states have call predecessors, (25), 22 states have return successors, (136), 33 states have call predecessors, (136), 15 states have call successors, (136) [2022-07-19 17:35:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 302 transitions. [2022-07-19 17:35:35,467 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 302 transitions. Word has length 71 [2022-07-19 17:35:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:35,468 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 302 transitions. [2022-07-19 17:35:35,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-19 17:35:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 302 transitions. [2022-07-19 17:35:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 17:35:35,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:35,469 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:35,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:35,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 17:35:35,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2022-07-19 17:35:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52960346] [2022-07-19 17:35:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:35,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:35,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:36,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 17:35:36,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:36,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52960346] [2022-07-19 17:35:36,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52960346] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:36,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556705975] [2022-07-19 17:35:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:36,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:36,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:36,189 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:35:36,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 17:35:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2022-07-19 17:35:36,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:36,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:35:36,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:35:36,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:35:36,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:35:36,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:35:36,644 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:35:36,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:35:36,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:35:36,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 17:35:37,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:35:37,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:35:37,494 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:35:37,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-19 17:35:37,498 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 17:35:37,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-19 17:35:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 17:35:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:35:38,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:35:40,291 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| 0 (store (select |c_#memory_$Pointer$.offset| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (store |c_#memory_$Pointer$.base| 0 (store (select |c_#memory_$Pointer$.base| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) (+ 4 |c_nondet_tree_#res.offset|)) 0)) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (let ((.cse0 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse1 (+ 4 |c_nondet_tree_#res.offset|))) (and (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse0 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse1) 0) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse0 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse1) 0))) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (let ((.cse2 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse3 (+ 4 |c_nondet_tree_#res.offset|))) (and (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse2 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse3) 0) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse2 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse3) 0))) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0)))) is different from false [2022-07-19 17:35:42,364 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1450 Int) (v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_7) 0) (let ((.cse1 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ 4 c_nondet_tree_~n~0.offset))) (and (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) .cse2 v_ArrVal_1450)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse1 c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) .cse2 v_ArrVal_1448)))) (store .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse1 c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0))))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_7 Int) (v_ArrVal_1450 Int) (v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (or (let ((.cse6 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8)) (.cse7 (+ 8 c_nondet_tree_~n~0.offset)) (.cse8 (+ 4 c_nondet_tree_~n~0.offset))) (and (= (select (select (let ((.cse5 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) .cse7 v_ArrVal_1450)))) (store .cse5 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse5 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse6 c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse8) 0) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) .cse7 v_ArrVal_1448)))) (store .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_7 (store (select .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_7) .cse6 c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse8) 0))) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 4) 0))) (forall ((v_ArrVal_1450 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1450)))) (store .cse10 0 (store (select .cse10 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0)) (forall ((v_ArrVal_1448 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_26 Int)) (= (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ 8 c_nondet_tree_~n~0.offset) v_ArrVal_1448)))) (store .cse11 0 (store (select .cse11 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_26 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ 4 c_nondet_tree_~n~0.offset)) 0))) is different from false [2022-07-19 17:35:42,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556705975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:42,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:35:42,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2022-07-19 17:35:42,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812459646] [2022-07-19 17:35:42,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:42,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 17:35:42,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:42,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 17:35:42,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2022-07-19 17:35:42,427 INFO L87 Difference]: Start difference. First operand 169 states and 302 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-19 17:35:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:45,137 INFO L93 Difference]: Finished difference Result 452 states and 844 transitions. [2022-07-19 17:35:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 17:35:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2022-07-19 17:35:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:45,140 INFO L225 Difference]: With dead ends: 452 [2022-07-19 17:35:45,141 INFO L226 Difference]: Without dead ends: 440 [2022-07-19 17:35:45,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=648, Invalid=10488, Unknown=2, NotChecked=418, Total=11556 [2022-07-19 17:35:45,142 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 123 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:45,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 672 Invalid, 2595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1830 Invalid, 0 Unknown, 695 Unchecked, 0.8s Time] [2022-07-19 17:35:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-07-19 17:35:45,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 339. [2022-07-19 17:35:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 248 states have (on average 1.189516129032258) internal successors, (295), 254 states have internal predecessors, (295), 38 states have call successors, (38), 21 states have call predecessors, (38), 52 states have return successors, (326), 63 states have call predecessors, (326), 22 states have call successors, (326) [2022-07-19 17:35:45,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 659 transitions. [2022-07-19 17:35:45,172 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 659 transitions. Word has length 76 [2022-07-19 17:35:45,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:45,172 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 659 transitions. [2022-07-19 17:35:45,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2022-07-19 17:35:45,172 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 659 transitions. [2022-07-19 17:35:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 17:35:45,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:45,176 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:45,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 17:35:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 17:35:45,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1523837565, now seen corresponding path program 1 times [2022-07-19 17:35:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025087503] [2022-07-19 17:35:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:35:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 17:35:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:35:45,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025087503] [2022-07-19 