./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 eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-eb692b5 [2022-07-19 09:34:28,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:34:28,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:34:28,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:34:28,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:34:28,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:34:28,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:34:28,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:34:28,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:34:28,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:34:28,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:34:28,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:34:28,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:34:28,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:34:28,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:34:28,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:34:28,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:34:28,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:34:28,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:34:28,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:34:28,544 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:34:28,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:34:28,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:34:28,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:34:28,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:34:28,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:34:28,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:34:28,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:34:28,552 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:34:28,552 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:34:28,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:34:28,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:34:28,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:34:28,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:34:28,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:34:28,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:34:28,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:34:28,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:34:28,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:34:28,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:34:28,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:34:28,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:34:28,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:34:28,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:34:28,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:34:28,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:34:28,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:34:28,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:34:28,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:34:28,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:34:28,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:34:28,589 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:34:28,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:34:28,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:34:28,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:34:28,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:34:28,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:34:28,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:34:28,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:34:28,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:34:28,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:34:28,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:34:28,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:34:28,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:34:28,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:34:28,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:34:28,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:34:28,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:34:28,594 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:34:28,594 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:34:28,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:34:28,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67f3347d26557d25fb6343192d3c90918276f96e14a8e5c63bb68c9eaee65f5f [2022-07-19 09:34:28,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:34:28,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:34:28,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:34:28,840 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:34:28,841 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:34:28,842 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr2.c [2022-07-19 09:34:28,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7735a47/6d82e334132348f29b886c99c4811696/FLAG0d335d47f [2022-07-19 09:34:29,213 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:34:29,213 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr2.c [2022-07-19 09:34:29,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7735a47/6d82e334132348f29b886c99c4811696/FLAG0d335d47f [2022-07-19 09:34:29,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c7735a47/6d82e334132348f29b886c99c4811696 [2022-07-19 09:34:29,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:34:29,648 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:34:29,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:34:29,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:34:29,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:34:29,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6536c108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29, skipping insertion in model container [2022-07-19 09:34:29,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:34:29,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:34:29,790 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] [2022-07-19 09:34:29,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:34:29,810 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:34:29,818 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] [2022-07-19 09:34:29,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:34:29,833 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:34:29,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29 WrapperNode [2022-07-19 09:34:29,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:34:29,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:34:29,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:34:29,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:34:29,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,860 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2022-07-19 09:34:29,860 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:34:29,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:34:29,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:34:29,861 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:34:29,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:34:29,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:34:29,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:34:29,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:34:29,900 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (1/1) ... [2022-07-19 09:34:29,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:34:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:29,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 09:34:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 09:34:29,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:34:29,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:34:29,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:34:29,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:34:29,979 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-19 09:34:29,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-19 09:34:29,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:34:29,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:34:29,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:34:30,031 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:34:30,032 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:34:30,141 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:34:30,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:34:30,146 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:34:30,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:30 BoogieIcfgContainer [2022-07-19 09:34:30,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:34:30,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:34:30,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:34:30,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:34:30,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:34:29" (1/3) ... [2022-07-19 09:34:30,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51468657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:30, skipping insertion in model container [2022-07-19 09:34:30,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:34:29" (2/3) ... [2022-07-19 09:34:30,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51468657 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:34:30, skipping insertion in model container [2022-07-19 09:34:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:34:30" (3/3) ... [2022-07-19 09:34:30,154 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr2.c [2022-07-19 09:34:30,164 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:34:30,164 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:34:30,196 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:34:30,201 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@3a42b087, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3c06335b [2022-07-19 09:34:30,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:34:30,205 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) [2022-07-19 09:34:30,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:34:30,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:30,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:34:30,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1808077575, now seen corresponding path program 1 times [2022-07-19 09:34:30,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309865045] [2022-07-19 09:34:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:30,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:34:30,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:30,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309865045] [2022-07-19 09:34:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309865045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:34:30,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:34:30,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:34:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932487094] [2022-07-19 09:34:30,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:34:30,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:34:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:34:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:34:30,499 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) [2022-07-19 09:34:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:30,564 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2022-07-19 09:34:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:34:30,566 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 [2022-07-19 09:34:30,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:30,571 INFO L225 Difference]: With dead ends: 66 [2022-07-19 09:34:30,571 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 09:34:30,574 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 [2022-07-19 09:34:30,576 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 [2022-07-19 09:34:30,577 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] [2022-07-19 09:34:30,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 09:34:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-07-19 09:34:30,619 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) [2022-07-19 09:34:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-19 09:34:30,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2022-07-19 09:34:30,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:30,626 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-19 09:34:30,626 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) [2022-07-19 09:34:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-19 09:34:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 09:34:30,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:30,628 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] [2022-07-19 09:34:30,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:34:30,628 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2094570770, now seen corresponding path program 1 times [2022-07-19 09:34:30,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:30,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324521252] [2022-07-19 09:34:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:30,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:30,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:30,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324521252] [2022-07-19 09:34:30,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324521252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:30,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021263231] [2022-07-19 09:34:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:30,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:30,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:30,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:30,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:34:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:30,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 09:34:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:31,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-19 09:34:31,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:31,115 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 [2022-07-19 09:34:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:31,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:31,268 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 [2022-07-19 09:34:31,281 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 [2022-07-19 09:34:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:31,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021263231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:31,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:31,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-19 09:34:31,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483114785] [2022-07-19 09:34:31,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:31,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:34:31,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:31,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:34:31,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:34:31,305 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) [2022-07-19 09:34:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:31,481 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-19 09:34:31,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:34:31,481 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 [2022-07-19 09:34:31,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:31,482 INFO L225 Difference]: With dead ends: 66 [2022-07-19 09:34:31,482 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 09:34:31,483 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 [2022-07-19 09:34:31,484 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 [2022-07-19 09:34:31,484 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] [2022-07-19 09:34:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 09:34:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2022-07-19 09:34:31,490 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) [2022-07-19 09:34:31,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-07-19 09:34:31,491 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 25 [2022-07-19 09:34:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:31,491 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-07-19 09:34:31,492 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) [2022-07-19 09:34:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-07-19 09:34:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 09:34:31,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:31,493 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] [2022-07-19 09:34:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:31,707 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 [2022-07-19 09:34:31,707 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:31,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:31,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1613590512, now seen corresponding path program 1 times [2022-07-19 09:34:31,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:31,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757104460] [2022-07-19 09:34:31,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:31,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:31,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757104460] [2022-07-19 09:34:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757104460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:31,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250273526] [2022-07-19 09:34:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:31,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:31,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:31,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:34:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 09:34:31,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:32,018 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 [2022-07-19 09:34:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:32,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-19 09:34:32,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 09:34:32,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:32,249 