./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr4.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/pnr4.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 c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:35:45,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:35:45,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:35:45,670 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:35:45,670 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:35:45,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:35:45,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:35:45,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:35:45,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:35:45,676 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:35:45,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:35:45,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:35:45,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:35:45,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:35:45,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:35:45,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:35:45,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:35:45,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:35:45,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:35:45,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:35:45,685 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:35:45,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:35:45,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:35:45,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:35:45,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:35:45,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:35:45,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:35:45,704 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:35:45,705 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:35:45,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:35:45,706 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:35:45,706 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:35:45,707 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:35:45,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:35:45,709 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:35:45,710 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:35:45,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:35:45,712 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:35:45,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:35:45,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:35:45,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:35:45,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:35:45,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:35:45,750 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:35:45,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:35:45,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:35:45,753 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:35:45,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:35:45,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:35:45,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:35:45,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:35:45,755 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:35:45,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:35:45,756 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:35:45,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:35:45,757 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:35:45,758 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:35:45,758 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:35:45,758 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:35:45,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:35:45,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:35:45,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:35:45,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:35:45,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:35:45,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:35:45,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:35:45,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:35:45,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:35:45,760 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:35:45,760 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:35:45,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:35:45,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-07-19 09:35:45,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:35:46,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:35:46,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:35:46,014 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:35:46,015 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:35:46,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2022-07-19 09:35:46,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955763ec9/13eadb5cfc1d49be9c42ff1ccde777bb/FLAG314743c60 [2022-07-19 09:35:46,432 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:35:46,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2022-07-19 09:35:46,438 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955763ec9/13eadb5cfc1d49be9c42ff1ccde777bb/FLAG314743c60 [2022-07-19 09:35:46,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/955763ec9/13eadb5cfc1d49be9c42ff1ccde777bb [2022-07-19 09:35:46,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:35:46,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:35:46,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:35:46,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:35:46,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:35:46,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:35:46" (1/1) ... [2022-07-19 09:35:46,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270dc689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:46, skipping insertion in model container [2022-07-19 09:35:46,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:35:46" (1/1) ... [2022-07-19 09:35:46,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:35:46,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:35:46,999 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/pnr4.c[395,408] [2022-07-19 09:35:47,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:35:47,026 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:35:47,036 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/pnr4.c[395,408] [2022-07-19 09:35:47,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:35:47,053 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:35:47,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47 WrapperNode [2022-07-19 09:35:47,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:35:47,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:35:47,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:35:47,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:35:47,059 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,083 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-19 09:35:47,083 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:35:47,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:35:47,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:35:47,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:35:47,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:35:47,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:35:47,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:35:47,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:35:47,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (1/1) ... [2022-07-19 09:35:47,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:35:47,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:47,127 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 09:35:47,135 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 09:35:47,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:35:47,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:35:47,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:35:47,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 09:35:47,156 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-19 09:35:47,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-19 09:35:47,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:35:47,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:35:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:35:47,201 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:35:47,201 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:35:47,345 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:35:47,350 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:35:47,351 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 09:35:47,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:35:47 BoogieIcfgContainer [2022-07-19 09:35:47,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:35:47,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:35:47,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:35:47,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:35:47,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:35:46" (1/3) ... [2022-07-19 09:35:47,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441b58ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:35:47, skipping insertion in model container [2022-07-19 09:35:47,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:35:47" (2/3) ... [2022-07-19 09:35:47,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@441b58ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:35:47, skipping insertion in model container [2022-07-19 09:35:47,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:35:47" (3/3) ... [2022-07-19 09:35:47,359 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-07-19 09:35:47,369 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:35:47,370 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:35:47,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:35:47,411 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@6c6f1c28, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@698c5cbd [2022-07-19 09:35:47,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:35:47,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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 09:35:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 09:35:47,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:47,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:47,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:47,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:47,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2022-07-19 09:35:47,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:47,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573684903] [2022-07-19 09:35:47,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:47,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:47,709 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 09:35:47,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:47,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573684903] [2022-07-19 09:35:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573684903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:35:47,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 09:35:47,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 09:35:47,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701777591] [2022-07-19 09:35:47,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:35:47,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 09:35:47,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:47,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 09:35:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:35:47,744 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) 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 09:35:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:47,884 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2022-07-19 09:35:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 09:35:47,886 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 09:35:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:47,892 INFO L225 Difference]: With dead ends: 84 [2022-07-19 09:35:47,892 INFO L226 Difference]: Without dead ends: 44 [2022-07-19 09:35:47,895 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 09:35:47,900 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:47,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:35:47,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-19 09:35:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-07-19 09:35:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 09:35:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-19 09:35:47,957 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2022-07-19 09:35:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:47,957 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-19 09:35:47,958 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 