17:35:45,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025087503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:45,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96191825] [2022-07-19 17:35:45,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:45,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:45,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:45,622 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:35:45,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 17:35:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 17:35:45,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:45,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:35:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:35:45,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:35:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:35:46,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96191825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:35:46,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:35:46,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2022-07-19 17:35:46,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17752246] [2022-07-19 17:35:46,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:35:46,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 17:35:46,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:35:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 17:35:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-07-19 17:35:46,338 INFO L87 Difference]: Start difference. First operand 339 states and 659 transitions. Second operand has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:35:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:35:46,683 INFO L93 Difference]: Finished difference Result 490 states and 940 transitions. [2022-07-19 17:35:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 17:35:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 72 [2022-07-19 17:35:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:35:46,694 INFO L225 Difference]: With dead ends: 490 [2022-07-19 17:35:46,694 INFO L226 Difference]: Without dead ends: 463 [2022-07-19 17:35:46,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 17:35:46,697 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 57 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:35:46,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 367 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 426 Invalid, 0 Unknown, 151 Unchecked, 0.1s Time] [2022-07-19 17:35:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-07-19 17:35:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 365. [2022-07-19 17:35:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 268 states have (on average 1.2014925373134329) internal successors, (322), 271 states have internal predecessors, (322), 41 states have call successors, (41), 23 states have call predecessors, (41), 55 states have return successors, (266), 70 states have call predecessors, (266), 25 states have call successors, (266) [2022-07-19 17:35:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 629 transitions. [2022-07-19 17:35:46,723 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 629 transitions. Word has length 72 [2022-07-19 17:35:46,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:35:46,723 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 629 transitions. [2022-07-19 17:35:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.0) internal successors, (75), 25 states have internal predecessors, (75), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:35:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 629 transitions. [2022-07-19 17:35:46,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-19 17:35:46,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:35:46,726 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:35:46,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 17:35:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 17:35:46,943 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:35:46,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:35:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 3 times [2022-07-19 17:35:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:35:46,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512041795] [2022-07-19 17:35:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:35:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:35:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:35:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:35:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:35:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:35:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:35:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:35:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 17:35:47,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:35:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512041795] [2022-07-19 17:35:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512041795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:35:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577158699] [2022-07-19 17:35:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:35:47,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:35:47,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:35:47,441 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:35:47,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 17:35:47,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 17:35:47,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:35:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-19 17:35:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:35:47,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:35:47,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:35:47,869 INFO L356 Elim1Store]: treesize reduction 31, result has 44.6 percent of original size [2022-07-19 17:35:47,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 37 [2022-07-19 17:35:50,000 WARN L855 $PredicateComparison]: unable to prove that (or (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8) 0) (= |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)))) (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27| Int)) (not (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8)) (+ 8 (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_27|) 8))) 0)))) is different from true [2022-07-19 17:35:58,264 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:36:06,612 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:36:14,833 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:36:15,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:36:15,587 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 17:36:15,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2022-07-19 17:36:15,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:15,598 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 31 refuted. 0 times theorem prover too weak. 54 trivial. 18 not checked. [2022-07-19 17:36:15,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:16,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577158699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:16,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:16,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 44 [2022-07-19 17:36:16,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318640295] [2022-07-19 17:36:16,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:16,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 17:36:16,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:16,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 17:36:16,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2708, Unknown=4, NotChecked=104, Total=2970 [2022-07-19 17:36:16,379 INFO L87 Difference]: Start difference. First operand 365 states and 629 transitions. Second operand has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-19 17:36:30,324 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:36:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:36:31,986 INFO L93 Difference]: Finished difference Result 871 states and 1560 transitions. [2022-07-19 17:36:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 17:36:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) Word has length 86 [2022-07-19 17:36:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:36:31,992 INFO L225 Difference]: With dead ends: 871 [2022-07-19 17:36:31,992 INFO L226 Difference]: Without dead ends: 778 [2022-07-19 17:36:31,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=461, Invalid=8095, Unknown=4, NotChecked=182, Total=8742 [2022-07-19 17:36:31,994 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 152 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 2884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:36:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 933 Invalid, 2884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2134 Invalid, 0 Unknown, 697 Unchecked, 0.9s Time] [2022-07-19 17:36:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-07-19 17:36:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 650. [2022-07-19 17:36:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 489 states have (on average 1.2269938650306749) internal successors, (600), 489 states have internal predecessors, (600), 54 states have call successors, (54), 32 states have call predecessors, (54), 106 states have return successors, (545), 128 states have call predecessors, (545), 30 states have call successors, (545) [2022-07-19 17:36:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1199 transitions. [2022-07-19 17:36:32,040 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1199 transitions. Word has length 86 [2022-07-19 17:36:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:36:32,042 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 1199 transitions. [2022-07-19 17:36:32,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (24), 7 states have call predecessors, (24), 