./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr2.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 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:09:27,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:09:27,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:09:27,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:09:27,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:09:27,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:09:27,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:09:27,524 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:09:27,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:09:27,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:09:27,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:09:27,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:09:27,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:09:27,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:09:27,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:09:27,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:09:27,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:09:27,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:09:27,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:09:27,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:09:27,545 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:09:27,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:09:27,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:09:27,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:09:27,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:09:27,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:09:27,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:09:27,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:09:27,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:09:27,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:09:27,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:09:27,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:09:27,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:09:27,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:09:27,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:09:27,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:09:27,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:09:27,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:09:27,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:09:27,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:09:27,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:09:27,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:09:27,561 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:09:27,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:09:27,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:09:27,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:09:27,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:09:27,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:09:27,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:09:27,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:09:27,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:09:27,588 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:09:27,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:09:27,589 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:09:27,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:09:27,590 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:09:27,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:09:27,590 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:09:27,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:09:27,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:09:27,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:09:27,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:09:27,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:09:27,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:09:27,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:09:27,592 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:09:27,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:09:27,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:09:27,592 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:09:27,593 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:09:27,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:09:27,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2022-07-13 10:09:27,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:09:27,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:09:27,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:09:27,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:09:27,788 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:09:27,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2022-07-13 10:09:27,827 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b21cedf9b/0c1a3c6f377d47f285bc9b5096357d36/FLAG387a8d306 [2022-07-13 10:09:28,248 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:09:28,249 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2022-07-13 10:09:28,253 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b21cedf9b/0c1a3c6f377d47f285bc9b5096357d36/FLAG387a8d306 [2022-07-13 10:09:28,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b21cedf9b/0c1a3c6f377d47f285bc9b5096357d36 [2022-07-13 10:09:28,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:09:28,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:09:28,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:09:28,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:09:28,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:09:28,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f841427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28, skipping insertion in model container [2022-07-13 10:09:28,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:09:28,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:09:28,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2022-07-13 10:09:28,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:09:28,904 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:09:28,912 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c[395,408] [2022-07-13 10:09:28,917 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:09:28,925 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:09:28,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28 WrapperNode [2022-07-13 10:09:28,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:09:28,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:09:28,927 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:09:28,927 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:09:28,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,948 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-13 10:09:28,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:09:28,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:09:28,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:09:28,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:09:28,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:09:28,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:09:28,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:09:28,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:09:28,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (1/1) ... [2022-07-13 10:09:28,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:09:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:28,999 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) [2022-07-13 10:09:29,001 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 [2022-07-13 10:09:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:09:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:09:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:09:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 10:09:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-13 10:09:29,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-13 10:09:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:09:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:09:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:09:29,071 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:09:29,072 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:09:29,173 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:09:29,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:09:29,178 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:09:29,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:29 BoogieIcfgContainer [2022-07-13 10:09:29,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:09:29,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:09:29,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:09:29,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:09:29,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:09:28" (1/3) ... [2022-07-13 10:09:29,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d65c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:29, skipping insertion in model container [2022-07-13 10:09:29,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:28" (2/3) ... [2022-07-13 10:09:29,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75d65c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:29, skipping insertion in model container [2022-07-13 10:09:29,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:29" (3/3) ... [2022-07-13 10:09:29,184 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2022-07-13 10:09:29,193 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:09:29,194 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:09:29,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:09:29,227 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@233e7fc3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6bec10d [2022-07-13 10:09:29,227 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:09:29,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 10:09:29,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:09:29,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:29,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:29,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:29,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:29,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2022-07-13 10:09:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:29,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79435889] [2022-07-13 10:09:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:29,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:29,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79435889] [2022-07-13 10:09:29,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79435889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:09:29,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:09:29,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:09:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149373153] [2022-07-13 10:09:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:09:29,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:09:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:29,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:09:29,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:09:29,524 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:29,583 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-13 10:09:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:09:29,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 10:09:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:29,589 INFO L225 Difference]: With dead ends: 66 [2022-07-13 10:09:29,589 INFO L226 Difference]: Without dead ends: 32 [2022-07-13 10:09:29,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:09:29,593 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:29,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:09:29,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-13 10:09:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-07-13 10:09:29,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 10:09:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-13 10:09:29,618 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-07-13 10:09:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:29,618 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-13 10:09:29,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 10:09:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-13 10:09:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 10:09:29,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:29,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:29,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:09:29,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2022-07-13 10:09:29,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:29,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274543455] [2022-07-13 10:09:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:29,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:29,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:29,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:29,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274543455] [2022-07-13 10:09:29,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274543455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:29,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044641959] [2022-07-13 10:09:29,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:29,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:29,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:29,835 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) [2022-07-13 10:09:29,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:09:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:29,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:09:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:29,950 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 16 treesize of output 12 [2022-07-13 10:09:29,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:29,974 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 22 treesize of output 21 [2022-07-13 10:09:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:30,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:30,099 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 13 [2022-07-13 10:09:30,101 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 24 treesize of output 22 [2022-07-13 10:09:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:30,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044641959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:30,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:30,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-13 10:09:30,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779892649] [2022-07-13 10:09:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:30,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:09:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:30,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:09:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:09:30,119 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 10:09:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:30,286 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-13 10:09:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:09:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-07-13 10:09:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:30,288 INFO L225 Difference]: With dead ends: 66 [2022-07-13 10:09:30,288 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 10:09:30,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:09:30,289 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:30,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 192 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 10:09:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2022-07-13 10:09:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 10:09:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-07-13 10:09:30,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2022-07-13 10:09:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:30,297 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-07-13 10:09:30,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 10:09:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-07-13 10:09:30,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 10:09:30,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:30,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:30,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:30,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2022-07-13 10:09:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:30,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163158457] [2022-07-13 10:09:30,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:30,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:30,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:30,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:30,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:30,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163158457] [2022-07-13 10:09:30,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163158457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:30,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253710506] [2022-07-13 10:09:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:30,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:30,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:30,658 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) [2022-07-13 