09:35:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-19 09:35:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 09:35:47,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:47,961 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:47,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 09:35:47,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:47,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2022-07-19 09:35:47,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:47,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723065499] [2022-07-19 09:35:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:47,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:48,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723065499] [2022-07-19 09:35:48,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723065499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292080861] [2022-07-19 09:35:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:48,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:48,316 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 09:35:48,318 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 09:35:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:48,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:35:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:48,502 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 09:35:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:48,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:48,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:48,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:48,655 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 42 treesize of output 41 [2022-07-19 09:35:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:48,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:48,827 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 09:35:48,832 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 09:35:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:48,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292080861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:48,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:48,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-19 09:35:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297099940] [2022-07-19 09:35:48,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:48,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:35:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:48,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:35:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:35:48,867 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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 09:35:49,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:49,277 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2022-07-19 09:35:49,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:35:49,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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 37 [2022-07-19 09:35:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:49,281 INFO L225 Difference]: With dead ends: 102 [2022-07-19 09:35:49,282 INFO L226 Difference]: Without dead ends: 100 [2022-07-19 09:35:49,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:35:49,284 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:49,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 313 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:35:49,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-19 09:35:49,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-07-19 09:35:49,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 09:35:49,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-07-19 09:35:49,309 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 37 [2022-07-19 09:35:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:49,309 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-07-19 09:35:49,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 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 09:35:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-07-19 09:35:49,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 09:35:49,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:49,310 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:49,337 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 09:35:49,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:49,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:49,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:49,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2022-07-19 09:35:49,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:49,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609796615] [2022-07-19 09:35:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:49,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:49,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609796615] [2022-07-19 09:35:49,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609796615] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247391444] [2022-07-19 09:35:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:49,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:49,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:49,777 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 09:35:49,778 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 09:35:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:49,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:35:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:49,925 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 09:35:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:50,002 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 09:35:50,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:50,078 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 09:35:50,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:50,140 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 09:35:50,201 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 09:35:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:35:50,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:51,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-19 09:35:51,305 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 09:35:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:51,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247391444] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:51,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:51,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-19 09:35:51,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617443210] [2022-07-19 09:35:51,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:51,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:35:51,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:51,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:35:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:35:51,366 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 09:35:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:52,317 INFO L93 Difference]: Finished difference Result 172 states and 236 transitions. [2022-07-19 09:35:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:35:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 37 [2022-07-19 09:35:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:52,328 INFO L225 Difference]: With dead ends: 172 [2022-07-19 09:35:52,329 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 09:35:52,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 09:35:52,332 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 187 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:52,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 501 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 545 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-07-19 09:35:52,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 09:35:52,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2022-07-19 09:35:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 57 states have internal predecessors, (75), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-19 09:35:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2022-07-19 09:35:52,360 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 37 [2022-07-19 09:35:52,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:52,361 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2022-07-19 09:35:52,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 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 09:35:52,362 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2022-07-19 09:35:52,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:35:52,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:52,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:52,392 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 09:35:52,589 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 09:35:52,589 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:52,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:52,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2022-07-19 09:35:52,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:52,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311170352] [2022-07-19 09:35:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:52,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:52,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:52,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311170352] [2022-07-19 09:35:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311170352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:52,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732813991] [2022-07-19 09:35:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:52,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:52,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:52,764 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 09:35:52,774 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 09:35:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:52,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 09:35:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:52,865 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 09:35:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:52,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:35:52,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:52,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 09:35:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:52,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:53,052 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 09:35:53,054 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 09:35:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732813991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:53,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:53,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-19 09:35:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068168494] [2022-07-19 09:35:53,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 09:35:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 09:35:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-19 09:35:53,078 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 09:35:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:53,506 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2022-07-19 09:35:53,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 09:35:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 41 [2022-07-19 09:35:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:53,508 INFO L225 Difference]: With dead ends: 262 [2022-07-19 09:35:53,509 INFO L226 Difference]: Without dead ends: 260 [2022-07-19 09:35:53,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:35:53,510 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:53,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 362 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 09:35:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-19 09:35:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 125. [2022-07-19 09:35:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-19 09:35:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2022-07-19 09:35:53,535 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 41 [2022-07-19 09:35:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:53,535 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2022-07-19 09:35:53,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 09:35:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2022-07-19 09:35:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 09:35:53,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:53,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:53,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:35:53,751 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 09:35:53,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:53,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:53,752 