13 states have return successors, (19), 16 states have call predecessors, (19), 10 states have call successors, (19) [2022-07-19 17:36:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1199 transitions. [2022-07-19 17:36:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 17:36:32,046 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:36:32,046 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:36:32,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 17:36:32,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:32,265 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:36:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:36:32,265 INFO L85 PathProgramCache]: Analyzing trace with hash 215586468, now seen corresponding path program 2 times [2022-07-19 17:36:32,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:36:32,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631474741] [2022-07-19 17:36:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:36:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:36:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:36:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:36:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:32,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 17:36:32,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:36:32,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631474741] [2022-07-19 17:36:32,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631474741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:32,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739539367] [2022-07-19 17:36:32,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:36:32,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:32,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:36:32,893 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:36:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 17:36:33,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:36:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:36:33,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 17:36:33,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:36:33,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:36:33,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:33,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:33,289 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_2032 (Array Int Int)) (v_ArrVal_2031 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2031)) (= (select |c_old(#valid)| nondet_tree_~n~0.base) 0) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2032)))) is different from true [2022-07-19 17:36:33,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:36:33,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 17:36:33,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:36:33,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-19 17:36:33,309 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:36:33,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:36:33,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:36:33,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:36:33,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:33,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 177 trivial. 8 not checked. [2022-07-19 17:36:33,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:33,922 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 17:36:33,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-07-19 17:36:33,925 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 17:36:33,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2022-07-19 17:36:34,020 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2075 (Array Int Int)) (v_ArrVal_2074 (Array Int Int)) (v_nondet_tree_~n~0.base_60 Int)) (or (not (= (select |c_#valid| v_nondet_tree_~n~0.base_60) 0)) (let ((.cse0 (+ 4 c_nondet_tree_~n~0.offset))) (and (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_60 v_ArrVal_2075) c_nondet_tree_~n~0.base) .cse0) 0) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_60 v_ArrVal_2074) c_nondet_tree_~n~0.base) .cse0) 0))))) is different from false [2022-07-19 17:36:34,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739539367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:34,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:34,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 33 [2022-07-19 17:36:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095520440] [2022-07-19 17:36:34,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:34,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 17:36:34,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 17:36:34,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1293, Unknown=2, NotChecked=146, Total=1560 [2022-07-19 17:36:34,022 INFO L87 Difference]: Start difference. First operand 650 states and 1199 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:36:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:36:35,365 INFO L93 Difference]: Finished difference Result 755 states and 1340 transitions. [2022-07-19 17:36:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 17:36:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 97 [2022-07-19 17:36:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:36:35,370 INFO L225 Difference]: With dead ends: 755 [2022-07-19 17:36:35,370 INFO L226 Difference]: Without dead ends: 686 [2022-07-19 17:36:35,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=361, Invalid=3305, Unknown=2, NotChecked=238, Total=3906 [2022-07-19 17:36:35,371 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 64 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:36:35,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 534 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 258 Unchecked, 0.6s Time] [2022-07-19 17:36:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-19 17:36:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 600. [2022-07-19 17:36:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 452 states have (on average 1.2234513274336283) internal successors, (553), 448 states have internal predecessors, (553), 54 states have call successors, (54), 32 states have call predecessors, (54), 93 states have return successors, (459), 119 states have call predecessors, (459), 30 states have call successors, (459) [2022-07-19 17:36:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1066 transitions. [2022-07-19 17:36:35,410 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1066 transitions. Word has length 97 [2022-07-19 17:36:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:36:35,410 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 1066 transitions. [2022-07-19 17:36:35,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 14 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2022-07-19 17:36:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1066 transitions. [2022-07-19 17:36:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-19 17:36:35,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:36:35,414 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:36:35,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 17:36:35,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 17:36:35,642 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:36:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:36:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 2 times [2022-07-19 17:36:35,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:36:35,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564714448] [2022-07-19 17:36:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:36:35,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:36:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:36:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:36:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:36,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:36,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 17:36:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 17:36:36,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:36:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564714448] [2022-07-19 17:36:36,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564714448] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:36,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661337299] [2022-07-19 17:36:36,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:36:36,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:36,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:36:36,144 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:36:36,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 17:36:36,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:36:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:36:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 17:36:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:36:36,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:36:36,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:36:37,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:36:37,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-19 17:36:37,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 17:36:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:38,078 INFO L356 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2022-07-19 17:36:38,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2022-07-19 17:36:38,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661337299] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:38,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:38,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2022-07-19 17:36:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835318563] [2022-07-19 17:36:38,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:38,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 17:36:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:38,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 17:36:38,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 17:36:38,455 