10:09:30,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:09:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:30,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 10:09:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:30,755 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 16 treesize of output 12 [2022-07-13 10:09:30,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:30,809 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 [2022-07-13 10:09:30,857 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 [2022-07-13 10:09:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:09:30,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:30,934 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 13 [2022-07-13 10:09:30,936 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 28 treesize of output 26 [2022-07-13 10:09:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:30,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253710506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:30,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:30,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-13 10:09:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313458871] [2022-07-13 10:09:30,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:09:30,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:30,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:09:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:09:30,981 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 10:09:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:31,403 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-07-13 10:09:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:09:31,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 25 [2022-07-13 10:09:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:31,406 INFO L225 Difference]: With dead ends: 116 [2022-07-13 10:09:31,406 INFO L226 Difference]: Without dead ends: 114 [2022-07-13 10:09:31,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:09:31,407 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 88 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:31,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 375 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 389 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2022-07-13 10:09:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-13 10:09:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2022-07-13 10:09:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 41 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 10:09:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-07-13 10:09:31,416 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2022-07-13 10:09:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:31,416 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-07-13 10:09:31,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 10:09:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-07-13 10:09:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 10:09:31,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:31,418 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 10:09:31,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 10:09:31,627 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,SelfDestructingSolverStorable2 [2022-07-13 10:09:31,628 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:31,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2022-07-13 10:09:31,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:31,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626635608] [2022-07-13 10:09:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:31,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:31,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:31,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:31,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626635608] [2022-07-13 10:09:31,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626635608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61963546] [2022-07-13 10:09:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:31,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:31,821 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) [2022-07-13 10:09:31,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:09:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:31,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:09:31,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:31,915 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 [2022-07-13 10:09:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:31,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:32,040 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 15 [2022-07-13 10:09:32,042 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 30 treesize of output 26 [2022-07-13 10:09:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:32,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61963546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:32,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:32,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-13 10:09:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087642719] [2022-07-13 10:09:32,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:32,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:09:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:09:32,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:09:32,074 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:09:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:32,244 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-13 10:09:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:09:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-13 10:09:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:32,245 INFO L225 Difference]: With dead ends: 108 [2022-07-13 10:09:32,245 INFO L226 Difference]: Without dead ends: 106 [2022-07-13 10:09:32,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:09:32,246 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:32,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 200 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-13 10:09:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2022-07-13 10:09:32,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.3181818181818181) internal successors, (87), 67 states have internal predecessors, (87), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 10:09:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2022-07-13 10:09:32,257 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2022-07-13 10:09:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:32,257 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2022-07-13 10:09:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:09:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2022-07-13 10:09:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 10:09:32,258 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:32,259 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 10:09:32,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-13 10:09:32,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:32,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:32,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:32,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2022-07-13 10:09:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:32,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061322983] [2022-07-13 10:09:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:32,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:32,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:32,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:32,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:32,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061322983] [2022-07-13 10:09:32,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061322983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:32,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836631440] [2022-07-13 10:09:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:32,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:32,604 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) [2022-07-13 10:09:32,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:09:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 10:09:32,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:32,711 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 [2022-07-13 10:09:32,801 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 [2022-07-13 10:09:32,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:32,865 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 15 [2022-07-13 10:09:32,867 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 34 treesize of output 30 [2022-07-13 10:09:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:32,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836631440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:32,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:32,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-13 10:09:32,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917052490] [2022-07-13 10:09:32,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:32,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:09:32,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:32,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:09:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:09:32,926 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:33,389 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2022-07-13 10:09:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:09:33,390 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2022-07-13 10:09:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:33,391 INFO L225 Difference]: With dead ends: 152 [2022-07-13 10:09:33,391 INFO L226 Difference]: Without dead ends: 150 [2022-07-13 10:09:33,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:09:33,392 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 141 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:33,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-13 10:09:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2022-07-13 10:09:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 10:09:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-07-13 10:09:33,401 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-07-13 10:09:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:33,401 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-07-13 10:09:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-07-13 10:09:33,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-13 10:09:33,402 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:33,402 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-13 10:09:33,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:33,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:33,618 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:33,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2022-07-13 10:09:33,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:33,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825357895] [2022-07-13 10:09:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:33,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:33,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:33,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:33,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825357895] [2022-07-13 10:09:33,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825357895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:33,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273603985] [2022-07-13 10:09:33,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:33,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:33,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:33,794 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) [2022-07-13 10:09:33,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:09:33,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 10:09:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:34,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273603985] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:34,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:34,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-13 10:09:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059850267] [2022-07-13 10:09:34,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:34,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:09:34,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:34,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:09:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:09:34,136 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:34,320 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-07-13 10:09:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:09:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 33 [2022-07-13 10:09:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:34,321 INFO L225 Difference]: With dead ends: 104 [2022-07-13 10:09:34,321 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 10:09:34,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-07-13 10:09:34,322 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 238 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:34,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 10:09:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-07-13 10:09:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 10:09:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-07-13 10:09:34,331 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2022-07-13 10:09:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:34,331 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-07-13 10:09:34,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 24 states have internal predecessors, (70), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-07-13 10:09:34,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:09:34,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:34,332 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:34,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:34,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:34,546 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2022-07-13 10:09:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:34,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571213758] [2022-07-13 10:09:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:34,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:34,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:34,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:34,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:34,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571213758] [2022-07-13 10:09:34,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571213758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538101514] [2022-07-13 10:09:34,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:34,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:34,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:34,682 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) [2022-07-13 10:09:34,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:09:34,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:34,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 10:09:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:34,805 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 16 treesize of output 12 [2022-07-13 10:09:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:34,863 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 [2022-07-13 10:09:34,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:34,927 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 24 treesize of output 23 [2022-07-13 10:09:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:34,973 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 24 treesize of output 23 [2022-07-13 10:09:35,022 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 [2022-07-13 10:09:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:35,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:35,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538101514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:35,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:35,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-13 10:09:35,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931947480] [2022-07-13 10:09:35,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:35,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:09:35,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:35,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:09:35,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:09:35,128 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-13 10:09:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:35,639 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-13 10:09:35,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:09:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2022-07-13 10:09:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:35,642 INFO L225 Difference]: With dead ends: 99 [2022-07-13 10:09:35,642 INFO L226 Difference]: Without dead ends: 97 [2022-07-13 10:09:35,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 10:09:35,645 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:35,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 