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2022-07-19 09:35:53,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:53,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561795847] [2022-07-19 09:35:53,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:53,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:53,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561795847] [2022-07-19 09:35:53,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561795847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:53,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781182025] [2022-07-19 09:35:53,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:53,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:53,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:53,891 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 09:35:53,904 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 09:35:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:53,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 09:35:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:54,037 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 09:35:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:54,122 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 09:35:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:35:54,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-19 09:35:54,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-19 09:35:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 09:35:54,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:54,821 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 17 treesize of output 15 [2022-07-19 09:35:54,823 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 34 treesize of output 30 [2022-07-19 09:35:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:54,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781182025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:54,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:54,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-19 09:35:54,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54991641] [2022-07-19 09:35:54,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:54,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:35:54,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:54,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:35:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-19 09:35:54,887 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 09:35:55,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:55,808 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2022-07-19 09:35:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 09:35:55,809 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 41 [2022-07-19 09:35:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:55,811 INFO L225 Difference]: With dead ends: 366 [2022-07-19 09:35:55,811 INFO L226 Difference]: Without dead ends: 364 [2022-07-19 09:35:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 09:35:55,812 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 187 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 630 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 733 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-07-19 09:35:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-19 09:35:55,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 181. [2022-07-19 09:35:55,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 135 states have internal predecessors, (185), 45 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2022-07-19 09:35:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 275 transitions. [2022-07-19 09:35:55,841 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 275 transitions. Word has length 41 [2022-07-19 09:35:55,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:55,842 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 275 transitions. [2022-07-19 09:35:55,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 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 09:35:55,842 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 275 transitions. [2022-07-19 09:35:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 09:35:55,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:55,844 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:55,867 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 09:35:56,066 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 09:35:56,067 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:56,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:56,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2022-07-19 09:35:56,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:56,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604346005] [2022-07-19 09:35:56,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:56,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:56,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:56,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604346005] [2022-07-19 09:35:56,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604346005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:56,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066369737] [2022-07-19 09:35:56,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:35:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:56,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:56,154 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 09:35:56,156 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 09:35:56,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:35:56,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:35:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:35:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:56,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 09:35:56,277 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:35:56,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-19 09:35:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:56,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:35:56,402 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 09:35:56,404 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 09:35:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:56,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066369737] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:35:56,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:35:56,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-19 09:35:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512615941] [2022-07-19 09:35:56,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:35:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 09:35:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:35:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 09:35:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-19 09:35:56,432 INFO L87 Difference]: Start difference. First operand 181 states and 275 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 09:35:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:35:57,156 INFO L93 Difference]: Finished difference Result 1228 states and 1937 transitions. [2022-07-19 09:35:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:35:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2022-07-19 09:35:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:35:57,164 INFO L225 Difference]: With dead ends: 1228 [2022-07-19 09:35:57,164 INFO L226 Difference]: Without dead ends: 1226 [2022-07-19 09:35:57,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:35:57,166 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 99 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 09:35:57,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 414 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 09:35:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-07-19 09:35:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 402. [2022-07-19 09:35:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 294 states have (on average 1.435374149659864) internal successors, (422), 296 states have internal predecessors, (422), 104 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2022-07-19 09:35:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 630 transitions. [2022-07-19 09:35:57,250 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 630 transitions. Word has length 45 [2022-07-19 09:35:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:35:57,251 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 630 transitions. [2022-07-19 09:35:57,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-19 09:35:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 630 transitions. [2022-07-19 09:35:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 09:35:57,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:35:57,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:35:57,279 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 09:35:57,471 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 09:35:57,472 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:35:57,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:35:57,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2022-07-19 09:35:57,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:35:57,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421037818] [2022-07-19 09:35:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:57,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:35:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:35:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:35:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:35:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:35:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:35:57,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:35:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421037818] [2022-07-19 09:35:57,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421037818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:35:57,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329476039] [2022-07-19 09:35:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:35:57,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:35:57,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:35:57,572 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 09:35:57,574 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 09:35:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:35:57,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:35:57,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:35:57,731 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 09:35:57,802 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:35:57,803 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 09:35:57,906 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 09:35:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 09:35:57,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:00,055 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 09:36:00,057 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 09:36:00,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329476039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:00,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:00,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-19 09:36:00,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861537057] [2022-07-19 09:36:00,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:00,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:36:00,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:00,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:36:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2022-07-19 09:36:00,095 INFO L87 Difference]: Start difference. First operand 402 states and 630 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 09:36:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:00,897 INFO L93 Difference]: Finished difference Result 907 states and 1383 transitions. [2022-07-19 09:36:00,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 09:36:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2022-07-19 09:36:00,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:00,902 INFO L225 Difference]: With dead ends: 907 [2022-07-19 09:36:00,902 INFO L226 Difference]: Without dead ends: 905 [2022-07-19 09:36:00,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=328, Invalid=1833, Unknown=1, NotChecked=0, Total=2162 [2022-07-19 09:36:00,904 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 131 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:00,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 493 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 505 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-07-19 09:36:00,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-07-19 09:36:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 462. [2022-07-19 09:36:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 