INFO L87 Difference]: Start difference. First operand 600 states and 1066 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-19 17:36:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:36:42,351 INFO L93 Difference]: Finished difference Result 893 states and 1845 transitions. [2022-07-19 17:36:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 17:36:42,371 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2022-07-19 17:36:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:36:42,376 INFO L225 Difference]: With dead ends: 893 [2022-07-19 17:36:42,376 INFO L226 Difference]: Without dead ends: 891 [2022-07-19 17:36:42,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3454 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2022-07-19 17:36:42,378 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 158 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 3835 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:36:42,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 472 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3835 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 17:36:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-07-19 17:36:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 589. [2022-07-19 17:36:42,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 445 states have (on average 1.2247191011235956) internal successors, (545), 440 states have internal predecessors, (545), 52 states have call successors, (52), 32 states have call predecessors, (52), 91 states have return successors, (438), 116 states have call predecessors, (438), 28 states have call successors, (438) [2022-07-19 17:36:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1035 transitions. [2022-07-19 17:36:42,423 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1035 transitions. Word has length 72 [2022-07-19 17:36:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:36:42,425 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 1035 transitions. [2022-07-19 17:36:42,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-19 17:36:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1035 transitions. [2022-07-19 17:36:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 17:36:42,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:36:42,428 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:36:42,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 17:36:42,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 17:36:42,662 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:36:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:36:42,662 INFO L85 PathProgramCache]: Analyzing trace with hash -118617124, now seen corresponding path program 4 times [2022-07-19 17:36:42,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:36:42,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258819424] [2022-07-19 17:36:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:36:42,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:36:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:36:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:42,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:42,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:43,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 34 proven. 49 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-19 17:36:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:36:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258819424] [2022-07-19 17:36:43,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258819424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714915634] [2022-07-19 17:36:43,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:36:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:43,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:36:43,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:36:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 17:36:43,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:36:43,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:36:43,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-19 17:36:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:36:43,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:36:43,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:43,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:43,411 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:36:43,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:36:43,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 17:36:43,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 17:36:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 35 proven. 49 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 17:36:44,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714915634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:44,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:44,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 35 [2022-07-19 17:36:44,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753680320] [2022-07-19 17:36:44,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:44,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 17:36:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:44,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 17:36:44,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 17:36:44,467 INFO L87 Difference]: Start difference. First operand 589 states and 1035 transitions. Second operand has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-19 17:36:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:36:45,561 INFO L93 Difference]: Finished difference Result 1008 states and 1863 transitions. [2022-07-19 17:36:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 17:36:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) Word has length 89 [2022-07-19 17:36:45,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:36:45,566 INFO L225 Difference]: With dead ends: 1008 [2022-07-19 17:36:45,566 INFO L226 Difference]: Without dead ends: 852 [2022-07-19 17:36:45,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=3568, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 17:36:45,568 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 85 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:36:45,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 591 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 948 Invalid, 0 Unknown, 249 Unchecked, 0.4s Time] [2022-07-19 17:36:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-07-19 17:36:45,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 642. [2022-07-19 17:36:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 485 states have (on average 1.2288659793814434) internal successors, (596), 482 states have internal predecessors, (596), 52 states have call successors, (52), 32 states have call predecessors, (52), 104 states have return successors, (519), 127 states have call predecessors, (519), 28 states have call successors, (519) [2022-07-19 17:36:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1167 transitions. [2022-07-19 17:36:45,612 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1167 transitions. Word has length 89 [2022-07-19 17:36:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:36:45,612 INFO L495 AbstractCegarLoop]: Abstraction has 642 states and 1167 transitions. [2022-07-19 17:36:45,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 28 states have internal predecessors, (75), 16 states have call successors, (23), 5 states have call predecessors, (23), 14 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-19 17:36:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1167 transitions. [2022-07-19 17:36:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 17:36:45,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:36:45,616 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:36:45,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 17:36:45,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:45,833 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:36:45,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:36:45,834 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2022-07-19 17:36:45,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:36:45,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743152395] [2022-07-19 17:36:45,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:36:45,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:36:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:36:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-19 17:36:46,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:36:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743152395] [2022-07-19 17:36:46,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743152395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134894690] [2022-07-19 17:36:46,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:36:46,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:46,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:36:46,535 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:36:46,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 17:36:47,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 17:36:47,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:36:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-19 17:36:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:36:47,855 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:47,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 65 [2022-07-19 17:36:47,861 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:47,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 48 [2022-07-19 17:36:48,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-19 17:36:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-07-19 17:36:48,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:48,831 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:48,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2022-07-19 17:36:49,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:49,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 