336 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 393 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-07-13 10:09:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-13 10:09:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-07-13 10:09:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 10:09:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-13 10:09:35,659 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2022-07-13 10:09:35,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:35,660 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-13 10:09:35,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-13 10:09:35,660 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-13 10:09:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 10:09:35,663 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:35,664 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:35,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 10:09:35,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:35,876 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2022-07-13 10:09:35,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:35,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197932089] [2022-07-13 10:09:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:35,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:36,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197932089] [2022-07-13 10:09:36,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197932089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:36,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151701355] [2022-07-13 10:09:36,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:36,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:36,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:36,041 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) [2022-07-13 10:09:36,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:09:36,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:09:36,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:36,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:09:36,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:36,108 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 16 treesize of output 12 [2022-07-13 10:09:36,126 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:36,126 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 30 treesize of output 29 [2022-07-13 10:09:36,174 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:09:36,175 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 46 treesize of output 24 [2022-07-13 10:09:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:36,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:36,224 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 15 [2022-07-13 10:09:36,225 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 30 treesize of output 26 [2022-07-13 10:09:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151701355] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:36,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:36,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-07-13 10:09:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479677560] [2022-07-13 10:09:36,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:09:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:09:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:09:36,253 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:09:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:36,485 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2022-07-13 10:09:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:09:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-07-13 10:09:36,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:36,486 INFO L225 Difference]: With dead ends: 158 [2022-07-13 10:09:36,486 INFO L226 Difference]: Without dead ends: 156 [2022-07-13 10:09:36,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:09:36,487 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:36,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-13 10:09:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-07-13 10:09:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.25) internal successors, (80), 64 states have internal predecessors, (80), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-13 10:09:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-13 10:09:36,500 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2022-07-13 10:09:36,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:36,501 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-13 10:09:36,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-13 10:09:36,501 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-13 10:09:36,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 10:09:36,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:36,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:36,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:36,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:36,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2022-07-13 10:09:36,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:36,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771883018] [2022-07-13 10:09:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:36,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:36,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:36,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771883018] [2022-07-13 10:09:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771883018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191007157] [2022-07-13 10:09:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:36,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:36,837 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) [2022-07-13 10:09:36,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:09:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 10:09:36,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:36,987 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 16 treesize of output 12 [2022-07-13 10:09:37,059 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:09:37,059 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 23 treesize of output 22 [2022-07-13 10:09:37,148 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 7 [2022-07-13 10:09:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:39,296 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 17 treesize of output 15 [2022-07-13 10:09:39,298 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 34 treesize of output 30 [2022-07-13 10:09:39,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191007157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:39,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:39,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-13 10:09:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212124879] [2022-07-13 10:09:39,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:39,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:09:39,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:09:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=518, Unknown=1, NotChecked=0, Total=600 [2022-07-13 10:09:39,333 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:09:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:39,905 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2022-07-13 10:09:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 10:09:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-07-13 10:09:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:39,917 INFO L225 Difference]: With dead ends: 214 [2022-07-13 10:09:39,917 INFO L226 Difference]: Without dead ends: 212 [2022-07-13 10:09:39,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=333, Invalid=1922, Unknown=1, NotChecked=0, Total=2256 [2022-07-13 10:09:39,918 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 153 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:39,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 423 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 462 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-07-13 10:09:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-13 10:09:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 101. [2022-07-13 10:09:39,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.275) internal successors, (102), 80 states have internal predecessors, (102), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 10:09:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2022-07-13 10:09:39,944 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 47 [2022-07-13 10:09:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:39,945 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2022-07-13 10:09:39,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:09:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2022-07-13 10:09:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 10:09:39,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:39,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:39,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:40,173 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,SelfDestructingSolverStorable8 [2022-07-13 10:09:40,174 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:40,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2022-07-13 10:09:40,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:40,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441054581] [2022-07-13 10:09:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:40,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:40,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441054581] [2022-07-13 10:09:40,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441054581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940455824] [2022-07-13 10:09:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:09:40,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:40,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:40,376 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) [2022-07-13 10:09:40,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:09:40,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:09:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 10:09:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:40,466 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 [2022-07-13 10:09:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:40,603 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 15 [2022-07-13 10:09:40,604 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 30 treesize of output 26 [2022-07-13 10:09:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940455824] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:40,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:40,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-13 10:09:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251797167] [2022-07-13 10:09:40,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:09:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:09:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:09:40,629 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:09:41,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:41,052 INFO L93 Difference]: Finished difference Result 319 states and 448 transitions. [2022-07-13 10:09:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 10:09:41,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-13 10:09:41,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:41,054 INFO L225 Difference]: With dead ends: 319 [2022-07-13 10:09:41,055 INFO L226 Difference]: Without dead ends: 317 [2022-07-13 10:09:41,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 10:09:41,056 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:41,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 440 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:09:41,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-13 10:09:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 187. [2022-07-13 10:09:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 148 states have internal predecessors, (197), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 10:09:41,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 263 transitions. [2022-07-13 10:09:41,087 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 263 transitions. Word has length 51 [2022-07-13 10:09:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:41,087 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 263 transitions. [2022-07-13 10:09:41,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:09:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 263 transitions. [2022-07-13 10:09:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 10:09:41,088 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:41,088 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:41,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-13 10:09:41,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:09:41,312 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2022-07-13 10:09:41,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037502397] [2022-07-13 10:09:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:41,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:41,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:41,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037502397] [2022-07-13 10:09:41,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037502397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:41,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67047553] [2022-07-13 10:09:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:41,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:41,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:41,540 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) [2022-07-13 10:09:41,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:09:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 10:09:41,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:41,687 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 [2022-07-13 10:09:41,800 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 7 [2022-07-13 10:09:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:41,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:41,887 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 15 [2022-07-13 10:09:41,889 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 34 treesize of output 30 [2022-07-13 10:09:41,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67047553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:41,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:41,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-13 10:09:41,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37475439] [2022-07-13 10:09:41,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:41,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:09:41,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:09:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:09:41,919 INFO L87 Difference]: Start difference. First operand 187 states and 263 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:09:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:42,964 INFO L93 Difference]: Finished difference Result 325 states and 440 transitions. [2022-07-13 10:09:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 10:09:42,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2022-07-13 10:09:42,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:42,967 INFO L225 Difference]: With dead ends: 325 [2022-07-13 10:09:42,967 INFO L226 Difference]: Without dead ends: 323 [2022-07-13 10:09:42,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=425, Invalid=2331, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 10:09:42,969 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 174 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:42,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 480 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 10:09:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-13 10:09:42,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 115. [2022-07-13 10:09:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 94 states have internal predecessors, (117), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-13 10:09:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2022-07-13 10:09:42,993 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 51 [2022-07-13 10:09:42,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:42,993 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2022-07-13 10:09:42,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 20 states have internal predecessors, (69), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:09:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2022-07-13 10:09:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 10:09:42,994 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:42,995 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:43,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:43,211 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,SelfDestructingSolverStorable10 [2022-07-13 10:09:43,212 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2022-07-13 10:09:43,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:43,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802750342] [2022-07-13 