334 states have (on average 1.437125748502994) internal successors, (480), 341 states have internal predecessors, (480), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-19 09:36:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2022-07-19 09:36:00,969 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 45 [2022-07-19 09:36:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:00,970 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2022-07-19 09:36:00,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 09:36:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2022-07-19 09:36:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:36:00,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:00,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:00,990 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 09:36:01,183 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 09:36:01,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:01,184 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2022-07-19 09:36:01,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:01,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912112063] [2022-07-19 09:36:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:01,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:01,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:01,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:01,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:01,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:01,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:01,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912112063] [2022-07-19 09:36:01,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912112063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:01,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810161332] [2022-07-19 09:36:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:36:01,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:01,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:01,365 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 09:36:01,393 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 09:36:01,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 09:36:01,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:01,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:36:01,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:01,475 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 09:36:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:01,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:01,650 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 09:36:01,652 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 09:36:01,688 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:01,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810161332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:01,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:01,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-19 09:36:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109162248] [2022-07-19 09:36:01,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:01,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:36:01,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:36:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:36:01,689 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:36:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:03,478 INFO L93 Difference]: Finished difference Result 3755 states and 5968 transitions. [2022-07-19 09:36:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 09:36:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-07-19 09:36:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:03,495 INFO L225 Difference]: With dead ends: 3755 [2022-07-19 09:36:03,496 INFO L226 Difference]: Without dead ends: 3753 [2022-07-19 09:36:03,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 09:36:03,499 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 220 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:03,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 943 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 09:36:03,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-07-19 09:36:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1478. [2022-07-19 09:36:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1068 states have (on average 1.4691011235955056) internal successors, (1569), 1068 states have internal predecessors, (1569), 404 states have call successors, (404), 5 states have call predecessors, (404), 5 states have return successors, (404), 404 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-19 09:36:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2377 transitions. [2022-07-19 09:36:03,749 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2377 transitions. Word has length 49 [2022-07-19 09:36:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:03,750 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 2377 transitions. [2022-07-19 09:36:03,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:36:03,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2377 transitions. [2022-07-19 09:36:03,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 09:36:03,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:03,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:03,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:03,968 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 09:36:03,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2022-07-19 09:36:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:03,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756437004] [2022-07-19 09:36:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:04,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756437004] [2022-07-19 09:36:04,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756437004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:04,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225420222] [2022-07-19 09:36:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:04,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:04,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:04,164 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 09:36:04,165 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 09:36:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:04,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 09:36:04,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:04,305 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 09:36:04,450 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 09:36:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:04,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:04,568 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 09:36:04,570 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 09:36:04,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225420222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:04,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:04,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-19 09:36:04,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279605506] [2022-07-19 09:36:04,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:04,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 09:36:04,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:04,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 09:36:04,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-19 09:36:04,609 INFO L87 Difference]: Start difference. First operand 1478 states and 2377 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:36:06,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:06,020 INFO L93 Difference]: Finished difference Result 2639 states and 4171 transitions. [2022-07-19 09:36:06,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 09:36:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-07-19 09:36:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:06,031 INFO L225 Difference]: With dead ends: 2639 [2022-07-19 09:36:06,031 INFO L226 Difference]: Without dead ends: 2637 [2022-07-19 09:36:06,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 09:36:06,035 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 231 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:06,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 760 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 09:36:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-07-19 09:36:06,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 486. [2022-07-19 09:36:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 358 states have (on average 1.4189944134078212) internal successors, (508), 365 states have internal predecessors, (508), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-19 09:36:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 752 transitions. [2022-07-19 09:36:06,162 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 752 transitions. Word has length 49 [2022-07-19 09:36:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:06,162 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 752 transitions. [2022-07-19 09:36:06,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:36:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 752 transitions. [2022-07-19 09:36:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 09:36:06,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:06,164 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:06,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:06,387 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 09:36:06,387 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2022-07-19 09:36:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:06,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59177674] [2022-07-19 09:36:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:06,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:06,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:06,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:06,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59177674] [2022-07-19 09:36:06,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59177674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:06,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145882375] [2022-07-19 09:36:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:36:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:06,669 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 09:36:06,670 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 09:36:06,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:36:06,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:06,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 09:36:06,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:07,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:07,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 09:36:07,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145882375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:07,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:07,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2022-07-19 09:36:07,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696812561] [2022-07-19 09:36:07,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 09:36:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 09:36:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-07-19 09:36:07,307 INFO L87 Difference]: Start difference. First operand 486 states and 752 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 09:36:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:07,758 INFO L93 Difference]: Finished difference Result 769 states and 1180 transitions. [2022-07-19 09:36:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:36:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 53 [2022-07-19 09:36:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:07,762 INFO L225 Difference]: With dead ends: 769 [2022-07-19 09:36:07,762 INFO L226 Difference]: Without dead ends: 745 [2022-07-19 09:36:07,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 09:36:07,763 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 328 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:07,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 151 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:36:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-07-19 09:36:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 519. [2022-07-19 09:36:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 390 states have (on average 1.405128205128205) internal successors, (548), 390 states have internal predecessors, (548), 123 states have call successors, (123), 5 states have call predecessors, (123), 5 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-07-19 09:36:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 794 transitions. [2022-07-19 09:36:07,864 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 794 transitions. Word has length 53 [2022-07-19 