56 [2022-07-19 17:36:49,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134894690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:49,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:49,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 30] total 56 [2022-07-19 17:36:49,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372257718] [2022-07-19 17:36:49,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:49,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 17:36:49,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 17:36:49,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4635, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 17:36:49,428 INFO L87 Difference]: Start difference. First operand 642 states and 1167 transitions. Second operand has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:36:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:36:53,237 INFO L93 Difference]: Finished difference Result 1019 states and 2036 transitions. [2022-07-19 17:36:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 17:36:53,238 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) Word has length 99 [2022-07-19 17:36:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:36:53,242 INFO L225 Difference]: With dead ends: 1019 [2022-07-19 17:36:53,242 INFO L226 Difference]: Without dead ends: 1017 [2022-07-19 17:36:53,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1082, Invalid=14418, Unknown=0, NotChecked=0, Total=15500 [2022-07-19 17:36:53,244 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 160 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 3103 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 3613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:36:53,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 476 Invalid, 3613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3103 Invalid, 0 Unknown, 417 Unchecked, 1.1s Time] [2022-07-19 17:36:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-07-19 17:36:53,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 782. [2022-07-19 17:36:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 586 states have (on average 1.226962457337884) internal successors, (719), 598 states have internal predecessors, (719), 58 states have call successors, (58), 36 states have call predecessors, (58), 137 states have return successors, (678), 147 states have call predecessors, (678), 28 states have call successors, (678) [2022-07-19 17:36:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1455 transitions. [2022-07-19 17:36:53,306 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1455 transitions. Word has length 99 [2022-07-19 17:36:53,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:36:53,306 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1455 transitions. [2022-07-19 17:36:53,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 40 states have internal predecessors, (87), 18 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (21), 17 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:36:53,306 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1455 transitions. [2022-07-19 17:36:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-19 17:36:53,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:36:53,311 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:36:53,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 17:36:53,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:53,531 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:36:53,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:36:53,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1679039551, now seen corresponding path program 3 times [2022-07-19 17:36:53,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:36:53,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486900104] [2022-07-19 17:36:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:36:53,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:36:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:53,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:53,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:36:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:36:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:36:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:36:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:36:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:36:55,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:36:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-07-19 17:36:55,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:36:55,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486900104] [2022-07-19 17:36:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486900104] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556695698] [2022-07-19 17:36:55,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:36:55,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:36:55,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:36:55,761 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:36:55,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 17:36:56,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 17:36:56,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:36:56,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 134 conjunts are in the unsatisfiable core [2022-07-19 17:36:56,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:36:56,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:36:56,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:56,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:36:56,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-19 17:36:56,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-07-19 17:36:56,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-07-19 17:36:56,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 20 [2022-07-19 17:36:56,766 WARN L855 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_arrayElimArr_6 (Array Int Int)) (v_arrayElimArr_5 (Array Int Int))) (and (= (select v_arrayElimArr_6 4) 0) (= (select v_arrayElimArr_5 4) 0) (= (select v_arrayElimArr_6 8) 0) (= (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_arrayElimArr_6) |c_#memory_$Pointer$.offset|) (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_arrayElimArr_5) |c_#memory_$Pointer$.base|))) is different from true [2022-07-19 17:36:56,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:36:56,962 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-19 17:36:56,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-07-19 17:36:56,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:36:56,975 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-19 17:36:56,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 31 [2022-07-19 17:36:56,982 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:36:56,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:36:56,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-19 17:36:57,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-19 17:36:57,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:36:57,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-19 17:36:57,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:57,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 17:36:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 180 trivial. 12 not checked. [2022-07-19 17:36:57,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:36:57,981 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 17:36:57,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2022-07-19 17:36:57,984 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 17:36:57,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 1 [2022-07-19 17:36:58,277 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:58,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-07-19 17:36:58,287 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:36:58,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2022-07-19 17:36:58,312 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2979 (Array Int Int)) (v_nondet_tree_~n~0.base_88 Int) (v_ArrVal_2978 (Array Int Int)) (v_nondet_tree_~n~0.base_89 Int) (v_ArrVal_2983 (Array Int Int)) (v_ArrVal_2982 (Array Int Int)) (v_ArrVal_2984 Int) (v_ArrVal_2981 (Array Int Int)) (v_ArrVal_2980 (Array Int Int))) (or (let ((.cse0 (+ 4 c_nondet_tree_~n~0.offset))) (and (= (select (select (store (store (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_89 v_ArrVal_2982) v_nondet_tree_~n~0.base_88 (store (store v_ArrVal_2981 4 0) 8 v_ArrVal_2984)) v_nondet_tree_~n~0.base_89 v_ArrVal_2979) c_nondet_tree_~n~0.base) .cse0) 0) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_89 v_ArrVal_2983) v_nondet_tree_~n~0.base_88 (store (store v_ArrVal_2980 4 0) 8 0)) v_nondet_tree_~n~0.base_89 v_ArrVal_2978) c_nondet_tree_~n~0.base) .cse0) 0))) (not (= (select |c_#valid| v_nondet_tree_~n~0.base_89) 0)))) is different from false [2022-07-19 17:36:58,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556695698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:36:58,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:36:58,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 34 [2022-07-19 17:36:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591442702] [2022-07-19 17:36:58,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:36:58,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 17:36:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:36:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 17:36:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1335, Unknown=20, NotChecked=150, Total=1640 [2022-07-19 17:36:58,314 INFO L87 Difference]: Start difference. First operand 782 states and 1455 transitions. Second operand has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-19 17:37:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:04,021 INFO L93 Difference]: Finished difference Result 1316 states and 2476 transitions. [2022-07-19 17:37:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 