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 [2022-07-19 09:34:32,253 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 [2022-07-19 09:34:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250273526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:32,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:32,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-19 09:34:32,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418790276] [2022-07-19 09:34:32,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:32,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:34:32,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:34:32,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:34:32,301 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) [2022-07-19 09:34:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:32,749 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-07-19 09:34:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:34:32,750 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 [2022-07-19 09:34:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:32,751 INFO L225 Difference]: With dead ends: 116 [2022-07-19 09:34:32,751 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 09:34:32,752 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 [2022-07-19 09:34:32,753 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 [2022-07-19 09:34:32,753 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] [2022-07-19 09:34:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 09:34:32,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 51. [2022-07-19 09:34:32,762 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) [2022-07-19 09:34:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2022-07-19 09:34:32,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 25 [2022-07-19 09:34:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:32,763 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2022-07-19 09:34:32,763 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) [2022-07-19 09:34:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2022-07-19 09:34:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:34:32,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:32,764 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] [2022-07-19 09:34:32,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:32,979 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 [2022-07-19 09:34:32,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 313438052, now seen corresponding path program 1 times [2022-07-19 09:34:32,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:32,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030035875] [2022-07-19 09:34:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:33,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030035875] [2022-07-19 09:34:33,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030035875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:33,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86506840] [2022-07-19 09:34:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:33,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:33,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:34:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 09:34:33,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:33,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:33,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:33,272 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 [2022-07-19 09:34:33,274 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 [2022-07-19 09:34:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86506840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:33,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:33,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-19 09:34:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408657357] [2022-07-19 09:34:33,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:34:33,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:34:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:34:33,295 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) [2022-07-19 09:34:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:33,450 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-07-19 09:34:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 09:34:33,450 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 [2022-07-19 09:34:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:33,451 INFO L225 Difference]: With dead ends: 108 [2022-07-19 09:34:33,451 INFO L226 Difference]: Without dead ends: 106 [2022-07-19 09:34:33,452 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 [2022-07-19 09:34:33,452 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 [2022-07-19 09:34:33,452 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] [2022-07-19 09:34:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-19 09:34:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2022-07-19 09:34:33,461 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) [2022-07-19 09:34:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2022-07-19 09:34:33,462 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 29 [2022-07-19 09:34:33,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:33,462 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2022-07-19 09:34:33,462 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) [2022-07-19 09:34:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2022-07-19 09:34:33,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 09:34:33,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:33,463 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] [2022-07-19 09:34:33,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 09:34:33,682 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 [2022-07-19 09:34:33,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:33,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1014502630, now seen corresponding path program 1 times [2022-07-19 09:34:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:33,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916355991] [2022-07-19 09:34:33,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:33,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:33,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:33,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916355991] [2022-07-19 09:34:33,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916355991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:33,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921682464] [2022-07-19 09:34:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:33,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:33,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:33,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:33,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:34:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:33,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 09:34:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:33,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:34,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:34,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:34,103 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 [2022-07-19 09:34:34,106 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 [2022-07-19 09:34:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921682464] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:34,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:34,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-19 09:34:34,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785620214] [2022-07-19 09:34:34,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:34,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:34:34,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:34,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:34:34,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:34:34,161 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) [2022-07-19 09:34:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:34,662 INFO L93 Difference]: Finished difference Result 152 states and 203 transitions. [2022-07-19 09:34:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 09:34:34,662 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 [2022-07-19 09:34:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:34,663 INFO L225 Difference]: With dead ends: 152 [2022-07-19 09:34:34,663 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 09:34:34,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 09:34:34,664 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:34,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 257 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:34:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 09:34:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 57. [2022-07-19 09:34:34,672 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) [2022-07-19 09:34:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-07-19 09:34:34,673 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-07-19 09:34:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:34,673 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-07-19 09:34:34,674 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) [2022-07-19 09:34:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-07-19 09:34:34,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 09:34:34,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:34,675 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] [2022-07-19 09:34:34,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:34,885 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 [2022-07-19 09:34:34,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1137782566, now seen corresponding path program 2 times [2022-07-19 09:34:34,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:34,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552524119] [2022-07-19 09:34:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:35,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:35,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:35,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552524119] [2022-07-19 09:34:35,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552524119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:35,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924270073] [2022-07-19 09:34:35,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:35,108 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:35,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:34:35,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 09:34:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:35,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 09:34:35,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924270073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:35,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:35,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2022-07-19 09:34:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107566194] [2022-07-19 09:34:35,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:35,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:34:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:35,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:34:35,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:34:35,526 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) [2022-07-19 09:34:35,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:35,726 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-07-19 09:34:35,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 09:34:35,726 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 [2022-07-19 09:34:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:35,728 INFO L225 Difference]: With dead ends: 104 [2022-07-19 09:34:35,728 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 09:34:35,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2022-07-19 09:34:35,732 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 [2022-07-19 09:34:35,732 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] [2022-07-19 09:34:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 09:34:35,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 66. [2022-07-19 09:34:35,743 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) [2022-07-19 09:34:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-07-19 09:34:35,744 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 33 [2022-07-19 09:34:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:35,744 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-07-19 09:34:35,745 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) [2022-07-19 09:34:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-07-19 09:34:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 09:34:35,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:35,746 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] [2022-07-19 09:34:35,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:35,961 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 [2022-07-19 09:34:35,961 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:35,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2068313767, now seen corresponding path program 2 times [2022-07-19 09:34:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:35,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155373069] [2022-07-19 09:34:35,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:36,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155373069] [2022-07-19 09:34:36,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155373069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:36,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786266987] [2022-07-19 09:34:36,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:36,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:36,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:36,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:34:36,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:36,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:36,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:34:36,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:36,251 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 [2022-07-19 09:34:36,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:36,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-19 09:34:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:36,434 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 [2022-07-19 09:34:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:34:36,487 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 [2022-07-19 09:34:36,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:34:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:36,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:36,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786266987] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:36,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:36,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-19 09:34:36,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381592779] [2022-07-19 09:34:36,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:36,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:34:36,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:36,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:34:36,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:34:36,678 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) [2022-07-19 09:34:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:37,235 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2022-07-19 09:34:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:34:37,235 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 [2022-07-19 09:34:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:37,237 INFO L225 Difference]: With dead ends: 99 [2022-07-19 09:34:37,237 INFO L226 Difference]: Without dead ends: 97 [2022-07-19 09:34:37,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 09:34:37,238 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 [2022-07-19 09:34:37,238 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] [2022-07-19 09:34:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-19 09:34:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 58. [2022-07-19 09:34:37,258 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) [2022-07-19 09:34:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-07-19 09:34:37,258 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 39 [2022-07-19 09:34:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:37,259 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-07-19 09:34:37,259 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) [2022-07-19 09:34:37,259 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-07-19 09:34:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:34:37,260 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:37,260 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] [2022-07-19 09:34:37,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 09:34:37,475 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 [2022-07-19 09:34:37,476 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash 513618191, now seen corresponding path program 3 times [2022-07-19 09:34:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:37,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465186032] [2022-07-19 09:34:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:37,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465186032] [2022-07-19 09:34:37,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465186032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:37,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131816256] [2022-07-19 09:34:37,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:34:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:37,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:37,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:37,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:34:37,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:34:37,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:37,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:34:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:37,680 