09:36:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:07,865 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 794 transitions. [2022-07-19 09:36:07,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-19 09:36:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 794 transitions. [2022-07-19 09:36:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 09:36:07,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:07,867 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:07,892 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 09:36:08,087 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 09:36:08,087 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:08,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2022-07-19 09:36:08,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:08,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853827744] [2022-07-19 09:36:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:08,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:08,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:08,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853827744] [2022-07-19 09:36:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853827744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627308174] [2022-07-19 09:36:08,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:36:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:08,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:08,322 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 09:36:08,347 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 09:36:08,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:36:08,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:08,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:36:08,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:08,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 09:36:08,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,541 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 09:36:08,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,600 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 09:36:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,651 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 09:36:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,728 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 09:36:08,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,780 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 09:36:08,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,834 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 09:36:08,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:08,889 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 09:36:08,937 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 09:36:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 09:36:08,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:10,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627308174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:10,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:10,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-19 09:36:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441038668] [2022-07-19 09:36:10,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:10,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:36:10,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:10,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:36:10,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-19 09:36:10,340 INFO L87 Difference]: Start difference. First operand 519 states and 794 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:11,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:11,308 INFO L93 Difference]: Finished difference Result 992 states and 1490 transitions. [2022-07-19 09:36:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 09:36:11,309 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2022-07-19 09:36:11,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:11,315 INFO L225 Difference]: With dead ends: 992 [2022-07-19 09:36:11,315 INFO L226 Difference]: Without dead ends: 990 [2022-07-19 09:36:11,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=289, Invalid=1516, Unknown=1, NotChecked=0, Total=1806 [2022-07-19 09:36:11,317 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 142 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:11,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 571 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 690 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-07-19 09:36:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-07-19 09:36:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 571. [2022-07-19 09:36:11,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 422 states have (on average 1.4028436018957346) internal successors, (592), 426 states have internal predecessors, (592), 139 states have call successors, (139), 9 states have call predecessors, (139), 9 states have return successors, (139), 135 states have call predecessors, (139), 139 states have call successors, (139) [2022-07-19 09:36:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 870 transitions. [2022-07-19 09:36:11,455 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 870 transitions. Word has length 63 [2022-07-19 09:36:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:11,455 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 870 transitions. [2022-07-19 09:36:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 870 transitions. [2022-07-19 09:36:11,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 09:36:11,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:11,458 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:11,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:11,681 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 09:36:11,682 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2022-07-19 09:36:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:11,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709965219] [2022-07-19 09:36:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709965219] [2022-07-19 09:36:11,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709965219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388119529] [2022-07-19 09:36:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:36:11,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:11,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:11,872 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 09:36:11,873 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 09:36:11,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:36:11,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:36:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:12,004 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 09:36:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,056 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 09:36:12,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,109 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 09:36:12,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,202 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 26 treesize of output 25 [2022-07-19 09:36:12,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,251 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 26 treesize of output 25 [2022-07-19 09:36:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,298 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 26 treesize of output 25 [2022-07-19 09:36:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:36:12,345 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 26 treesize of output 25 [2022-07-19 09:36:12,420 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 09:36:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 09:36:12,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388119529] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:13,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:13,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-19 09:36:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596081629] [2022-07-19 09:36:13,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:13,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:36:13,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:13,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:36:13,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2022-07-19 09:36:13,438 INFO L87 Difference]: Start difference. First operand 571 states and 870 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:14,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:14,188 INFO L93 Difference]: Finished difference Result 1051 states and 1578 transitions. [2022-07-19 09:36:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 09:36:14,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2022-07-19 09:36:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:14,193 INFO L225 Difference]: With dead ends: 1051 [2022-07-19 09:36:14,193 INFO L226 Difference]: Without dead ends: 1049 [2022-07-19 09:36:14,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 87 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=1292, Unknown=1, NotChecked=0, Total=1560 [2022-07-19 09:36:14,195 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 123 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:14,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 508 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 526 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-07-19 09:36:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-07-19 09:36:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 651. [2022-07-19 09:36:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 478 states have (on average 1.405857740585774) internal successors, (672), 483 states have internal predecessors, (672), 161 states have call successors, (161), 11 states have call predecessors, (161), 11 states have return successors, (161), 156 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-19 09:36:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 994 transitions. [2022-07-19 09:36:14,356 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 994 transitions. Word has length 67 [2022-07-19 09:36:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 994 transitions. [2022-07-19 09:36:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 994 transitions. [2022-07-19 09:36:14,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 09:36:14,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:14,359 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:14,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:14,585 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 09:36:14,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1787147777, now seen corresponding path program 2 times [2022-07-19 09:36:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:14,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384130353] [2022-07-19 09:36:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:14,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384130353] [2022-07-19 09:36:14,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384130353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452328270] [2022-07-19 09:36:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:36:14,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:14,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:14,752 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 09:36:14,769 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 09:36:14,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:36:14,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:14,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 09:36:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:14,893 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 09:36:14,964 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:14,965 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 09:36:15,045 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:36:15,045 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 09:36:15,100 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:36:15,101 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 09:36:15,161 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:36:15,162 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 09:36:15,224 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-19 09:36:15,225 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 09:36:15,325 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 09:36:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 09:36:15,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:17,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452328270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:17,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:17,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-19 09:36:17,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886607469] [2022-07-19 