17:37:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) Word has length 107 [2022-07-19 17:37:04,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:04,027 INFO L225 Difference]: With dead ends: 1316 [2022-07-19 17:37:04,027 INFO L226 Difference]: Without dead ends: 1300 [2022-07-19 17:37:04,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 193 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=296, Invalid=2541, Unknown=33, NotChecked=210, Total=3080 [2022-07-19 17:37:04,028 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 42 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:04,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 357 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 496 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-07-19 17:37:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-07-19 17:37:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1040. [2022-07-19 17:37:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 778 states have (on average 1.2352185089974292) internal successors, (961), 797 states have internal predecessors, (961), 69 states have call successors, (69), 41 states have call predecessors, (69), 192 states have return successors, (868), 201 states have call predecessors, (868), 37 states have call successors, (868) [2022-07-19 17:37:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1898 transitions. [2022-07-19 17:37:04,100 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1898 transitions. Word has length 107 [2022-07-19 17:37:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:04,100 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 1898 transitions. [2022-07-19 17:37:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 23 states have internal predecessors, (63), 10 states have call successors, (22), 8 states have call predecessors, (22), 12 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-07-19 17:37:04,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1898 transitions. [2022-07-19 17:37:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-19 17:37:04,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:04,106 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:04,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 17:37:04,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:04,324 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 3 times [2022-07-19 17:37:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:04,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326228661] [2022-07-19 17:37:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:04,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:37:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 46 proven. 82 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 17:37:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326228661] [2022-07-19 17:37:05,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326228661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271664224] [2022-07-19 17:37:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:37:05,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:05,470 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:05,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 17:37:06,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 17:37:06,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:37:06,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-19 17:37:06,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:06,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:37:06,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:37:06,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:37:06,500 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:37:06,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:37:06,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:37:06,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:37:06,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 17:37:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:37:08,994 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-19 17:37:08,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 50 [2022-07-19 17:37:09,000 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 17:37:09,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-07-19 17:37:09,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-19 17:37:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 47 proven. 87 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-19 17:37:09,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:37:10,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271664224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:10,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:37:10,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36] total 68 [2022-07-19 17:37:10,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912570085] [2022-07-19 17:37:10,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:37:10,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 17:37:10,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:10,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 17:37:10,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6395, Unknown=2, NotChecked=0, Total=6642 [2022-07-19 17:37:10,543 INFO L87 Difference]: Start difference. First operand 1040 states and 1898 transitions. Second operand has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-19 17:37:19,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:19,526 INFO L93 Difference]: Finished difference Result 3098 states and 7729 transitions. [2022-07-19 17:37:19,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-07-19 17:37:19,527 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) Word has length 100 [2022-07-19 17:37:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:19,546 INFO L225 Difference]: With dead ends: 3098 [2022-07-19 17:37:19,546 INFO L226 Difference]: Without dead ends: 3096 [2022-07-19 17:37:19,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9282 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=1541, Invalid=34746, Unknown=3, NotChecked=0, Total=36290 [2022-07-19 17:37:19,549 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 167 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 4342 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 6384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1973 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:19,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 930 Invalid, 6384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4342 Invalid, 0 Unknown, 1973 Unchecked, 2.0s Time] [2022-07-19 17:37:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2022-07-19 17:37:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2000. [2022-07-19 17:37:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1527 states have (on average 1.2822527832351016) internal successors, (1958), 1495 states have internal predecessors, (1958), 103 states have call successors, (103), 54 states have call predecessors, (103), 369 states have return successors, (2675), 450 states have call predecessors, (2675), 66 states have call successors, (2675) [2022-07-19 17:37:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 4736 transitions. [2022-07-19 17:37:19,849 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 4736 transitions. Word has length 100 [2022-07-19 17:37:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:19,849 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 4736 transitions. [2022-07-19 17:37:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 50 states have internal predecessors, (104), 23 states have call successors, (32), 10 states have call predecessors, (32), 16 states have return successors, (24), 22 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-19 17:37:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 4736 transitions. [2022-07-19 17:37:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 17:37:19,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:19,858 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:19,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:20,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 17:37:20,078 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:20,079 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2022-07-19 17:37:20,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:20,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334739441] [2022-07-19 17:37:20,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:20,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:37:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:37:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:37:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 17:37:20,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334739441] [2022-07-19 17:37:20,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334739441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831615298] [2022-07-19 17:37:20,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:37:20,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:20,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:20,932 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:20,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 17:37:21,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:37:21,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:37:21,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-19 17:37:21,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:21,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:37:21,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:37:21,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:37:22,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:37:22,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2022-07-19 17:37:22,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:37:22,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-19 17:37:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 