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 [2022-07-19 09:34:37,701 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:37,701 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 [2022-07-19 09:34:37,758 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:37,759 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 [2022-07-19 09:34:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:37,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:37,820 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 [2022-07-19 09:34:37,822 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 [2022-07-19 09:34:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:37,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131816256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:37,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:37,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 13 [2022-07-19 09:34:37,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332579796] [2022-07-19 09:34:37,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:37,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:34:37,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:34:37,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:34:37,857 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) [2022-07-19 09:34:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:38,092 INFO L93 Difference]: Finished difference Result 158 states and 213 transitions. [2022-07-19 09:34:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 09:34:38,092 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 [2022-07-19 09:34:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:38,093 INFO L225 Difference]: With dead ends: 158 [2022-07-19 09:34:38,093 INFO L226 Difference]: Without dead ends: 156 [2022-07-19 09:34:38,093 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 [2022-07-19 09:34:38,094 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:38,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 254 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:34:38,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-19 09:34:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 79. [2022-07-19 09:34:38,113 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) [2022-07-19 09:34:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-19 09:34:38,114 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 47 [2022-07-19 09:34:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:38,114 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-19 09:34:38,115 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) [2022-07-19 09:34:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-19 09:34:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 09:34:38,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:38,116 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] [2022-07-19 09:34:38,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 09:34:38,331 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 [2022-07-19 09:34:38,331 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:38,331 INFO L85 PathProgramCache]: Analyzing trace with hash 936320017, now seen corresponding path program 1 times [2022-07-19 09:34:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:38,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630175110] [2022-07-19 09:34:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630175110] [2022-07-19 09:34:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630175110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120836700] [2022-07-19 09:34:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:38,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:38,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:38,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:34:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:38,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:34:38,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:38,619 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 [2022-07-19 09:34:38,681 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:34:38,681 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 [2022-07-19 09:34:38,781 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 [2022-07-19 09:34:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:34:38,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:38,905 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 [2022-07-19 09:34:38,907 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 [2022-07-19 09:34:38,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120836700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:38,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:38,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-19 09:34:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824488099] [2022-07-19 09:34:38,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:38,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:34:38,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:34:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:34:38,940 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) [2022-07-19 09:34:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:39,592 INFO L93 Difference]: Finished difference Result 214 states and 285 transitions. [2022-07-19 09:34:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:34:39,592 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 [2022-07-19 09:34:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:39,593 INFO L225 Difference]: With dead ends: 214 [2022-07-19 09:34:39,594 INFO L226 Difference]: Without dead ends: 212 [2022-07-19 09:34:39,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 09:34:39,595 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 [2022-07-19 09:34:39,595 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] [2022-07-19 09:34:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-19 09:34:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 101. [2022-07-19 09:34:39,607 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) [2022-07-19 09:34:39,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2022-07-19 09:34:39,608 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 47 [2022-07-19 09:34:39,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:39,609 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2022-07-19 09:34:39,609 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) [2022-07-19 09:34:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2022-07-19 09:34:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:34:39,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:39,610 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] [2022-07-19 09:34:39,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 09:34:39,827 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 [2022-07-19 09:34:39,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:39,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1147045125, now seen corresponding path program 4 times [2022-07-19 09:34:39,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:39,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944429623] [2022-07-19 09:34:39,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:39,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:39,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:39,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944429623] [2022-07-19 09:34:39,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944429623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:39,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009706332] [2022-07-19 09:34:39,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:34:39,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:39,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:39,992 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:40,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:34:40,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:34:40,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:40,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:34:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:40,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:40,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:40,245 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 [2022-07-19 09:34:40,246 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 [2022-07-19 09:34:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:40,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009706332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:40,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:40,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-19 09:34:40,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516332384] [2022-07-19 09:34:40,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:40,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:34:40,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:34:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:34:40,277 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) [2022-07-19 09:34:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:40,768 INFO L93 Difference]: Finished difference Result 319 states and 448 transitions. [2022-07-19 09:34:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 09:34:40,768 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 [2022-07-19 09:34:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:40,770 INFO L225 Difference]: With dead ends: 319 [2022-07-19 09:34:40,770 INFO L226 Difference]: Without dead ends: 317 [2022-07-19 09:34:40,771 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 [2022-07-19 09:34:40,771 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:40,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 440 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:34:40,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-07-19 09:34:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 187. [2022-07-19 09:34:40,792 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) [2022-07-19 09:34:40,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 263 transitions. [2022-07-19 09:34:40,793 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 263 transitions. Word has length 51 [2022-07-19 09:34:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:40,793 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 263 transitions. [2022-07-19 09:34:40,793 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) [2022-07-19 09:34:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 263 transitions. [2022-07-19 09:34:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-19 09:34:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:40,794 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] [2022-07-19 09:34:40,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:40,999 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 [2022-07-19 09:34:41,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -541898617, now seen corresponding path program 1 times [2022-07-19 09:34:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:41,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239410007] [2022-07-19 09:34:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:41,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239410007] [2022-07-19 09:34:41,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239410007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603388034] [2022-07-19 09:34:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:41,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:41,262 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:41,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:34:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:34:41,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:41,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:41,541 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 [2022-07-19 09:34:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:41,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:41,656 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 [2022-07-19 09:34:41,658 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 [2022-07-19 09:34:41,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603388034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:41,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:41,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-19 09:34:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49203913] [2022-07-19 09:34:41,694 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:34:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:34:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-07-19 09:34:41,696 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) [2022-07-19 09:34:42,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:42,611 INFO L93 Difference]: Finished difference Result 325 states and 440 transitions. [2022-07-19 09:34:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 09:34:42,615 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 [2022-07-19 09:34:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:42,617 INFO L225 Difference]: With dead ends: 325 [2022-07-19 09:34:42,617 INFO L226 Difference]: Without dead ends: 323 [2022-07-19 09:34:42,618 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 [2022-07-19 09:34:42,618 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, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:34:42,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 480 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:34:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-07-19 09:34:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 115. [2022-07-19 09:34:42,648 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) [2022-07-19 09:34:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 147 transitions. [2022-07-19 09:34:42,649 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 147 transitions. Word has length 51 [2022-07-19 09:34:42,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:42,650 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 147 transitions. [2022-07-19 09:34:42,650 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) [2022-07-19 09:34:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 147 transitions. [2022-07-19 09:34:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 09:34:42,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:42,651 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] [2022-07-19 09:34:42,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 09:34:42,867 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 [2022-07-19 09:34:42,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1086909947, now seen corresponding path program 5 times [2022-07-19 09:34:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282319264] [2022-07-19 09:34:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:43,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:43,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:43,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:43,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:43,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282319264] [2022-07-19 09:34:43,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282319264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:43,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578450345] [2022-07-19 09:34:43,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:34:43,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:43,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:43,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:43,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:34:43,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 09:34:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:34:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:43,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:43,720 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:43,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578450345] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:43,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:43,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2022-07-19 09:34:43,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860577939] [2022-07-19 09:34:43,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 09:34:43,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 09:34:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:34:43,721 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) [2022-07-19 09:34:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:43,966 INFO L93 Difference]: Finished difference Result 179 states and 232 transitions. [2022-07-19 09:34:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 09:34:43,967 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 [2022-07-19 09:34:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:43,968 INFO L225 Difference]: With dead ends: 179 [2022-07-19 09:34:43,968 INFO L226 Difference]: Without dead ends: 155 [2022-07-19 09:34:43,968 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 [2022-07-19 09:34:43,969 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 [2022-07-19 09:34:43,969 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] [2022-07-19 09:34:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-19 09:34:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 125. [2022-07-19 09:34:43,989 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) [2022-07-19 09:34:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 159 transitions. [2022-07-19 09:34:43,990 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 159 transitions. Word has length 55 [2022-07-19 09:34:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:43,990 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 159 transitions. [2022-07-19 09:34:43,990 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) [2022-07-19 09:34:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 159 transitions. [2022-07-19 09:34:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:34:43,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:43,991 