09:36:17,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:17,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:36:17,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:17,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:36:17,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=511, Unknown=1, NotChecked=0, Total=600 [2022-07-19 09:36:17,494 INFO L87 Difference]: Start difference. First operand 651 states and 994 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:18,361 INFO L93 Difference]: Finished difference Result 790 states and 1187 transitions. [2022-07-19 09:36:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 09:36:18,361 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 71 [2022-07-19 09:36:18,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:18,365 INFO L225 Difference]: With dead ends: 790 [2022-07-19 09:36:18,365 INFO L226 Difference]: Without dead ends: 788 [2022-07-19 09:36:18,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=355, Invalid=1996, Unknown=1, NotChecked=0, Total=2352 [2022-07-19 09:36:18,366 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 218 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:18,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 507 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 651 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-07-19 09:36:18,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-07-19 09:36:18,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 507. [2022-07-19 09:36:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 368 states have (on average 1.3940217391304348) internal successors, (513), 373 states have internal predecessors, (513), 125 states have call successors, (125), 13 states have call predecessors, (125), 13 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-07-19 09:36:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 763 transitions. [2022-07-19 09:36:18,511 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 763 transitions. Word has length 71 [2022-07-19 09:36:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:18,512 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 763 transitions. [2022-07-19 09:36:18,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-19 09:36:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 763 transitions. [2022-07-19 09:36:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 09:36:18,514 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:18,514 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:18,540 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 09:36:18,737 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 09:36:18,737 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2022-07-19 09:36:18,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:18,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126239420] [2022-07-19 09:36:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:18,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:18,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126239420] [2022-07-19 09:36:18,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126239420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:18,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052943508] [2022-07-19 09:36:18,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:36:18,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:18,884 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 09:36:18,885 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 09:36:19,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 09:36:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:36:19,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:19,055 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 09:36:19,075 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:19,075 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 09:36:19,096 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:19,096 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 09:36:19,116 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:19,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-19 09:36:19,231 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:36:19,232 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 09:36:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:19,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:19,325 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 09:36:19,327 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 09:36:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:19,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052943508] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:19,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:19,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-19 09:36:19,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81526222] [2022-07-19 09:36:19,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:19,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 09:36:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 09:36:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-19 09:36:19,364 INFO L87 Difference]: Start difference. First operand 507 states and 763 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 09:36:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:23,626 INFO L93 Difference]: Finished difference Result 7151 states and 11484 transitions. [2022-07-19 09:36:23,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-19 09:36:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2022-07-19 09:36:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:23,656 INFO L225 Difference]: With dead ends: 7151 [2022-07-19 09:36:23,656 INFO L226 Difference]: Without dead ends: 7149 [2022-07-19 09:36:23,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=834, Invalid=6822, Unknown=0, NotChecked=0, Total=7656 [2022-07-19 09:36:23,661 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 251 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:23,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1278 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 2847 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 09:36:23,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2022-07-19 09:36:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 1236. [2022-07-19 09:36:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 894 states have (on average 1.4496644295302012) internal successors, (1296), 899 states have internal predecessors, (1296), 328 states have call successors, (328), 13 states have call predecessors, (328), 13 states have return successors, (328), 323 states have call predecessors, (328), 328 states have call successors, (328) [2022-07-19 09:36:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1952 transitions. [2022-07-19 09:36:24,194 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1952 transitions. Word has length 79 [2022-07-19 09:36:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:24,195 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1952 transitions. [2022-07-19 09:36:24,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-19 09:36:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1952 transitions. [2022-07-19 09:36:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 09:36:24,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:24,202 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:24,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:24,415 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 09:36:24,415 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2022-07-19 09:36:24,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:24,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617904828] [2022-07-19 09:36:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:24,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617904828] [2022-07-19 09:36:24,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617904828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:24,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285937345] [2022-07-19 09:36:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:24,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:24,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:24,608 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 09:36:24,609 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 09:36:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:24,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:36:24,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:24,842 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 09:36:24,920 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:24,921 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 09:36:24,984 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:24,984 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 09:36:25,045 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:25,046 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 09:36:25,237 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 09:36:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 09:36:25,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:28,403 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 09:36:28,405 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 34 treesize of output 30 [2022-07-19 09:36:28,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285937345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:28,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:28,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-19 09:36:28,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485855080] [2022-07-19 09:36:28,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:28,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 09:36:28,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:28,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 09:36:28,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=816, Unknown=1, NotChecked=0, Total=930 [2022-07-19 09:36:28,446 INFO L87 Difference]: Start difference. First operand 1236 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:36:32,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:32,592 INFO L93 Difference]: Finished difference Result 3102 states and 4895 transitions. [2022-07-19 09:36:32,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-19 09:36:32,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 79 [2022-07-19 09:36:32,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:32,606 INFO L225 Difference]: With dead ends: 3102 [2022-07-19 09:36:32,606 INFO L226 Difference]: Without dead ends: 3100 [2022-07-19 09:36:32,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 117 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=561, Invalid=4549, Unknown=2, NotChecked=0, Total=5112 [2022-07-19 09:36:32,609 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 273 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:32,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1126 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1672 Invalid, 0 Unknown, 167 Unchecked, 0.9s Time] [2022-07-19 09:36:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-07-19 09:36:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1441. [2022-07-19 09:36:33,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1040 states have (on average 1.4509615384615384) internal successors, (1509), 1045 states have internal predecessors, (1509), 381 states have call successors, (381), 19 states have call predecessors, (381), 19 states have return successors, (381), 376 states have call predecessors, (381), 381 states have call successors, (381) [2022-07-19 09:36:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2271 transitions. [2022-07-19 09:36:33,125 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2271 transitions. Word has length 79 [2022-07-19 09:36:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:33,126 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2271 transitions. [2022-07-19 09:36:33,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:36:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2271 transitions. [2022-07-19 09:36:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 09:36:33,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:33,129 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:33,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-19 09:36:33,334 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 09:36:33,335 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2022-07-19 09:36:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:33,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441920835] [2022-07-19 09:36:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:33,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:33,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441920835] [2022-07-19 09:36:33,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441920835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:33,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419883201] [2022-07-19 