10:09:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:43,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:43,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802750342] [2022-07-13 10:09:43,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802750342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228301275] [2022-07-13 10:09:43,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:09:43,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:43,504 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) [2022-07-13 10:09:43,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:09:43,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 10:09:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 10:09:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:43,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:44,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228301275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:44,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:44,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-13 10:09:44,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584030314] [2022-07-13 10:09:44,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:44,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 10:09:44,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:44,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 10:09:44,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 10:09:44,143 INFO L87 Difference]: Start difference. First operand 115 states and 147 transitions. Second operand has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:09:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:44,383 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2022-07-13 10:09:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 10:09:44,384 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 55 [2022-07-13 10:09:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:44,385 INFO L225 Difference]: With dead ends: 179 [2022-07-13 10:09:44,385 INFO L226 Difference]: Without dead ends: 155 [2022-07-13 10:09:44,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 10:09:44,386 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 236 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:44,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 123 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-13 10:09:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2022-07-13 10:09:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.2254901960784315) internal successors, (125), 102 states have internal predecessors, (125), 17 states have call successors, (17), 5 states have call predecessors, (17), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-13 10:09:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-13 10:09:44,402 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 55 [2022-07-13 10:09:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:44,402 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-13 10:09:44,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.323529411764706) internal successors, (113), 34 states have internal predecessors, (113), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:09:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-13 10:09:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:09:44,403 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:44,403 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2022-07-13 10:09:44,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:44,607 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,SelfDestructingSolverStorable11 [2022-07-13 10:09:44,607 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1543341178, now seen corresponding path program 2 times [2022-07-13 10:09:44,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164783169] [2022-07-13 10:09:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:44,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:44,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164783169] [2022-07-13 10:09:44,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164783169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:44,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848899699] [2022-07-13 10:09:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:44,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:44,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:44,729 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) [2022-07-13 10:09:44,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:09:44,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:44,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:09:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:44,806 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 16 treesize of output 12 [2022-07-13 10:09:44,829 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:44,829 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 30 treesize of output 29 [2022-07-13 10:09:44,879 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:44,880 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 30 treesize of output 29 [2022-07-13 10:09:44,910 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:44,910 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 30 treesize of output 29 [2022-07-13 10:09:44,966 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:09:44,966 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 46 treesize of output 24 [2022-07-13 10:09:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:44,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:45,085 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 18 treesize of output 16 [2022-07-13 10:09:45,087 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 36 treesize of output 32 [2022-07-13 10:09:45,117 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:45,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848899699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:45,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:45,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-13 10:09:45,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092622037] [2022-07-13 10:09:45,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:45,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 10:09:45,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:45,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 10:09:45,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-13 10:09:45,118 INFO L87 Difference]: Start difference. First operand 125 states and 159 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:09:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:45,373 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-07-13 10:09:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 10:09:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-13 10:09:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:45,374 INFO L225 Difference]: With dead ends: 192 [2022-07-13 10:09:45,374 INFO L226 Difference]: Without dead ends: 190 [2022-07-13 10:09:45,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:09:45,375 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:45,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 337 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 346 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-13 10:09:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-13 10:09:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2022-07-13 10:09:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.2627118644067796) internal successors, (149), 118 states have internal predecessors, (149), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 10:09:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-07-13 10:09:45,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 61 [2022-07-13 10:09:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:45,395 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-07-13 10:09:45,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:09:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-07-13 10:09:45,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:09:45,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:45,396 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2022-07-13 10:09:45,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:45,613 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,SelfDestructingSolverStorable12 [2022-07-13 10:09:45,613 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1471762440, now seen corresponding path program 1 times [2022-07-13 10:09:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:45,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39081412] [2022-07-13 10:09:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:45,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39081412] [2022-07-13 10:09:45,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39081412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:45,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451632329] [2022-07-13 10:09:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:45,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:45,725 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) [2022-07-13 10:09:45,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:09:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 10:09:45,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:45,806 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 16 treesize of output 12 [2022-07-13 10:09:45,826 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:45,827 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 30 treesize of output 29 [2022-07-13 10:09:45,878 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:45,878 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 30 treesize of output 29 [2022-07-13 10:09:45,913 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:45,914 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 30 treesize of output 29 [2022-07-13 10:09:45,980 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:09:45,981 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 46 treesize of output 24 [2022-07-13 10:09:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:45,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:46,096 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 18 treesize of output 16 [2022-07-13 10:09:46,098 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 36 treesize of output 32 [2022-07-13 10:09:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:46,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451632329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:46,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:46,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-13 10:09:46,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617136670] [2022-07-13 10:09:46,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:46,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-13 10:09:46,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-13 10:09:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-13 10:09:46,130 INFO L87 Difference]: Start difference. First operand 147 states and 195 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:09:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:46,409 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-07-13 10:09:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 10:09:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2022-07-13 10:09:46,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:46,411 INFO L225 Difference]: With dead ends: 213 [2022-07-13 10:09:46,411 INFO L226 Difference]: Without dead ends: 211 [2022-07-13 10:09:46,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:09:46,412 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 44 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:46,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 341 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 363 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-07-13 10:09:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-13 10:09:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2022-07-13 10:09:46,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 122 states have (on average 1.2704918032786885) internal successors, (155), 122 states have internal predecessors, (155), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-13 10:09:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-07-13 10:09:46,433 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 61 [2022-07-13 10:09:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:46,433 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-07-13 10:09:46,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 7 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-13 10:09:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-07-13 10:09:46,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-13 10:09:46,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:46,434 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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] [2022-07-13 10:09:46,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:46,647 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,SelfDestructingSolverStorable13 [2022-07-13 10:09:46,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:46,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 3 times [2022-07-13 10:09:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:46,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039265394] [2022-07-13 10:09:46,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:46,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:46,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039265394] [2022-07-13 10:09:46,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039265394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591773551] [2022-07-13 10:09:46,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:46,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:46,802 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) [2022-07-13 10:09:46,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:09:46,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 10:09:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:46,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:09:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:46,984 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 16 treesize of output 12 [2022-07-13 10:09:47,043 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:47,043 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 29 treesize of output 28 [2022-07-13 10:09:47,103 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:09:47,103 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 25 [2022-07-13 10:09:47,147 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:09:47,148 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 25 [2022-07-13 10:09:47,243 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 7 [2022-07-13 10:09:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:09:47,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:49,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591773551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:49,391 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:49,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-13 10:09:49,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590787412] [2022-07-13 10:09:49,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:49,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 10:09:49,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:49,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 10:09:49,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2022-07-13 10:09:49,392 INFO L87 Difference]: Start difference. First operand 151 states and 201 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-13 10:09:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:50,000 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2022-07-13 10:09:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 10:09:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) Word has length 61 [2022-07-13 10:09:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:50,002 INFO L225 Difference]: With dead ends: 222 [2022-07-13 10:09:50,002 INFO L226 Difference]: Without dead ends: 220 [2022-07-13 10:09:50,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=366, Invalid=2183, Unknown=1, NotChecked=0, Total=2550 [2022-07-13 10:09:50,003 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:50,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 502 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 649 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-13 10:09:50,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-13 10:09:50,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 101. [2022-07-13 10:09:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.2222222222222223) internal successors, (99), 81 states have internal predecessors, (99), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-13 10:09:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-07-13 10:09:50,020 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 61 [2022-07-13 10:09:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:50,021 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-07-13 10:09:50,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 9 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2022-07-13 10:09:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-07-13 10:09:50,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 