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] [2022-07-19 09:34:44,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 09:34:44,195 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 [2022-07-19 09:34:44,196 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1543341178, now seen corresponding path program 2 times [2022-07-19 09:34:44,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:44,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605322579] [2022-07-19 09:34:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:44,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:44,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605322579] [2022-07-19 09:34:44,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605322579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:44,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555430023] [2022-07-19 09:34:44,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:44,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:44,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:44,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:44,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:34:44,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:44,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:44,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:34:44,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:44,375 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 [2022-07-19 09:34:44,397 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:44,397 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 [2022-07-19 09:34:44,455 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:44,456 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 [2022-07-19 09:34:44,486 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:44,487 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 [2022-07-19 09:34:44,537 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:44,538 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 [2022-07-19 09:34:44,550 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:44,647 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 [2022-07-19 09:34:44,649 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 [2022-07-19 09:34:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:44,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555430023] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:44,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:44,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-19 09:34:44,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079447325] [2022-07-19 09:34:44,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:44,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 09:34:44,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:44,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 09:34:44,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:34:44,681 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) [2022-07-19 09:34:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:44,935 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-07-19 09:34:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 09:34:44,936 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 [2022-07-19 09:34:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:44,936 INFO L225 Difference]: With dead ends: 192 [2022-07-19 09:34:44,936 INFO L226 Difference]: Without dead ends: 190 [2022-07-19 09:34:44,937 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 [2022-07-19 09:34:44,937 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 [2022-07-19 09:34:44,937 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] [2022-07-19 09:34:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-19 09:34:44,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 147. [2022-07-19 09:34:44,966 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) [2022-07-19 09:34:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 195 transitions. [2022-07-19 09:34:44,967 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 195 transitions. Word has length 61 [2022-07-19 09:34:44,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:44,967 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 195 transitions. [2022-07-19 09:34:44,968 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) [2022-07-19 09:34:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 195 transitions. [2022-07-19 09:34:44,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:34:44,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:44,969 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] [2022-07-19 09:34:44,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:45,179 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 [2022-07-19 09:34:45,179 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:45,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1471762440, now seen corresponding path program 1 times [2022-07-19 09:34:45,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:45,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679477564] [2022-07-19 09:34:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:45,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679477564] [2022-07-19 09:34:45,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679477564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:45,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99447671] [2022-07-19 09:34:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:45,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:45,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:45,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:45,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:34:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:45,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:34:45,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:45,429 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 [2022-07-19 09:34:45,450 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:45,451 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 [2022-07-19 09:34:45,500 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:45,501 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 [2022-07-19 09:34:45,532 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:45,532 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 [2022-07-19 09:34:45,589 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:45,590 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 [2022-07-19 09:34:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:45,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:45,708 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 [2022-07-19 09:34:45,710 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 [2022-07-19 09:34:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99447671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:45,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:45,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 16 [2022-07-19 09:34:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541956916] [2022-07-19 09:34:45,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 09:34:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:45,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 09:34:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-07-19 09:34:45,742 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) [2022-07-19 09:34:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:46,019 INFO L93 Difference]: Finished difference Result 213 states and 277 transitions. [2022-07-19 09:34:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 09:34:46,019 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 [2022-07-19 09:34:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:46,021 INFO L225 Difference]: With dead ends: 213 [2022-07-19 09:34:46,021 INFO L226 Difference]: Without dead ends: 211 [2022-07-19 09:34:46,021 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 [2022-07-19 09:34:46,022 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 [2022-07-19 09:34:46,022 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] [2022-07-19 09:34:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-19 09:34:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2022-07-19 09:34:46,051 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) [2022-07-19 09:34:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 201 transitions. [2022-07-19 09:34:46,052 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 201 transitions. Word has length 61 [2022-07-19 09:34:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:46,053 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 201 transitions. [2022-07-19 09:34:46,053 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) [2022-07-19 09:34:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 201 transitions. [2022-07-19 09:34:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 09:34:46,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:46,054 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] [2022-07-19 09:34:46,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-19 09:34:46,267 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 [2022-07-19 09:34:46,267 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1484918790, now seen corresponding path program 3 times [2022-07-19 09:34:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835333898] [2022-07-19 09:34:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:46,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:46,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835333898] [2022-07-19 09:34:46,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835333898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345273763] [2022-07-19 09:34:46,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:34:46,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:46,411 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:46,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 09:34:46,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 09:34:46,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:46,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:34:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:46,584 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 [2022-07-19 09:34:46,636 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:46,636 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 [2022-07-19 09:34:46,695 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:46,695 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 [2022-07-19 09:34:46,737 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:34:46,738 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 [2022-07-19 09:34:46,821 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 [2022-07-19 09:34:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:34:46,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:46,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345273763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:46,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:46,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-07-19 09:34:46,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733204649] [2022-07-19 09:34:46,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:46,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 09:34:46,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 09:34:46,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-07-19 09:34:46,959 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) [2022-07-19 09:34:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:47,591 INFO L93 Difference]: Finished difference Result 222 states and 290 transitions. [2022-07-19 09:34:47,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 09:34:47,592 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 [2022-07-19 09:34:47,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:47,593 INFO L225 Difference]: With dead ends: 222 [2022-07-19 09:34:47,593 INFO L226 Difference]: Without dead ends: 220 [2022-07-19 09:34:47,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=2184, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:34:47,597 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 136 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-07-19 09:34:47,597 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] [2022-07-19 09:34:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-19 09:34:47,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 101. [2022-07-19 09:34:47,616 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) [2022-07-19 09:34:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-07-19 09:34:47,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 61 [2022-07-19 09:34:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-07-19 09:34:47,617 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) [2022-07-19 09:34:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-07-19 09:34:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 09:34:47,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:47,618 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] [2022-07-19 09:34:47,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:47,822 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 [2022-07-19 09:34:47,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash -227276688, now seen corresponding path program 6 times [2022-07-19 09:34:47,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:47,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625760933] [2022-07-19 09:34:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:47,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:47,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625760933] [2022-07-19 09:34:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625760933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918416968] [2022-07-19 09:34:47,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:34:47,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:47,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:47,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:48,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 09:34:48,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:34:48,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:48,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:34:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:48,154 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 [2022-07-19 09:34:48,176 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:34:48,176 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 [2022-07-19 09:34:48,270 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:48,270 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 [2022-07-19 09:34:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:48,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:48,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-19 09:34:48,339 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 [2022-07-19 09:34:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:48,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918416968] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:48,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:48,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-19 09:34:48,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585725643] [2022-07-19 09:34:48,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:48,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:34:48,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:48,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:34:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-19 09:34:48,381 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) [2022-07-19 09:34:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:49,313 INFO L93 Difference]: Finished difference Result 552 states and 806 transitions. [2022-07-19 09:34:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 09:34:49,314 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 [2022-07-19 09:34:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:49,316 INFO L225 Difference]: With dead ends: 552 [2022-07-19 09:34:49,317 INFO L226 Difference]: Without dead ends: 550 [2022-07-19 09:34:49,317 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 [2022-07-19 09:34:49,318 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 [2022-07-19 09:34:49,318 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] [2022-07-19 09:34:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-19 09:34:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 163. [2022-07-19 09:34:49,350 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) [2022-07-19 09:34:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 225 transitions. [2022-07-19 09:34:49,351 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 225 transitions. Word has length 69 [2022-07-19 09:34:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:49,351 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 225 transitions. [2022-07-19 09:34:49,351 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) [2022-07-19 09:34:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 225 transitions. [2022-07-19 09:34:49,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 09:34:49,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:49,352 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] [2022-07-19 09:34:49,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 09:34:49,577 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 [2022-07-19 09:34:49,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:49,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:49,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1158926706, now seen corresponding path program 4 times [2022-07-19 09:34:49,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:49,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075224278] [2022-07-19 09:34:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:49,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:49,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075224278] [2022-07-19 09:34:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075224278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904517495] [2022-07-19 