17:37:22,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:37:22,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831615298] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:22,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:37:22,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 19] total 49 [2022-07-19 17:37:22,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998897556] [2022-07-19 17:37:22,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:37:22,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 17:37:22,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:22,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 17:37:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2695, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 17:37:22,565 INFO L87 Difference]: Start difference. First operand 2000 states and 4736 transitions. Second operand has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-19 17:37:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:27,725 INFO L93 Difference]: Finished difference Result 9864 states and 36483 transitions. [2022-07-19 17:37:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-19 17:37:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) Word has length 76 [2022-07-19 17:37:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:27,903 INFO L225 Difference]: With dead ends: 9864 [2022-07-19 17:37:27,903 INFO L226 Difference]: Without dead ends: 9851 [2022-07-19 17:37:27,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1262, Invalid=13500, Unknown=0, NotChecked=0, Total=14762 [2022-07-19 17:37:27,910 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 379 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 3799 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 5377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 3799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1074 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:27,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 597 Invalid, 5377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 3799 Invalid, 0 Unknown, 1074 Unchecked, 1.9s Time] [2022-07-19 17:37:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9851 states. [2022-07-19 17:37:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9851 to 4466. [2022-07-19 17:37:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4466 states, 3446 states have (on average 1.2962855484619848) internal successors, (4467), 3274 states have internal predecessors, (4467), 242 states have call successors, (242), 81 states have call predecessors, (242), 777 states have return successors, (10402), 1110 states have call predecessors, (10402), 186 states have call successors, (10402) [2022-07-19 17:37:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4466 states to 4466 states and 15111 transitions. [2022-07-19 17:37:28,743 INFO L78 Accepts]: Start accepts. Automaton has 4466 states and 15111 transitions. Word has length 76 [2022-07-19 17:37:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:28,743 INFO L495 AbstractCegarLoop]: Abstraction has 4466 states and 15111 transitions. [2022-07-19 17:37:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 40 states have (on average 2.15) internal successors, (86), 38 states have internal predecessors, (86), 18 states have call successors, (23), 10 states have call predecessors, (23), 15 states have return successors, (19), 14 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-19 17:37:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4466 states and 15111 transitions. [2022-07-19 17:37:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 17:37:28,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:28,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:28,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 17:37:28,978 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:28,978 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2022-07-19 17:37:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869481776] [2022-07-19 17:37:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:37:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 17:37:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:37:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 17:37:29,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869481776] [2022-07-19 17:37:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869481776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067883098] [2022-07-19 17:37:29,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:37:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:29,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:29,447 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:29,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 17:37:29,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:37:29,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:37:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-19 17:37:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:29,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:37:29,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:37:29,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-19 17:37:29,802 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:37:29,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:37:29,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 17:37:29,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-19 17:37:29,835 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-19 17:37:29,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2022-07-19 17:37:29,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-07-19 17:37:30,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 17:37:30,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:37:30,439 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-19 17:37:30,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2022-07-19 17:37:30,444 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-19 17:37:30,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-07-19 17:37:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 17:37:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:37:31,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:37:31,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-19 17:37:31,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067883098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:31,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:37:31,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 33 [2022-07-19 17:37:31,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437183613] [2022-07-19 17:37:31,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:37:31,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 17:37:31,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 17:37:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 17:37:31,197 INFO L87 Difference]: Start difference. First operand 4466 states and 15111 transitions. Second operand has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-19 17:37:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:37:32,034 INFO L93 Difference]: Finished difference Result 4661 states and 15508 transitions. [2022-07-19 17:37:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 17:37:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 76 [2022-07-19 17:37:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:37:32,084 INFO L225 Difference]: With dead ends: 4661 [2022-07-19 17:37:32,084 INFO L226 Difference]: Without dead ends: 4599 [2022-07-19 17:37:32,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=3059, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 17:37:32,090 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 99 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 17:37:32,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 580 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1035 Invalid, 0 Unknown, 306 Unchecked, 0.4s Time] [2022-07-19 17:37:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4599 states. [2022-07-19 17:37:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4599 to 4593. [2022-07-19 17:37:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 3537 states have (on average 1.2945999434549054) internal successors, (4579), 3364 states have internal predecessors, (4579), 258 states have call successors, (258), 87 states have call predecessors, (258), 797 states have return successors, (10568), 1141 states have call predecessors, (10568), 200 states have call successors, (10568) [2022-07-19 17:37:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 15405 transitions. [2022-07-19 17:37:32,753 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 15405 transitions. Word has length 76 [2022-07-19 17:37:32,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:37:32,753 INFO L495 AbstractCegarLoop]: Abstraction has 4593 states and 15405 transitions. [2022-07-19 17:37:32,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 22 states have internal predecessors, (65), 11 states have call successors, (21), 10 states have call predecessors, (21), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2022-07-19 17:37:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 15405 transitions. [2022-07-19 17:37:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 17:37:32,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:37:32,775 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:37:32,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 17:37:32,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:32,993 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:37:32,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:37:32,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1500376225, now seen corresponding path program 4 times [2022-07-19 17:37:32,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:37:32,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204459728] [2022-07-19 