10:09:50,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:50,022 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:50,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:50,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:50,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2022-07-13 10:09:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:50,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283506874] [2022-07-13 10:09:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:50,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:50,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283506874] [2022-07-13 10:09:50,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283506874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225558179] [2022-07-13 10:09:50,362 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:09:50,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:50,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:50,363 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) [2022-07-13 10:09:50,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:09:50,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 10:09:50,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:09:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:50,493 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 16 treesize of output 12 [2022-07-13 10:09:50,512 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:09:50,513 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 30 treesize of output 29 [2022-07-13 10:09:50,615 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:09:50,616 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 46 treesize of output 24 [2022-07-13 10:09:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:50,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:50,687 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 15 [2022-07-13 10:09:50,689 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 30 treesize of output 26 [2022-07-13 10:09:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225558179] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:50,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:50,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-13 10:09:50,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641307090] [2022-07-13 10:09:50,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:09:50,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:50,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:09:50,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-13 10:09:50,732 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 10:09:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:51,622 INFO L93 Difference]: Finished difference Result 552 states and 806 transitions. [2022-07-13 10:09:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-13 10:09:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 69 [2022-07-13 10:09:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:51,625 INFO L225 Difference]: With dead ends: 552 [2022-07-13 10:09:51,625 INFO L226 Difference]: Without dead ends: 550 [2022-07-13 10:09:51,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 138 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2022-07-13 10:09:51,626 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:51,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 514 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:09:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-13 10:09:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 163. [2022-07-13 10:09:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.3046875) internal successors, (167), 128 states have internal predecessors, (167), 29 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-13 10:09:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-07-13 10:09:51,667 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 69 [2022-07-13 10:09:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:51,668 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-07-13 10:09:51,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.055555555555555) internal successors, (73), 18 states have internal predecessors, (73), 5 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-13 10:09:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-07-13 10:09:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 10:09:51,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:51,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:51,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:51,884 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,SelfDestructingSolverStorable15 [2022-07-13 10:09:51,884 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 4 times [2022-07-13 10:09:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838147040] [2022-07-13 10:09:51,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:51,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:52,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838147040] [2022-07-13 10:09:52,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838147040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:52,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705063286] [2022-07-13 10:09:52,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:09:52,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:52,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:52,035 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) [2022-07-13 10:09:52,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:09:52,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:09:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 10:09:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:52,198 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 16 treesize of output 12 [2022-07-13 10:09:52,261 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:09:52,262 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 23 treesize of output 22 [2022-07-13 10:09:52,410 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 7 [2022-07-13 10:09:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 10:09:52,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:54,569 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 15 [2022-07-13 10:09:54,571 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 34 treesize of output 30 [2022-07-13 10:09:54,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705063286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:54,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:54,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 10:09:54,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071903065] [2022-07-13 10:09:54,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:54,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:09:54,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:54,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:09:54,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2022-07-13 10:09:54,616 INFO L87 Difference]: Start difference. First operand 163 states and 225 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-13 10:09:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:56,347 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-07-13 10:09:56,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-13 10:09:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 69 [2022-07-13 10:09:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:56,359 INFO L225 Difference]: With dead ends: 697 [2022-07-13 10:09:56,359 INFO L226 Difference]: Without dead ends: 695 [2022-07-13 10:09:56,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=867, Invalid=7874, Unknown=1, NotChecked=0, Total=8742 [2022-07-13 10:09:56,361 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 332 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:56,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 813 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1515 Invalid, 0 Unknown, 115 Unchecked, 0.8s Time] [2022-07-13 10:09:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-13 10:09:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 196. [2022-07-13 10:09:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 152 states have (on average 1.3157894736842106) internal successors, (200), 152 states have internal predecessors, (200), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-13 10:09:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-07-13 10:09:56,405 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 69 [2022-07-13 10:09:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:56,405 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-07-13 10:09:56,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-07-13 10:09:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-07-13 10:09:56,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 10:09:56,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:56,407 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:56,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-13 10:09:56,623 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,SelfDestructingSolverStorable16 [2022-07-13 10:09:56,623 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2022-07-13 10:09:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:56,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894407436] [2022-07-13 10:09:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:56,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894407436] [2022-07-13 10:09:56,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894407436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:56,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325922101] [2022-07-13 10:09:56,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:09:56,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:56,773 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) [2022-07-13 10:09:56,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:09:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:09:56,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:56,899 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 16 treesize of output 12 [2022-07-13 10:09:57,028 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:09:57,029 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 46 treesize of output 24 [2022-07-13 10:09:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:57,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:57,099 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 15 [2022-07-13 10:09:57,102 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 30 treesize of output 26 [2022-07-13 10:09:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:57,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325922101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:57,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:57,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-13 10:09:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962984973] [2022-07-13 10:09:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:09:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:09:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:09:57,150 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:59,225 INFO L93 Difference]: Finished difference Result 1725 states and 2618 transitions. [2022-07-13 10:09:59,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-13 10:09:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2022-07-13 10:09:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:59,232 INFO L225 Difference]: With dead ends: 1725 [2022-07-13 10:09:59,232 INFO L226 Difference]: Without dead ends: 1723 [2022-07-13 10:09:59,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=786, Invalid=6354, Unknown=0, NotChecked=0, Total=7140 [2022-07-13 10:09:59,234 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 192 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:59,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1071 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 10:09:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-07-13 10:09:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 406. [2022-07-13 10:09:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 314 states have (on average 1.375796178343949) internal successors, (432), 314 states have internal predecessors, (432), 83 states have call successors, (83), 8 states have call predecessors, (83), 8 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-13 10:09:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 598 transitions. [2022-07-13 10:09:59,347 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 598 transitions. Word has length 73 [2022-07-13 10:09:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:59,347 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 598 transitions. [2022-07-13 10:09:59,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-13 10:09:59,348 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 598 transitions. [2022-07-13 10:09:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 10:09:59,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:59,350 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:59,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-13 10:09:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 10:09:59,564 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2022-07-13 10:09:59,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:59,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529437050] [2022-07-13 10:09:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:59,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:09:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:09:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:09:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:59,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529437050] [2022-07-13 10:09:59,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529437050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:59,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158925081] [2022-07-13 10:09:59,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:59,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:59,715 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) [2022-07-13 10:09:59,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:09:59,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:59,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:59,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-13 10:09:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:59,916 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 [2022-07-13 10:10:00,077 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 7 [2022-07-13 10:10:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:00,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:00,248 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 15 [2022-07-13 10:10:00,250 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 34 treesize of output 30 [2022-07-13 10:10:00,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158925081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:00,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:00,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-07-13 10:10:00,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341157913] [2022-07-13 10:10:00,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:10:00,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:00,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:10:00,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 10:10:00,284 INFO L87 Difference]: Start difference. First operand 406 states and 598 transitions. Second operand has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:02,765 INFO L93 Difference]: Finished difference Result 1238 states and 1848 transitions. [2022-07-13 10:10:02,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-13 10:10:02,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2022-07-13 10:10:02,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:02,769 INFO L225 Difference]: With dead ends: 1238 [2022-07-13 10:10:02,769 INFO L226 Difference]: Without dead ends: 1236 [2022-07-13 10:10:02,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1163, Invalid=8539, Unknown=0, NotChecked=0, Total=9702 [2022-07-13 10:10:02,772 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 268 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:02,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 812 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 1575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 10:10:02,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-07-13 10:10:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 218. [2022-07-13 10:10:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 174 states have (on average 1.2816091954022988) internal successors, (223), 174 states have internal predecessors, (223), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-07-13 10:10:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2022-07-13 10:10:02,834 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 73 [2022-07-13 10:10:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:02,835 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2022-07-13 10:10:02,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 27 states have internal predecessors, (97), 6 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2022-07-13 10:10:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 10:10:02,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:02,836 