09:34:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:34:49,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:49,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:49,732 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:49,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 09:34:49,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:34:49,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:34:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:49,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-19 09:34:49,970 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:34:49,970 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 [2022-07-19 09:34:50,117 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 [2022-07-19 09:34:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 09:34:50,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:52,308 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 [2022-07-19 09:34:52,310 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 [2022-07-19 09:34:52,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904517495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:52,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:52,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 09:34:52,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76008944] [2022-07-19 09:34:52,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:52,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:34:52,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:52,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:34:52,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2022-07-19 09:34:52,345 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) [2022-07-19 09:34:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:54,151 INFO L93 Difference]: Finished difference Result 697 states and 1004 transitions. [2022-07-19 09:34:54,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-19 09:34:54,156 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 [2022-07-19 09:34:54,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:54,159 INFO L225 Difference]: With dead ends: 697 [2022-07-19 09:34:54,159 INFO L226 Difference]: Without dead ends: 695 [2022-07-19 09:34:54,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3094 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=867, Invalid=7874, Unknown=1, NotChecked=0, Total=8742 [2022-07-19 09:34:54,165 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 [2022-07-19 09:34:54,165 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] [2022-07-19 09:34:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-07-19 09:34:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 196. [2022-07-19 09:34:54,215 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) [2022-07-19 09:34:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-07-19 09:34:54,217 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 69 [2022-07-19 09:34:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:54,217 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-07-19 09:34:54,218 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) [2022-07-19 09:34:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-07-19 09:34:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 09:34:54,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:54,219 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] [2022-07-19 09:34:54,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:54,439 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 [2022-07-19 09:34:54,439 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:54,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:54,440 INFO L85 PathProgramCache]: Analyzing trace with hash 407421926, now seen corresponding path program 7 times [2022-07-19 09:34:54,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:54,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308778761] [2022-07-19 09:34:54,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:54,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:54,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308778761] [2022-07-19 09:34:54,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308778761] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:54,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471339013] [2022-07-19 09:34:54,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:34:54,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:54,567 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:54,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 09:34:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:34:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:54,685 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 [2022-07-19 09:34:54,838 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:34:54,838 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 [2022-07-19 09:34:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:54,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:54,909 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 [2022-07-19 09:34:54,913 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 [2022-07-19 09:34:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:54,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471339013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:34:54,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:34:54,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-19 09:34:54,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455905676] [2022-07-19 09:34:54,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:54,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:34:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:54,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:34:54,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:34:54,971 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) [2022-07-19 09:34:57,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:34:57,102 INFO L93 Difference]: Finished difference Result 1725 states and 2618 transitions. [2022-07-19 09:34:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-19 09:34:57,102 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 [2022-07-19 09:34:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:34:57,107 INFO L225 Difference]: With dead ends: 1725 [2022-07-19 09:34:57,107 INFO L226 Difference]: Without dead ends: 1723 [2022-07-19 09:34:57,109 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 [2022-07-19 09:34:57,109 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 [2022-07-19 09:34:57,109 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] [2022-07-19 09:34:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-07-19 09:34:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 406. [2022-07-19 09:34:57,221 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) [2022-07-19 09:34:57,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 598 transitions. [2022-07-19 09:34:57,227 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 598 transitions. Word has length 73 [2022-07-19 09:34:57,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:34:57,227 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 598 transitions. [2022-07-19 09:34:57,227 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) [2022-07-19 09:34:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 598 transitions. [2022-07-19 09:34:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 09:34:57,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:34:57,228 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] [2022-07-19 09:34:57,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 09:34:57,448 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 [2022-07-19 09:34:57,449 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:34:57,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:34:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1964317336, now seen corresponding path program 2 times [2022-07-19 09:34:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:34:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307290399] [2022-07-19 09:34:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:34:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:34:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:34:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:34:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:34:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:34:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:34:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:34:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:34:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:57,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:34:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307290399] [2022-07-19 09:34:57,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307290399] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378925661] [2022-07-19 09:34:57,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:34:57,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:34:57,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:34:57,644 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:34:57,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 09:34:57,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:34:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:34:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 09:34:57,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:34:57,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:34:58,045 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 [2022-07-19 09:34:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:34:58,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:34:58,168 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 [2022-07-19 09:34:58,169 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 [2022-07-19 09:34:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378925661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:34:58,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:34:58,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2022-07-19 09:34:58,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258205511] [2022-07-19 09:34:58,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:34:58,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 09:34:58,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:34:58,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 09:34:58,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 09:34:58,195 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) [2022-07-19 09:35:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:00,686 INFO L93 Difference]: Finished difference Result 1238 states and 1848 transitions. [2022-07-19 09:35:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-19 09:35:00,687 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 [2022-07-19 09:35:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:00,691 INFO L225 Difference]: With dead ends: 1238 [2022-07-19 09:35:00,691 INFO L226 Difference]: Without dead ends: 1236 [2022-07-19 09:35:00,693 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 [2022-07-19 09:35:00,694 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 [2022-07-19 09:35:00,694 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] [2022-07-19 09:35:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2022-07-19 09:35:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 218. [2022-07-19 09:35:00,763 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) [2022-07-19 09:35:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 293 transitions. [2022-07-19 09:35:00,764 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 293 transitions. Word has length 73 [2022-07-19 09:35:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:00,765 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 293 transitions. [2022-07-19 09:35:00,765 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) [2022-07-19 09:35:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 293 transitions. [2022-07-19 09:35:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 09:35:00,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:00,766 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] [2022-07-19 09:35:00,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:00,983 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 [2022-07-19 09:35:00,984 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:00,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2050567076, now seen corresponding path program 8 times [2022-07-19 09:35:00,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:00,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719312248] [2022-07-19 09:35:00,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:01,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:01,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:01,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:01,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:01,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719312248] [2022-07-19 09:35:01,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719312248] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:01,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434965601] [2022-07-19 09:35:01,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:35:01,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:01,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:01,287 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:01,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 09:35:01,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:35:01,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:01,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 09:35:01,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:01,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 27 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 09:35:02,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434965601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:02,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:02,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 43 [2022-07-19 09:35:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191435837] [2022-07-19 09:35:02,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 09:35:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 09:35:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=1378, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:35:02,121 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) [2022-07-19 09:35:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:02,512 INFO L93 Difference]: Finished difference Result 298 states and 400 transitions. [2022-07-19 09:35:02,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 09:35:02,513 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 [2022-07-19 09:35:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:02,514 INFO L225 Difference]: With dead ends: 298 [2022-07-19 09:35:02,514 INFO L226 Difference]: Without dead ends: 266 [2022-07-19 09:35:02,515 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 [2022-07-19 09:35:02,515 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 255 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-07-19 09:35:02,515 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] [2022-07-19 09:35:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-19 09:35:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 233. [2022-07-19 09:35:02,569 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) [2022-07-19 09:35:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 311 transitions. [2022-07-19 09:35:02,570 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 311 transitions. Word has length 77 [2022-07-19 09:35:02,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:02,570 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 311 transitions. [2022-07-19 09:35:02,571 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) [2022-07-19 09:35:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 311 transitions. [2022-07-19 09:35:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:35:02,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:02,572 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] [2022-07-19 09:35:02,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:02,788 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 [2022-07-19 09:35:02,788 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:02,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -949126895, now seen corresponding path program 9 times [2022-07-19 09:35:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:02,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858194223] [2022-07-19 09:35:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:02,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:02,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858194223] [2022-07-19 09:35:02,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858194223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:02,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278821651] [2022-07-19 09:35:02,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:35:02,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:02,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:02,955 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:02,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 09:35:03,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:35:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:35:03,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:03,130 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 [2022-07-19 09:35:03,152 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:03,152 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 [2022-07-19 09:35:03,333 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:35:03,334 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 [2022-07-19 09:35:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:03,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:03,403 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 [2022-07-19 09:35:03,405 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 [2022-07-19 