17:37:32,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:37:32,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:37:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:33,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:33,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:37:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:37:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:37:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:37:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:35,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:37:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:37:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:37:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:37:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-07-19 17:37:35,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:37:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204459728] [2022-07-19 17:37:35,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204459728] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:35,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57371493] [2022-07-19 17:37:35,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:37:35,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:37:35,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:37:35,562 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:37:35,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 17:37:35,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:37:35,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:37:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-19 17:37:35,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:37:35,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-19 17:37:36,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:37:36,247 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 17:37:36,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 17:37:36,287 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-19 17:37:36,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-19 17:37:36,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 17:37:36,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 17:37:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 74 proven. 66 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 17:37:56,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:37:58,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57371493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:37:58,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:37:58,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2022-07-19 17:37:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270657240] [2022-07-19 17:37:58,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:37:58,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 17:37:58,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:37:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 17:37:58,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2111, Unknown=6, NotChecked=0, Total=2256 [2022-07-19 17:37:58,203 INFO L87 Difference]: Start difference. First operand 4593 states and 15405 transitions. Second operand has 44 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 19 states have call successors, (28), 9 states have call predecessors, (28), 16 states have return successors, (24), 18 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-19 17:38:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:38:46,398 INFO L93 Difference]: Finished difference Result 8101 states and 28339 transitions. [2022-07-19 17:38:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-19 17:38:46,398 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 19 states have call successors, (28), 9 states have call predecessors, (28), 16 states have return successors, (24), 18 states have call predecessors, (24), 17 states have call successors, (24) Word has length 94 [2022-07-19 17:38:46,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:38:46,498 INFO L225 Difference]: With dead ends: 8101 [2022-07-19 17:38:46,499 INFO L226 Difference]: Without dead ends: 7927 [2022-07-19 17:38:46,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=601, Invalid=7930, Unknown=25, NotChecked=0, Total=8556 [2022-07-19 17:38:46,509 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 117 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 585 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:38:46,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 885 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1535 Invalid, 0 Unknown, 585 Unchecked, 4.1s Time] [2022-07-19 17:38:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2022-07-19 17:38:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7033. [2022-07-19 17:38:47,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7033 states, 5443 states have (on average 1.3003858166452325) internal successors, (7078), 5182 states have internal predecessors, (7078), 323 states have call successors, (323), 98 states have call predecessors, (323), 1266 states have return successors, (17079), 1752 states have call predecessors, (17079), 264 states have call successors, (17079) [2022-07-19 17:38:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7033 states to 7033 states and 24480 transitions. [2022-07-19 17:38:47,308 INFO L78 Accepts]: Start accepts. Automaton has 7033 states and 24480 transitions. Word has length 94 [2022-07-19 17:38:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:38:47,309 INFO L495 AbstractCegarLoop]: Abstraction has 7033 states and 24480 transitions. [2022-07-19 17:38:47,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 35 states have internal predecessors, (88), 19 states have call successors, (28), 9 states have call predecessors, (28), 16 states have return successors, (24), 18 states have call predecessors, (24), 17 states have call successors, (24) [2022-07-19 17:38:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7033 states and 24480 transitions. [2022-07-19 17:38:47,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-19 17:38:47,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:38:47,334 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:38:47,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 17:38:47,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:47,553 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:38:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:38:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1176731975, now seen corresponding path program 5 times [2022-07-19 17:38:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:38:47,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441222365] [2022-07-19 17:38:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:38:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:38:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:38:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:38:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:38:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:38:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 17:38:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 17:38:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-19 17:38:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 17:38:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:47,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:38:47,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:38:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:38:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 17:38:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:38:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-19 17:38:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:38:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-19 17:38:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:38:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441222365] [2022-07-19 17:38:48,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441222365] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:48,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75597460] [2022-07-19 17:38:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:38:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:38:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:38:48,109 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 17:38:48,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 17:38:48,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 17:38:48,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:38:48,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 17:38:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:38:49,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-07-19 17:38:49,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-19 17:38:49,363 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-19 17:38:49,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-07-19 17:38:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 30 proven. 56 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 17:38:49,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:38:50,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75597460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:38:50,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:38:50,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 49 [2022-07-19 17:38:50,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131238397] [2022-07-19 17:38:50,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:38:50,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 17:38:50,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:38:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 17:38:50,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3723, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 17:38:50,638 INFO L87 Difference]: Start difference. First operand 7033 states and 24480 transitions. Second operand has 49 states, 40 states have (on average 1.7) internal successors, (68), 36 states have internal predecessors, (68), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17)