09:36:33,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:36:33,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:33,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:33,496 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 09:36:33,523 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 09:36:33,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 09:36:33,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:36:33,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:36:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:33,656 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 09:36:33,679 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:33,679 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 09:36:33,700 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:33,701 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 09:36:33,847 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:36:33,848 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 09:36:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:33,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:33,964 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 09:36:33,965 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 09:36:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:34,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419883201] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:36:34,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:36:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2022-07-19 09:36:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357260998] [2022-07-19 09:36:34,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:36:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:34,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:36:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-19 09:36:34,017 INFO L87 Difference]: Start difference. First operand 1441 states and 2271 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:48,146 INFO L93 Difference]: Finished difference Result 28344 states and 45860 transitions. [2022-07-19 09:36:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-07-19 09:36:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2022-07-19 09:36:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:48,233 INFO L225 Difference]: With dead ends: 28344 [2022-07-19 09:36:48,233 INFO L226 Difference]: Without dead ends: 28342 [2022-07-19 09:36:48,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 169 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16119 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2956, Invalid=34874, Unknown=0, NotChecked=0, Total=37830 [2022-07-19 09:36:48,251 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 377 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 7546 mSolverCounterSat, 1672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 9218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1672 IncrementalHoareTripleChecker+Valid, 7546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:48,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2739 Invalid, 9218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1672 Valid, 7546 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-19 09:36:48,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28342 states. [2022-07-19 09:36:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28342 to 3804. [2022-07-19 09:36:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 2738 states have (on average 1.4747991234477722) internal successors, (4038), 2743 states have internal predecessors, (4038), 1046 states have call successors, (1046), 19 states have call predecessors, (1046), 19 states have return successors, (1046), 1041 states have call predecessors, (1046), 1046 states have call successors, (1046) [2022-07-19 09:36:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 6130 transitions. [2022-07-19 09:36:49,940 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 6130 transitions. Word has length 83 [2022-07-19 09:36:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:36:49,940 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 6130 transitions. [2022-07-19 09:36:49,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-19 09:36:49,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 6130 transitions. [2022-07-19 09:36:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 09:36:49,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:36:49,946 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:36:49,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 09:36:50,159 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 09:36:50,159 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:36:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:36:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1710261727, now seen corresponding path program 1 times [2022-07-19 09:36:50,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:36:50,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91781435] [2022-07-19 09:36:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:50,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:36:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:36:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:36:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:36:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:36:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:36:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:36:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:36:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:36:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:36:50,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:36:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91781435] [2022-07-19 09:36:50,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91781435] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:50,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245014608] [2022-07-19 09:36:50,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:36:50,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:36:50,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:36:50,332 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 09:36:50,343 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 09:36:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:36:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:36:50,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:36:50,532 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 09:36:50,593 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:36:50,593 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 09:36:50,640 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:36:50,641 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 09:36:50,826 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 09:36:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-19 09:36:50,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:36:51,538 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 09:36:51,539 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 09:36:51,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245014608] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:36:51,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:36:51,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-19 09:36:51,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497724149] [2022-07-19 09:36:51,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:36:51,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 09:36:51,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:36:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 09:36:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 09:36:51,572 INFO L87 Difference]: Start difference. First operand 3804 states and 6130 transitions. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:36:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:36:59,866 INFO L93 Difference]: Finished difference Result 8724 states and 13979 transitions. [2022-07-19 09:36:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 09:36:59,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2022-07-19 09:36:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:36:59,888 INFO L225 Difference]: With dead ends: 8724 [2022-07-19 09:36:59,888 INFO L226 Difference]: Without dead ends: 8722 [2022-07-19 09:36:59,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=721, Invalid=6587, Unknown=2, NotChecked=0, Total=7310 [2022-07-19 09:36:59,892 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 293 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 09:36:59,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1069 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1730 Invalid, 0 Unknown, 173 Unchecked, 0.9s Time] [2022-07-19 09:36:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2022-07-19 09:37:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 3155. [2022-07-19 09:37:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2272 states have (on average 1.4669894366197183) internal successors, (3333), 2287 states have internal predecessors, (3333), 857 states have call successors, (857), 25 states have call predecessors, (857), 25 states have return successors, (857), 842 states have call predecessors, (857), 857 states have call successors, (857) [2022-07-19 09:37:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5047 transitions. [2022-07-19 09:37:00,917 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5047 transitions. Word has length 83 [2022-07-19 09:37:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:00,917 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5047 transitions. [2022-07-19 09:37:00,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:37:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5047 transitions. [2022-07-19 09:37:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 09:37:00,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:00,924 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:00,947 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 09:37:01,147 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 09:37:01,148 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:01,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash 511687486, now seen corresponding path program 1 times [2022-07-19 09:37:01,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310855829] [2022-07-19 09:37:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:37:01,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:37:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 09:37:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 09:37:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 09:37:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-19 09:37:01,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310855829] [2022-07-19 09:37:01,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310855829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178149788] [2022-07-19 09:37:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:01,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:01,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:01,428 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 09:37:01,457 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 09:37:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:37:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:01,590 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 09:37:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,664 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 09:37:01,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,720 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 09:37:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,774 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 09:37:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,838 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 09:37:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,893 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 09:37:01,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 09:37:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:01,993 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 09:37:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:02,082 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 09:37:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:02,135 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 09:37:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:02,185 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 09:37:02,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:37:02,247 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 09:37:02,302 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 09:37:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-19 