09:35:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:03,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278821651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:03,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:03,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-19 09:35:03,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476404006] [2022-07-19 09:35:03,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:03,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:35:03,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:03,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:35:03,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:35:03,482 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) [2022-07-19 09:35:08,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:08,113 INFO L93 Difference]: Finished difference Result 3600 states and 5511 transitions. [2022-07-19 09:35:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-07-19 09:35:08,114 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 [2022-07-19 09:35:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:08,124 INFO L225 Difference]: With dead ends: 3600 [2022-07-19 09:35:08,124 INFO L226 Difference]: Without dead ends: 3598 [2022-07-19 09:35:08,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 184 SyntacticMatches, 8 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8611 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1914, Invalid=19548, Unknown=0, NotChecked=0, Total=21462 [2022-07-19 09:35:08,127 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 191 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:08,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1516 Invalid, 4570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 09:35:08,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2022-07-19 09:35:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 458. [2022-07-19 09:35:08,312 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) [2022-07-19 09:35:08,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 663 transitions. [2022-07-19 09:35:08,313 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 663 transitions. Word has length 91 [2022-07-19 09:35:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:08,314 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 663 transitions. [2022-07-19 09:35:08,314 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) [2022-07-19 09:35:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 663 transitions. [2022-07-19 09:35:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:35:08,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:08,315 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] [2022-07-19 09:35:08,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:08,532 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 [2022-07-19 09:35:08,532 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:08,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:08,532 INFO L85 PathProgramCache]: Analyzing trace with hash -289595373, now seen corresponding path program 5 times [2022-07-19 09:35:08,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:08,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557093937] [2022-07-19 09:35:08,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:08,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:08,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:08,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:08,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557093937] [2022-07-19 09:35:08,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557093937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:08,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825070026] [2022-07-19 09:35:08,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:35:08,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:08,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:08,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:08,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 09:35:08,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 09:35:08,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:35:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:09,048 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 [2022-07-19 09:35:09,120 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:35:09,121 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 [2022-07-19 09:35:09,349 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 [2022-07-19 09:35:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 09:35:09,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:11,575 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 [2022-07-19 09:35:11,577 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 [2022-07-19 09:35:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825070026] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:11,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:35:11,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-19 09:35:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949159587] [2022-07-19 09:35:11,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 09:35:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:11,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 09:35:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1484, Unknown=1, NotChecked=0, Total=1640 [2022-07-19 09:35:11,611 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) [2022-07-19 09:35:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:16,532 INFO L93 Difference]: Finished difference Result 1812 states and 2691 transitions. [2022-07-19 09:35:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-19 09:35:16,534 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 [2022-07-19 09:35:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:16,539 INFO L225 Difference]: With dead ends: 1812 [2022-07-19 09:35:16,540 INFO L226 Difference]: Without dead ends: 1810 [2022-07-19 09:35:16,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1117, Invalid=13401, Unknown=2, NotChecked=0, Total=14520 [2022-07-19 09:35:16,542 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 390 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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 [2022-07-19 09:35:16,542 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] [2022-07-19 09:35:16,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-07-19 09:35:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 443. [2022-07-19 09:35:16,691 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) [2022-07-19 09:35:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 630 transitions. [2022-07-19 09:35:16,692 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 630 transitions. Word has length 91 [2022-07-19 09:35:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:16,692 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 630 transitions. [2022-07-19 09:35:16,692 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) [2022-07-19 09:35:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 630 transitions. [2022-07-19 09:35:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:35:16,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:16,694 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] [2022-07-19 09:35:16,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:16,910 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 [2022-07-19 09:35:16,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash -68748281, now seen corresponding path program 10 times [2022-07-19 09:35:16,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:16,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004296501] [2022-07-19 09:35:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:16,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004296501] [2022-07-19 09:35:17,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004296501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:17,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48824611] [2022-07-19 09:35:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:35:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:17,072 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:17,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 09:35:17,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:35:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:17,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 09:35:17,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:17,189 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 [2022-07-19 09:35:17,383 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:35:17,384 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 [2022-07-19 09:35:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:17,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:17,460 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 [2022-07-19 09:35:17,461 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 [2022-07-19 09:35:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:17,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48824611] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:17,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:17,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 25 [2022-07-19 09:35:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706672039] [2022-07-19 09:35:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:35:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:17,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:35:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:35:17,525 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) [2022-07-19 09:35:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:29,248 INFO L93 Difference]: Finished difference Result 12950 states and 20137 transitions. [2022-07-19 09:35:29,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-07-19 09:35:29,248 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 [2022-07-19 09:35:29,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:29,289 INFO L225 Difference]: With dead ends: 12950 [2022-07-19 09:35:29,289 INFO L226 Difference]: Without dead ends: 12948 [2022-07-19 09:35:29,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32066 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=66941, Unknown=0, NotChecked=0, Total=72092 [2022-07-19 09:35:29,317 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 427 mSDsluCounter, 2303 mSDsCounter, 0 mSdLazyCounter, 7857 mSolverCounterSat, 1393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:29,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2732 Invalid, 9250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1393 Valid, 7857 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 09:35:29,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12948 states. [2022-07-19 09:35:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12948 to 1173. [2022-07-19 09:35:29,900 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) [2022-07-19 09:35:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1788 transitions. [2022-07-19 09:35:29,903 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1788 transitions. Word has length 95 [2022-07-19 09:35:29,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:29,903 INFO L495 AbstractCegarLoop]: Abstraction has 1173 states and 1788 transitions. [2022-07-19 09:35:29,903 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) [2022-07-19 09:35:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1788 transitions. [2022-07-19 09:35:29,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:35:29,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:29,906 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] [2022-07-19 09:35:29,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:30,122 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 [2022-07-19 09:35:30,123 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:30,124 INFO L85 PathProgramCache]: Analyzing trace with hash -912753783, now seen corresponding path program 3 times [2022-07-19 09:35:30,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:30,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589166735] [2022-07-19 09:35:30,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:30,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:30,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:30,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589166735] [2022-07-19 09:35:30,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589166735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:30,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547210660] [2022-07-19 09:35:30,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:35:30,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:30,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:30,335 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:30,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 09:35:30,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:35:30,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:30,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 09:35:30,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:30,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:35:31,050 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 [2022-07-19 09:35:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:31,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:31,305 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 [2022-07-19 09:35:31,307 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 [2022-07-19 09:35:31,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547210660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:31,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:35:31,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2022-07-19 09:35:31,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035137241] [2022-07-19 09:35:31,341 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:31,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 09:35:31,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:31,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 09:35:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:35:31,342 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) [2022-07-19 09:35:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:36,750 INFO L93 Difference]: Finished difference Result 4311 states and 6644 transitions. [2022-07-19 09:35:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-19 09:35:36,751 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 [2022-07-19 09:35:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:36,760 INFO L225 Difference]: With dead ends: 4311 [2022-07-19 09:35:36,760 INFO L226 Difference]: Without dead ends: 4309 [2022-07-19 09:35:36,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1973, Invalid=17767, Unknown=0, NotChecked=0, Total=19740 [2022-07-19 09:35:36,762 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 [2022-07-19 09:35:36,762 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] [2022-07-19 09:35:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2022-07-19 09:35:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 473. [2022-07-19 09:35:37,030 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) [2022-07-19 09:35:37,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 661 transitions. [2022-07-19 09:35:37,031 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 661 transitions. Word has length 95 [2022-07-19 09:35:37,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:37,031 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 661 transitions. [2022-07-19 09:35:37,032 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) [2022-07-19 09:35:37,032 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 661 transitions. [2022-07-19 09:35:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 09:35:37,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:37,033 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] [2022-07-19 09:35:37,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-19 09:35:37,247 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 [2022-07-19 09:35:37,247 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1499687394, now seen corresponding path program 6 times [2022-07-19 09:35:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:37,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19643126] [2022-07-19 09:35:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:37,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:37,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:35:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:35:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:35:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19643126] [2022-07-19 09:35:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19643126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543763817] [2022-07-19 09:35:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:35:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:37,464 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:35:37,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 09:35:37,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-19 09:35:37,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 09:35:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:37,814 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 [2022-07-19 09:35:37,886 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:37,887 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 [2022-07-19 09:35:37,959 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:35:37,960 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 [2022-07-19 09:35:38,003 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:35:38,003 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 [2022-07-19 09:35:38,076 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:35:38,077 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 [2022-07-19 09:35:38,128 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:35:38,128 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 [2022-07-19 09:35:38,282 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 [2022-07-19 09:35:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 