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:02,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:03,051 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2022-07-13 10:10:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:03,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299643415] [2022-07-13 10:10:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:03,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299643415] [2022-07-13 10:10:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299643415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919939205] [2022-07-13 10:10:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:03,344 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) [2022-07-13 10:10:03,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 10:10:03,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:03,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 10:10:03,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:03,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:04,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919939205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:04,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:04,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-07-13 10:10:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215591903] [2022-07-13 10:10:04,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:04,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-13 10:10:04,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:04,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-13 10:10:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 10:10:04,158 INFO L87 Difference]: Start difference. First operand 218 states and 293 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-13 10:10:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:04,541 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2022-07-13 10:10:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 10:10:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 77 [2022-07-13 10:10:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:04,542 INFO L225 Difference]: With dead ends: 298 [2022-07-13 10:10:04,542 INFO L226 Difference]: Without dead ends: 266 [2022-07-13 10:10:04,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=1908, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 10:10:04,544 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 255 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:04,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 180 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-13 10:10:04,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-07-13 10:10:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 186 states have (on average 1.2634408602150538) internal successors, (235), 186 states have internal predecessors, (235), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-13 10:10:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2022-07-13 10:10:04,602 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 77 [2022-07-13 10:10:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:04,602 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2022-07-13 10:10:04,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-13 10:10:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2022-07-13 10:10:04,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:10:04,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:04,603 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:04,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:04,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:04,819 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:04,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2022-07-13 10:10:04,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:04,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117606587] [2022-07-13 10:10:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:04,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:04,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:04,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117606587] [2022-07-13 10:10:04,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117606587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305598640] [2022-07-13 10:10:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:10:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:04,992 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) [2022-07-13 10:10:05,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 10:10:05,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 10:10:05,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:05,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:10:05,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:05,216 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 16 treesize of output 12 [2022-07-13 10:10:05,238 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:05,239 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 30 treesize of output 29 [2022-07-13 10:10:05,403 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:10:05,403 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 46 treesize of output 24 [2022-07-13 10:10:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:05,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:05,498 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 15 [2022-07-13 10:10:05,499 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 30 treesize of output 26 [2022-07-13 10:10:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:05,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305598640] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:05,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:05,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-13 10:10:05,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831158308] [2022-07-13 10:10:05,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:05,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:10:05,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:05,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:10:05,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:10:05,581 INFO L87 Difference]: Start difference. First operand 233 states and 311 transitions. Second operand has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:10:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:10,025 INFO L93 Difference]: Finished difference Result 3600 states and 5511 transitions. [2022-07-13 10:10:10,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-07-13 10:10:10,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 91 [2022-07-13 10:10:10,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:10,036 INFO L225 Difference]: With dead ends: 3600 [2022-07-13 10:10:10,036 INFO L226 Difference]: Without dead ends: 3598 [2022-07-13 10:10:10,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8611 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2022-07-13 10:10:10,039 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 191 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 4570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:10,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1516 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 10:10:10,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-13 10:10:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 458. [2022-07-13 10:10:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 360 states have (on average 1.3472222222222223) internal successors, (485), 360 states have internal predecessors, (485), 89 states have call successors, (89), 8 states have call predecessors, (89), 8 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-07-13 10:10:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 663 transitions. [2022-07-13 10:10:10,234 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 663 transitions. Word has length 91 [2022-07-13 10:10:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:10,234 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 663 transitions. [2022-07-13 10:10:10,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.130434782608695) internal successors, (95), 23 states have internal predecessors, (95), 6 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:10:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 663 transitions. [2022-07-13 10:10:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:10:10,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:10,236 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:10,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:10,452 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,SelfDestructingSolverStorable20 [2022-07-13 10:10:10,453 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 5 times [2022-07-13 10:10:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:10,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054476705] [2022-07-13 10:10:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:10,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:10,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054476705] [2022-07-13 10:10:10,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054476705] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:10,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783356488] [2022-07-13 10:10:10,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:10:10,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:10,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:10,682 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) [2022-07-13 10:10:10,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 10:10:10,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-13 10:10:10,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:10,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:10:10,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:10,997 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 16 treesize of output 12 [2022-07-13 10:10:11,066 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:10:11,066 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 23 treesize of output 22 [2022-07-13 10:10:11,298 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 7 [2022-07-13 10:10:11,319 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 10:10:11,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:11,532 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 15 [2022-07-13 10:10:11,534 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 34 treesize of output 30 [2022-07-13 10:10:11,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783356488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:11,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:11,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-13 10:10:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584767231] [2022-07-13 10:10:11,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:11,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 10:10:11,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 10:10:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2022-07-13 10:10:11,569 INFO L87 Difference]: Start difference. First operand 458 states and 663 transitions. Second operand has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-13 10:10:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:16,412 INFO L93 Difference]: Finished difference Result 1812 states and 2691 transitions. [2022-07-13 10:10:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 10:10:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) Word has length 91 [2022-07-13 10:10:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:16,418 INFO L225 Difference]: With dead ends: 1812 [2022-07-13 10:10:16,418 INFO L226 Difference]: Without dead ends: 1810 [2022-07-13 10:10:16,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1117, Invalid=13402, Unknown=1, NotChecked=0, Total=14520 [2022-07-13 10:10:16,419 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 390 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:16,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1259 Invalid, 2938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 2228 Invalid, 0 Unknown, 164 Unchecked, 1.0s Time] [2022-07-13 10:10:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-07-13 10:10:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 443. [2022-07-13 10:10:16,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 348 states have (on average 1.3333333333333333) internal successors, (464), 348 states have internal predecessors, (464), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-13 10:10:16,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 630 transitions. [2022-07-13 10:10:16,572 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 630 transitions. Word has length 91 [2022-07-13 10:10:16,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:16,572 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 630 transitions. [2022-07-13 10:10:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.71875) internal successors, (119), 32 states have internal predecessors, (119), 10 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 10 states have call predecessors, (16), 10 states have call successors, (16) [2022-07-13 10:10:16,572 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 630 transitions. [2022-07-13 10:10:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:10:16,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:16,574 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:16,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:16,799 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,SelfDestructingSolverStorable21 [2022-07-13 10:10:16,799 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:16,800 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2022-07-13 10:10:16,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:16,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214033686] [2022-07-13 10:10:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:16,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:16,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214033686] [2022-07-13 10:10:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214033686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303067788] [2022-07-13 10:10:16,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:10:16,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:16,959 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) [2022-07-13 10:10:16,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 10:10:17,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:10:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:17,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:10:17,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:17,097 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 16 treesize of output 12 [2022-07-13 10:10:17,321 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:10:17,321 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 46 treesize of output 24 [2022-07-13 10:10:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:17,404 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 15 [2022-07-13 10:10:17,405 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 30 treesize of output 26 [2022-07-13 10:10:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:17,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303067788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:17,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:17,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2022-07-13 10:10:17,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584192537] [2022-07-13 10:10:17,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 10:10:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 10:10:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:10:17,467 INFO L87 Difference]: Start difference. First operand 443 states and 630 transitions. Second operand has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:28,697 INFO L93 Difference]: Finished difference Result 12950 states and 20137 transitions. [2022-07-13 10:10:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-07-13 10:10:28,697 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 95 [2022-07-13 10:10:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:28,745 INFO L225 Difference]: With dead ends: 12950 [2022-07-13 10:10:28,745 INFO L226 Difference]: Without dead ends: 12948 [2022-07-13 10:10:28,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32066 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2022-07-13 10:10:28,753 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 427 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 7857 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 9250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1393 IncrementalHoareTripleChecker+Valid, 7857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:28,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2732 Invalid, 9250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 7857 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-13 10:10:28,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2022-07-13 10:10:29,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 1173. [2022-07-13 10:10:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 904 states have (on average 1.4092920353982301) internal successors, (1274), 904 states have internal predecessors, (1274), 257 states have call successors, (257), 11 states have call predecessors, (257), 11 states