09:35:38,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:39,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543763817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:39,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:35:39,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-19 09:35:39,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665740243] [2022-07-19 09:35:39,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:35:39,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:39,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:35:39,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1191, Unknown=1, NotChecked=0, Total=1332 [2022-07-19 09:35:39,051 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) [2022-07-19 09:35:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:40,956 INFO L93 Difference]: Finished difference Result 853 states and 1173 transitions. [2022-07-19 09:35:40,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 09:35:40,957 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 [2022-07-19 09:35:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:40,959 INFO L225 Difference]: With dead ends: 853 [2022-07-19 09:35:40,959 INFO L226 Difference]: Without dead ends: 851 [2022-07-19 09:35:40,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2448 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=694, Invalid=6787, Unknown=1, NotChecked=0, Total=7482 [2022-07-19 09:35:40,960 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 231 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:40,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 820 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1325 Invalid, 0 Unknown, 99 Unchecked, 0.6s Time] [2022-07-19 09:35:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-07-19 09:35:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 319. [2022-07-19 09:35:41,148 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) [2022-07-19 09:35:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 429 transitions. [2022-07-19 09:35:41,148 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 429 transitions. Word has length 97 [2022-07-19 09:35:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:41,149 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 429 transitions. [2022-07-19 09:35:41,149 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) [2022-07-19 09:35:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 429 transitions. [2022-07-19 09:35:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-19 09:35:41,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:41,150 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] [2022-07-19 09:35:41,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:41,363 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 [2022-07-19 09:35:41,363 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash -2124803075, now seen corresponding path program 11 times [2022-07-19 09:35:41,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:41,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372948687] [2022-07-19 09:35:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:41,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 99 proven. 81 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:41,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:41,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372948687] [2022-07-19 09:35:41,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372948687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279926089] [2022-07-19 09:35:41,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:35:41,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:41,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:41,722 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) [2022-07-19 09:35:41,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 09:35:41,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 09:35:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 09:35:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:42,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:42,714 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 128 proven. 52 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:35:42,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279926089] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:42,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:42,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-19 09:35:42,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595445983] [2022-07-19 09:35:42,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:42,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 09:35:42,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:42,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 09:35:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614, Invalid=2038, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 09:35:42,717 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) [2022-07-19 09:35:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:43,305 INFO L93 Difference]: Finished difference Result 423 states and 569 transitions. [2022-07-19 09:35:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 09:35:43,306 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 [2022-07-19 09:35:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:43,308 INFO L225 Difference]: With dead ends: 423 [2022-07-19 09:35:43,308 INFO L226 Difference]: Without dead ends: 383 [2022-07-19 09:35:43,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=887, Invalid=2773, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:35:43,309 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 443 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-19 09:35:43,309 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] [2022-07-19 09:35:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-07-19 09:35:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2022-07-19 09:35:43,633 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) [2022-07-19 09:35:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 453 transitions. [2022-07-19 09:35:43,634 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 453 transitions. Word has length 99 [2022-07-19 09:35:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:43,634 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 453 transitions. [2022-07-19 09:35:43,634 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) [2022-07-19 09:35:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 453 transitions. [2022-07-19 09:35:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 09:35:43,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:43,636 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] [2022-07-19 09:35:43,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:43,846 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 [2022-07-19 09:35:43,847 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:43,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1648422158, now seen corresponding path program 12 times [2022-07-19 09:35:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:43,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885942054] [2022-07-19 09:35:43,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:35:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:35:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:35:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:35:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:35:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:35:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:35:44,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:35:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:35:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885942054] [2022-07-19 09:35:44,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885942054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915871280] [2022-07-19 09:35:44,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:35:44,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:44,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:44,070 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) [2022-07-19 09:35:44,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 09:35:44,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-19 09:35:44,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:44,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:35:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:44,453 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 [2022-07-19 09:35:44,474 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:35:44,474 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 [2022-07-19 09:35:44,711 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:35:44,711 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 [2022-07-19 09:35:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:35:44,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:44,822 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 [2022-07-19 09:35:44,823 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 [2022-07-19 09:35:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:35:44,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915871280] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:44,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:44,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 28 [2022-07-19 09:35:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975470687] [2022-07-19 09:35:44,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 09:35:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:44,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 09:35:44,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-07-19 09:35:44,906 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) [2022-07-19 09:36:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:18,240 INFO L93 Difference]: Finished difference Result 16750 states and 25950 transitions. [2022-07-19 09:36:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2022-07-19 09:36:18,241 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 [2022-07-19 09:36:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:18,268 INFO L225 Difference]: With dead ends: 16750 [2022-07-19 09:36:18,268 INFO L226 Difference]: Without dead ends: 16748 [2022-07-19 09:36:18,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 230 SyntacticMatches, 8 SemanticMatches, 488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112803 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=14055, Invalid=225555, Unknown=0, NotChecked=0, Total=239610 [2022-07-19 09:36:18,280 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 [2022-07-19 09:36:18,280 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] [2022-07-19 09:36:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16748 states. [2022-07-19 09:36:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16748 to 735. [2022-07-19 09:36:19,348 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) [2022-07-19 09:36:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1078 transitions. [2022-07-19 09:36:19,349 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1078 transitions. Word has length 113 [2022-07-19 09:36:19,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:19,350 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 1078 transitions. [2022-07-19 09:36:19,350 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) [2022-07-19 09:36:19,350 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1078 transitions. [2022-07-19 09:36:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-19 09:36:19,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:19,352 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] [2022-07-19 09:36:19,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:19,568 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 [2022-07-19 09:36:19,568 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:19,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -754935820, now seen corresponding path program 7 times [2022-07-19 09:36:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:19,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002282269] [2022-07-19 09:36:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:19,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:36:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:36:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:36:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:36:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:36:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:36:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:36:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:36:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:36:19,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002282269] [2022-07-19 09:36:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002282269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:19,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189746794] [2022-07-19 09:36:19,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:36:19,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:19,805 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) [2022-07-19 09:36:19,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 09:36:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:19,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:36:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:20,112 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 [2022-07-19 09:36:20,179 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:20,179 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 [2022-07-19 09:36:20,453 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 [2022-07-19 09:36:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 27 proven. 213 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 09:36:20,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:22,755 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 [2022-07-19 09:36:22,757 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 [2022-07-19 09:36:22,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189746794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:22,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:22,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-07-19 09:36:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137376178] [2022-07-19 09:36:22,793 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:22,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 09:36:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 09:36:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2162, Unknown=1, NotChecked=0, Total=2352 [2022-07-19 09:36:22,800 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) [2022-07-19 09:36:29,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:29,781 INFO L93 Difference]: Finished difference Result 1648 states and 2405 transitions. [2022-07-19 09:36:29,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-19 09:36:29,782 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 [2022-07-19 09:36:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:29,785 INFO L225 Difference]: With dead ends: 1648 [2022-07-19 09:36:29,785 INFO L226 Difference]: Without dead ends: 1646 [2022-07-19 09:36:29,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1026, Invalid=14472, Unknown=2, NotChecked=0, Total=15500 [2022-07-19 09:36:29,787 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 323 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:29,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1492 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 2441 Invalid, 0 Unknown, 163 Unchecked, 1.1s Time] [2022-07-19 09:36:29,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-19 09:36:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 531. [2022-07-19 09:36:30,313 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) [2022-07-19 09:36:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 738 transitions. [2022-07-19 09:36:30,314 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 738 transitions. Word has length 113 [2022-07-19 09:36:30,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:30,314 INFO L495 AbstractCegarLoop]: Abstraction has 531 states and 738 transitions. [2022-07-19 09:36:30,314 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) [2022-07-19 09:36:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 738 transitions. [2022-07-19 09:36:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-19 09:36:30,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:30,316 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] [2022-07-19 09:36:30,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:30,532 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 [2022-07-19 09:36:30,533 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1171866264, now seen corresponding path program 13 times [2022-07-19 09:36:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:30,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152725701] [2022-07-19 09:36:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:30,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:36:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:36:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:36:30,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:36:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:36:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:36:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:36:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:36:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:36:30,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:30,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152725701] [2022-07-19 09:36:30,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152725701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:30,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53474327] [2022-07-19 09:36:30,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:36:30,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:30,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:30,749 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) [2022-07-19 09:36:30,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 09:36:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 09:36:30,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:30,908 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 [2022-07-19 09:36:31,108 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:36:31,108 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 [2022-07-19 09:36:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:36:31,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:31,177 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 [2022-07-19 09:36:31,178 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 [2022-07-19 09:36:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:36:31,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53474327] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:31,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:31,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 30 [2022-07-19 09:36:31,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147951836] [2022-07-19 09:36:31,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:36:31,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:36:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:36:31,242 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) [2022-07-19 09:38:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:27,906 INFO L93 Difference]: Finished difference Result 60525 states and 94471 transitions. [2022-07-19 09:38:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 924 states. [2022-07-19 09:38:27,907 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 [2022-07-19 09:38:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:28,060 INFO L225 Difference]: With dead ends: 60525 [2022-07-19 09:38:28,060 INFO L226 Difference]: Without dead ends: 60523 [2022-07-19 09:38:28,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1174 GetRequests, 237 SyntacticMatches, 7 SemanticMatches, 930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424502 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=39010, Invalid=828682, Unknown=0, NotChecked=0, Total=867692 [2022-07-19 09:38:28,109 INFO L413 NwaCegarLoop]: 1292 mSDtfsCounter, 1145 mSDsluCounter, 5911 mSDsCounter, 0 mSdLazyCounter, 28946 mSolverCounterSat, 5780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s 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, 12.