have return successors, (257), 257 states have call predecessors, (257), 257 states have call successors, (257) [2022-07-13 10:10:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1788 transitions. [2022-07-13 10:10:29,387 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1788 transitions. Word has length 95 [2022-07-13 10:10:29,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:29,387 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1788 transitions. [2022-07-13 10:10:29,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.0) internal successors, (100), 25 states have internal predecessors, (100), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:29,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1788 transitions. [2022-07-13 10:10:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:10:29,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:29,390 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:29,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-13 10:10:29,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:29,607 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2022-07-13 10:10:29,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309196164] [2022-07-13 10:10:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:29,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309196164] [2022-07-13 10:10:29,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309196164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104794896] [2022-07-13 10:10:29,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:10:29,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:29,808 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) [2022-07-13 10:10:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 10:10:30,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 10:10:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:10:30,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:30,199 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 [2022-07-13 10:10:30,520 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 19 treesize of output 7 [2022-07-13 10:10:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:30,746 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 15 [2022-07-13 10:10:30,748 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 34 treesize of output 30 [2022-07-13 10:10:30,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104794896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:30,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:30,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-07-13 10:10:30,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273356076] [2022-07-13 10:10:30,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:30,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-13 10:10:30,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:30,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-13 10:10:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 10:10:30,780 INFO L87 Difference]: Start difference. First operand 1173 states and 1788 transitions. Second operand has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-13 10:10:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:36,337 INFO L93 Difference]: Finished difference Result 4311 states and 6644 transitions. [2022-07-13 10:10:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-13 10:10:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 95 [2022-07-13 10:10:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:36,367 INFO L225 Difference]: With dead ends: 4311 [2022-07-13 10:10:36,367 INFO L226 Difference]: Without dead ends: 4309 [2022-07-13 10:10:36,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1973, Invalid=17767, Unknown=0, NotChecked=0, Total=19740 [2022-07-13 10:10:36,369 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 378 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:36,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1380 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 10:10:36,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2022-07-13 10:10:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 473. [2022-07-13 10:10:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 378 states have (on average 1.3095238095238095) internal successors, (495), 378 states have internal predecessors, (495), 83 states have call successors, (83), 11 states have call predecessors, (83), 11 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-07-13 10:10:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 661 transitions. [2022-07-13 10:10:36,710 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 661 transitions. Word has length 95 [2022-07-13 10:10:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:36,710 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 661 transitions. [2022-07-13 10:10:36,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.787878787878788) internal successors, (125), 33 states have internal predecessors, (125), 8 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-07-13 10:10:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 661 transitions. [2022-07-13 10:10:36,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 10:10:36,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:36,713 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:36,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:36,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:36,913 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:36,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:36,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1499687394, now seen corresponding path program 6 times [2022-07-13 10:10:36,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:36,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580843227] [2022-07-13 10:10:36,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:36,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:10:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:10:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:10:37,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580843227] [2022-07-13 10:10:37,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580843227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774519086] [2022-07-13 10:10:37,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:10:37,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:37,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:37,142 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) [2022-07-13 10:10:37,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-13 10:10:37,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-13 10:10:37,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:37,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:10:37,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:37,440 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 16 treesize of output 12 [2022-07-13 10:10:37,503 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:37,504 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 29 treesize of output 28 [2022-07-13 10:10:37,573 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:10:37,573 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 25 [2022-07-13 10:10:37,623 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:10:37,624 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 25 [2022-07-13 10:10:37,707 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:10:37,708 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 25 [2022-07-13 10:10:37,764 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:10:37,765 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 25 [2022-07-13 10:10:37,941 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 7 [2022-07-13 10:10:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-13 10:10:37,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:38,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774519086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:38,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:38,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-13 10:10:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787921295] [2022-07-13 10:10:38,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:10:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:10:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2022-07-13 10:10:38,634 INFO L87 Difference]: Start difference. First operand 473 states and 661 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-13 10:10:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:40,373 INFO L93 Difference]: Finished difference Result 853 states and 1173 transitions. [2022-07-13 10:10:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-13 10:10:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) Word has length 97 [2022-07-13 10:10:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:40,376 INFO L225 Difference]: With dead ends: 853 [2022-07-13 10:10:40,376 INFO L226 Difference]: Without dead ends: 851 [2022-07-13 10:10:40,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=694, Invalid=6787, Unknown=1, NotChecked=0, Total=7482 [2022-07-13 10:10:40,377 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 231 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:40,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 820 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1325 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2022-07-13 10:10:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-07-13 10:10:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 319. [2022-07-13 10:10:40,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 252 states have (on average 1.2817460317460319) internal successors, (323), 252 states have internal predecessors, (323), 53 states have call successors, (53), 13 states have call predecessors, (53), 13 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-13 10:10:40,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 429 transitions. [2022-07-13 10:10:40,594 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 429 transitions. Word has length 97 [2022-07-13 10:10:40,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:40,594 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 429 transitions. [2022-07-13 10:10:40,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 30 states have internal predecessors, (115), 13 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 13 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-13 10:10:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 429 transitions. [2022-07-13 10:10:40,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 10:10:40,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:40,596 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:40,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:40,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-13 10:10:40,823 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:40,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2022-07-13 10:10:40,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:40,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809942822] [2022-07-13 10:10:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:40,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:41,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:41,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809942822] [2022-07-13 10:10:41,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809942822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:41,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981387908] [2022-07-13 10:10:41,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:10:41,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:41,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:41,200 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:41,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-13 10:10:41,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-13 10:10:41,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:41,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-13 10:10:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:41,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:10:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981387908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:42,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:42,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-13 10:10:42,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769570983] [2022-07-13 10:10:42,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:42,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-13 10:10:42,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:42,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-13 10:10:42,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-13 10:10:42,315 INFO L87 Difference]: Start difference. First operand 319 states and 429 transitions. Second operand has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-13 10:10:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:43,038 INFO L93 Difference]: Finished difference Result 423 states and 569 transitions. [2022-07-13 10:10:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 10:10:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) Word has length 99 [2022-07-13 10:10:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:43,040 INFO L225 Difference]: With dead ends: 423 [2022-07-13 10:10:43,040 INFO L226 Difference]: Without dead ends: 383 [2022-07-13 10:10:43,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-13 10:10:43,042 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 443 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:43,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 229 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-13 10:10:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2022-07-13 10:10:43,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 268 states have (on average 1.2649253731343284) internal successors, (339), 268 states have internal predecessors, (339), 57 states have call successors, (57), 13 states have call predecessors, (57), 13 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-07-13 10:10:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 453 transitions. [2022-07-13 10:10:43,300 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 453 transitions. Word has length 99 [2022-07-13 10:10:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:43,300 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 453 transitions. [2022-07-13 10:10:43,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.7884615384615383) internal successors, (197), 52 states have internal predecessors, (197), 12 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2022-07-13 10:10:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 453 transitions. [2022-07-13 10:10:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 10:10:43,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:43,302 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:43,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-13 10:10:43,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2022-07-13 10:10:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743610616] [2022-07-13 10:10:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:43,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:10:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:10:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:10:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:10:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:10:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:10:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:10:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:10:43,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:43,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743610616] [2022-07-13 10:10:43,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743610616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040871234] [2022-07-13 10:10:43,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:10:43,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:43,712 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:43,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-13 10:10:44,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-13 10:10:44,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:10:44,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:44,094 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 16 treesize of output 12 [2022-07-13 10:10:44,115 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:44,116 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 30 treesize of output 29 [2022-07-13 10:10:44,354 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:10:44,354 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 46 treesize of output 24 [2022-07-13 10:10:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:10:44,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:44,465 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 15 [2022-07-13 10:10:44,467 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 30 treesize of output 26 [2022-07-13 10:10:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:10:44,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040871234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:44,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:44,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2022-07-13 10:10:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409558304] [2022-07-13 10:10:44,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:44,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 10:10:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:44,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 10:10:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-07-13 10:10:44,550 INFO L87 Difference]: Start difference. First operand 339 states and 453 transitions. Second operand has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-13 10:11:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:19,595 INFO L93 Difference]: Finished difference Result 16750 states and 25950 transitions. [2022-07-13 10:11:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2022-07-13 10:11:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 113 [2022-07-13 10:11:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:19,624 INFO L225 Difference]: With dead ends: 16750 [2022-07-13 10:11:19,625 INFO L226 Difference]: Without dead ends: 16748 [2022-07-13 10:11:19,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112803 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=14055, Invalid=225555, Unknown=0, NotChecked=0, Total=239610 [2022-07-13 10:11:19,638 INFO L413 NwaCegarLoop]: 711 mSDtfsCounter, 637 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 13568 mSolverCounterSat, 2664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 3853 SdHoareTripleChecker+Invalid, 16232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2664 IncrementalHoareTripleChecker+Valid, 13568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:19,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 3853 Invalid, 16232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2664 Valid, 13568 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-13 10:11:19,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16748 states. [2022-07-13 10:11:20,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16748 to 735. [2022-07-13 10:11:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 572 states have (on average 1.3636363636363635) internal successors, (780), 572 states have internal predecessors, (780), 149 states have call successors, (149), 13 states have call predecessors, (149), 13 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2022-07-13 10:11:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1078 transitions. [2022-07-13 10:11:20,734 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1078 transitions. Word has length 113 [2022-07-13 10:11:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:20,735 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1078 transitions. [2022-07-13 10:11:20,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.178571428571429) internal successors, (117), 28 states have internal predecessors, (117), 7 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-13 10:11:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1078 transitions. [2022-07-13 10:11:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-13 10:11:20,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:20,737 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:20,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:20,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-13 10:11:20,947 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash -754935820, now seen corresponding path program 7 times [2022-07-13 10:11:20,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:20,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755305341] [2022-07-13 10:11:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:20,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:11:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:11:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:11:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:11:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:11:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:11:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:11:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:11:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:11:21,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:21,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755305341] [2022-07-13 10:11:21,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755305341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:21,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719688819] [2022-07-13 10:11:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:11:21,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:21,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:21,192 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:21,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-13 10:11:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 10:11:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:21,505 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 16 treesize of output 12 [2022-07-13 10:11:21,577 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:21,577 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 23 treesize of output 22 [2022-07-13 10:11:21,887 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 7 [2022-07-13 10:11:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:11:21,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:22,186 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 15 [2022-07-13 10:11:22,188 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 34 treesize of output 30 [2022-07-13 10:11:22,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719688819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:22,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:22,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-07-13 10:11:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681777568] [2022-07-13 10:11:22,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 10:11:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 10:11:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2163, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 10:11:22,226 INFO L87 Difference]: Start difference. First operand 735 states and 1078 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-13 10:11:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:28,440 INFO L93 Difference]: Finished difference Result 1648 states and 2405 transitions. [2022-07-13 10:11:28,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-13 10:11:28,441 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 113 [2022-07-13 10:11:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:28,444 INFO L225 Difference]: With dead ends: 1648 [2022-07-13 10:11:28,444 INFO L226 Difference]: Without dead ends: 1646 [2022-07-13 10:11:28,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1026, Invalid=14473, Unknown=1, NotChecked=0, Total=15500 [2022-07-13 10:11:28,445 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 323 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:28,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1492 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2441 Invalid, 0 Unknown, 163 Unchecked, 0.9s Time] [2022-07-13 10:11:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-13 10:11:29,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 531. [2022-07-13 10:11:29,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 412 states have (on average 1.3009708737864079) internal successors, (536), 420 states have internal predecessors, (536), 101 states have call successors, (101), 17 states have call predecessors, (101), 17 states have return successors, (101), 93 states have call predecessors, (101), 101 states have call successors, (101) [2022-07-13 10:11:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 738 transitions. [2022-07-13 10:11:29,015 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 738 transitions. Word has length 113 [2022-07-13 10:11:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:29,015 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 738 transitions. [2022-07-13 10:11:29,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 12 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2022-07-13 10:11:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 738 transitions. [2022-07-13 10:11:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-13 10:11:29,017 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:29,017 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:29,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:29,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-13 10:11:29,233 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1171866264, now seen corresponding path program 13 times [2022-07-13 10:11:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:29,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957501651] [2022-07-13 10:11:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:29,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:11:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:11:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:11:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:11:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:11:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:11:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:11:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:11:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:11:29,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957501651] [2022-07-13 10:11:29,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957501651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082397782] [2022-07-13 10:11:29,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:11:29,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:29,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:29,452 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:29,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-13 10:11:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:11:29,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:29,629 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 16 treesize of output 12 [2022-07-13 10:11:29,892 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:11:29,893 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 46 treesize of output 24 [2022-07-13 10:11:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:11:29,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:29,993 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 15 [2022-07-13 10:11:29,995 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 30 treesize of output 26 [2022-07-13 10:11:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:11:30,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082397782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:30,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:30,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-07-13 10:11:30,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987007962] [2022-07-13 10:11:30,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:11:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:11:30,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:11:30,079 INFO L87 Difference]: Start difference. First operand 531 states and 738 transitions. Second operand has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 10:13:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:13:38,827 INFO L93 Difference]: Finished difference Result 60525 states and 94471 transitions. [2022-07-13 10:13:38,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 924 states. [2022-07-13 10:13:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 117 [2022-07-13 10:13:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:13:38,947 INFO L225 Difference]: With dead ends: 60525 [2022-07-13 10:13:38,947 INFO L226 Difference]: Without dead ends: 60523 [2022-07-13 10:13:38,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 237 SyntacticMatches, 7 SemanticMatches, 930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424502 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=39010, Invalid=828682, Unknown=0, NotChecked=0, Total=867692 [2022-07-13 10:13:39,000 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 1145 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 28946 mSolverCounterSat, 5780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 7203 SdHoareTripleChecker+Invalid, 34726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5780 IncrementalHoareTripleChecker+Valid, 28946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:13:39,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 7203 Invalid, 34726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5780 Valid, 28946 Invalid, 0 Unknown, 0 Unchecked, 13.4s Time] [2022-07-13 10:13:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60523 states. [2022-07-13 10:13:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60523 to 1699. [2022-07-13 10:13:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1304 states have (on average 1.4125766871165644) internal successors, (1842), 1304 states have internal predecessors, (1842), 377 states have call successors, (377), 17 states have call predecessors, (377), 17 states have return successors, (377), 377 states have call predecessors, (377), 377 states have call successors, (377) [2022-07-13 10:13:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2596 transitions. [2022-07-13 10:13:43,041 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2596 transitions. Word has length 117 [2022-07-13 10:13:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:13:43,042 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2596 transitions. [2022-07-13 10:13:43,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 10:13:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2596 transitions. [2022-07-13 10:13:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-13 10:13:43,045 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:13:43,045 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:13:43,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-13 10:13:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-13 10:13:43,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:13:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:13:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash -2069259542, now seen corresponding path program 4 times [2022-07-13 10:13:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:13:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339189105] [2022-07-13 10:13:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:13:43,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:13:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:13:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:13:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:13:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:13:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-13 10:13:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:13:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-13 10:13:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:13:43,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-13 10:13:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-13 10:13:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:13:43,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:13:43,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339189105] [2022-07-13 10:13:43,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339189105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:13:43,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958517503] [2022-07-13 10:13:43,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:13:43,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:13:43,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:13:43,489 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:13:43,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-13 10:13:43,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:13:43,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:13:43,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 10:13:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:13:43,804 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 [2022-07-13 10:13:44,173 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 7 [2022-07-13 10:13:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-13 10:13:44,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:13:44,493 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 15 [2022-07-13 10:13:44,495 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 34 treesize of output 30 [2022-07-13 10:13:44,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958517503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:13:44,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:13:44,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-07-13 10:13:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705861413] [2022-07-13 10:13:44,533 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:13:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-13 10:13:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:13:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-13 10:13:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 10:13:44,535 INFO L87 Difference]: Start difference. First operand 1699 states and 2596 transitions. Second operand has 39 states, 39 states have (on average 3.923076923076923) internal successors, (153), 39 states have internal predecessors, (153), 10 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20)