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:28,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1161 Valid, 7203 Invalid, 34726 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5780 Valid, 28946 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-07-19 09:38:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60523 states. [2022-07-19 09:38:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60523 to 1699. [2022-07-19 09:38:32,403 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) [2022-07-19 09:38:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2596 transitions. [2022-07-19 09:38:32,406 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2596 transitions. Word has length 117 [2022-07-19 09:38:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:32,406 INFO L495 AbstractCegarLoop]: Abstraction has 1699 states and 2596 transitions. [2022-07-19 09:38:32,407 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) [2022-07-19 09:38:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2596 transitions. [2022-07-19 09:38:32,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-19 09:38:32,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:32,411 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] [2022-07-19 09:38:32,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:32,627 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 [2022-07-19 09:38:32,627 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2069259542, now seen corresponding path program 4 times [2022-07-19 09:38:32,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203023152] [2022-07-19 09:38:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:32,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:38:32,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:38:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:38:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:38:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:38:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:38:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:38:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:38:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:38:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:38:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:38:32,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203023152] [2022-07-19 09:38:32,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203023152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:32,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210112039] [2022-07-19 09:38:32,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:38:32,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:32,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:32,935 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) [2022-07-19 09:38:32,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 09:38:33,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:38:33,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:38:33,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:33,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-19 09:38:33,638 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 [2022-07-19 09:38:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:38:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:34,024 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 [2022-07-19 09:38:34,028 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 [2022-07-19 09:38:34,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210112039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:34,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:38:34,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2022-07-19 09:38:34,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409422403] [2022-07-19 09:38:34,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:34,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 09:38:34,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:34,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 09:38:34,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 09:38:34,080 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) [2022-07-19 09:38:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:49,838 INFO L93 Difference]: Finished difference Result 6811 states and 10477 transitions. [2022-07-19 09:38:49,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-07-19 09:38:49,838 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 117 [2022-07-19 09:38:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:49,848 INFO L225 Difference]: With dead ends: 6811 [2022-07-19 09:38:49,848 INFO L226 Difference]: Without dead ends: 6809 [2022-07-19 09:38:49,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12161 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3044, Invalid=32488, Unknown=0, NotChecked=0, Total=35532 [2022-07-19 09:38:49,851 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 494 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 3891 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 4796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 3891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:49,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1821 Invalid, 4796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 3891 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 09:38:49,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6809 states. [2022-07-19 09:38:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6809 to 793. [2022-07-19 09:38:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 626 states have (on average 1.340255591054313) internal successors, (839), 626 states have internal predecessors, (839), 149 states have call successors, (149), 17 states have call predecessors, (149), 17 states have return successors, (149), 149 states have call predecessors, (149), 149 states have call successors, (149) [2022-07-19 09:38:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1137 transitions. [2022-07-19 09:38:50,970 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1137 transitions. Word has length 117 [2022-07-19 09:38:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:50,970 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1137 transitions. [2022-07-19 09:38:50,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-07-19 09:38:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1137 transitions. [2022-07-19 09:38:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-19 09:38:50,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:50,973 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:51,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 09:38:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:51,203 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:51,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1511720767, now seen corresponding path program 8 times [2022-07-19 09:38:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:51,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930877913] [2022-07-19 09:38:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:51,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:38:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:38:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:38:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:38:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:38:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:38:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:38:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:38:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:38:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:38:51,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 09:38:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-19 09:38:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-19 09:38:51,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930877913] [2022-07-19 09:38:51,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930877913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:51,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185054822] [2022-07-19 09:38:51,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:38:51,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:51,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:51,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:51,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 09:38:51,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:38:51,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:51,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 09:38:51,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:51,746 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 [2022-07-19 09:38:51,812 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:38:51,812 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 [2022-07-19 09:38:51,886 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:51,887 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 [2022-07-19 09:38:51,940 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:51,940 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 [2022-07-19 09:38:52,021 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:52,021 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 [2022-07-19 09:38:52,076 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:38:52,077 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 [2022-07-19 09:38:52,332 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 [2022-07-19 09:38:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 112 proven. 191 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-07-19 09:38:52,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:52,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185054822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:52,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:38:52,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-07-19 09:38:52,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201154533] [2022-07-19 09:38:52,608 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:52,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 09:38:52,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:52,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 09:38:52,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 09:38:52,609 INFO L87 Difference]: Start difference. First operand 793 states and 1137 transitions. Second operand has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2022-07-19 09:38:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:55,828 INFO L93 Difference]: Finished difference Result 1103 states and 1567 transitions. [2022-07-19 09:38:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-19 09:38:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) Word has length 119 [2022-07-19 09:38:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:55,831 INFO L225 Difference]: With dead ends: 1103 [2022-07-19 09:38:55,831 INFO L226 Difference]: Without dead ends: 1101 [2022-07-19 09:38:55,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 149 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=670, Invalid=6812, Unknown=0, NotChecked=0, Total=7482 [2022-07-19 09:38:55,832 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 271 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:55,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1222 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1923 Invalid, 0 Unknown, 99 Unchecked, 0.8s Time] [2022-07-19 09:38:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-07-19 09:38:56,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 521. [2022-07-19 09:38:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 408 states have (on average 1.3259803921568627) internal successors, (541), 408 states have internal predecessors, (541), 96 states have call successors, (96), 16 states have call predecessors, (96), 16 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-19 09:38:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 733 transitions. [2022-07-19 09:38:56,743 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 733 transitions. Word has length 119 [2022-07-19 09:38:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:56,743 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 733 transitions. [2022-07-19 09:38:56,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.9722222222222223) internal successors, (143), 36 states have internal predecessors, (143), 15 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 15 states have call predecessors, (24), 15 states have call successors, (24) [2022-07-19 09:38:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 733 transitions. [2022-07-19 09:38:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-19 09:38:56,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:56,744 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:56,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-19 09:38:56,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-19 09:38:56,959 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:56,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:56,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1389871906, now seen corresponding path program 14 times [2022-07-19 09:38:56,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:56,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063061208] [2022-07-19 09:38:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:56,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:38:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:38:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:38:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:38:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 09:38:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-19 09:38:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:38:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-19 09:38:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 09:38:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-19 09:38:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 163 proven. 122 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:38:57,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063061208] [2022-07-19 09:38:57,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063061208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:57,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599810261] [2022-07-19 09:38:57,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:38:57,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:57,398 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:38:57,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 09:38:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:38:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:38:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 200 proven. 85 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:38:58,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 200 proven. 85 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-19 09:38:58,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599810261] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:58,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:58,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 61 [2022-07-19 09:38:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364666955] [2022-07-19 09:38:58,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-19 09:38:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-19 09:38:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=2826, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 09:38:58,828 INFO L87 Difference]: Start difference. First operand 521 states and 733 transitions. Second operand has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 61 states have internal predecessors, (239), 15 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 15 states have call predecessors, (30), 15 states have call successors, (30)