09:37:02,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:03,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178149788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:03,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:03,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-19 09:37:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337224542] [2022-07-19 09:37:03,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 09:37:03,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 09:37:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=387, Unknown=1, NotChecked=0, Total=462 [2022-07-19 09:37:03,862 INFO L87 Difference]: Start difference. First operand 3155 states and 5047 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-19 09:37:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:05,553 INFO L93 Difference]: Finished difference Result 3349 states and 5259 transitions. [2022-07-19 09:37:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:37:05,553 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 89 [2022-07-19 09:37:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:05,562 INFO L225 Difference]: With dead ends: 3349 [2022-07-19 09:37:05,562 INFO L226 Difference]: Without dead ends: 3347 [2022-07-19 09:37:05,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=296, Invalid=1509, Unknown=1, NotChecked=0, Total=1806 [2022-07-19 09:37:05,565 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 141 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:05,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 471 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 617 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-19 09:37:05,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-07-19 09:37:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 1999. [2022-07-19 09:37:06,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1440 states have (on average 1.4479166666666667) internal successors, (2085), 1452 states have internal predecessors, (2085), 527 states have call successors, (527), 31 states have call predecessors, (527), 31 states have return successors, (527), 515 states have call predecessors, (527), 527 states have call successors, (527) [2022-07-19 09:37:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3139 transitions. [2022-07-19 09:37:06,583 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3139 transitions. Word has length 89 [2022-07-19 09:37:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 3139 transitions. [2022-07-19 09:37:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-19 09:37:06,584 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3139 transitions. [2022-07-19 09:37:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 09:37:06,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:06,589 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:06,615 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 09:37:06,813 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 09:37:06,813 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1965057965, now seen corresponding path program 7 times [2022-07-19 09:37:06,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:06,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401893162] [2022-07-19 09:37:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:37:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:37:06,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401893162] [2022-07-19 09:37:06,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401893162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:06,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546060307] [2022-07-19 09:37:06,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:37:06,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:06,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:06,976 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 09:37:06,985 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 09:37:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:07,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 09:37:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:07,129 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 09:37:07,149 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-19 09:37:07,149 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 09:37:07,315 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:37:07,315 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 09:37:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:37:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:07,403 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 09:37:07,405 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 09:37:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:37:07,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546060307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:37:07,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:37:07,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-07-19 09:37:07,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175933214] [2022-07-19 09:37:07,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:07,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 09:37:07,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 09:37:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-19 09:37:07,461 INFO L87 Difference]: Start difference. First operand 1999 states and 3139 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-19 09:37:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:37:35,931 INFO L93 Difference]: Finished difference Result 41151 states and 66583 transitions. [2022-07-19 09:37:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-19 09:37:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 87 [2022-07-19 09:37:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:37:36,061 INFO L225 Difference]: With dead ends: 41151 [2022-07-19 09:37:36,062 INFO L226 Difference]: Without dead ends: 41149 [2022-07-19 09:37:36,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37886 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5012, Invalid=80544, Unknown=0, NotChecked=0, Total=85556 [2022-07-19 09:37:36,085 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 505 mSDsluCounter, 4391 mSDsCounter, 0 mSdLazyCounter, 13515 mSolverCounterSat, 3053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 5331 SdHoareTripleChecker+Invalid, 16568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3053 IncrementalHoareTripleChecker+Valid, 13515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:37:36,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 5331 Invalid, 16568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3053 Valid, 13515 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-07-19 09:37:36,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41149 states. [2022-07-19 09:37:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41149 to 6546. [2022-07-19 09:37:39,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6546 states, 4698 states have (on average 1.4776500638569605) internal successors, (6942), 4707 states have internal predecessors, (6942), 1816 states have call successors, (1816), 31 states have call predecessors, (1816), 31 states have return successors, (1816), 1807 states have call predecessors, (1816), 1816 states have call successors, (1816) [2022-07-19 09:37:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6546 states to 6546 states and 10574 transitions. [2022-07-19 09:37:39,665 INFO L78 Accepts]: Start accepts. Automaton has 6546 states and 10574 transitions. Word has length 87 [2022-07-19 09:37:39,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:37:39,665 INFO L495 AbstractCegarLoop]: Abstraction has 6546 states and 10574 transitions. [2022-07-19 09:37:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-19 09:37:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6546 states and 10574 transitions. [2022-07-19 09:37:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-19 09:37:39,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:37:39,675 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:37:39,700 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 09:37:39,891 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 09:37:39,891 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:37:39,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:37:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1305526443, now seen corresponding path program 1 times [2022-07-19 09:37:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:37:39,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129337741] [2022-07-19 09:37:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:37:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:37:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:37:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:37:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:37:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:37:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:37:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:37:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:37:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:37:40,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:37:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129337741] [2022-07-19 09:37:40,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129337741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:40,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968735333] [2022-07-19 09:37:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:37:40,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:37:40,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:37:40,104 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 09:37:40,107 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 09:37:40,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:37:40,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:37:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:37:40,364 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 09:37:40,429 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-19 09:37:40,429 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 09:37:40,691 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 09:37:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 21 proven. 88 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-19 09:37:40,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:37:42,932 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 09:37:42,934 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 09:37:42,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968735333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:37:42,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:37:42,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-19 09:37:42,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40873999] [2022-07-19 09:37:42,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:37:42,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 09:37:42,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:37:42,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 09:37:42,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1198, Unknown=1, NotChecked=0, Total=1332 [2022-07-19 09:37:42,981 INFO L87 Difference]: Start difference. First operand 6546 states and 10574 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:38:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:03,477 INFO L93 Difference]: Finished difference Result 22723 states and 36577 transitions. [2022-07-19 09:38:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-19 09:38:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 87 [2022-07-19 09:38:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:03,528 INFO L225 Difference]: With dead ends: 22723 [2022-07-19 09:38:03,528 INFO L226 Difference]: Without dead ends: 22721 [2022-07-19 09:38:03,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=922, Invalid=9375, Unknown=5, NotChecked=0, Total=10302 [2022-07-19 09:38:03,536 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 404 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:03,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1347 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 2305 Invalid, 0 Unknown, 222 Unchecked, 1.4s Time] [2022-07-19 09:38:03,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22721 states. [2022-07-19 09:38:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22721 to 5117. [2022-07-19 09:38:06,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5117 states, 3688 states have (on average 1.466648590021692) internal successors, (5409), 3713 states have internal predecessors, (5409), 1379 states have call successors, (1379), 49 states have call predecessors, (1379), 49 states have return successors, (1379), 1354 states have call predecessors, (1379), 1379 states have call successors, (1379) [2022-07-19 09:38:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 8167 transitions. [2022-07-19 09:38:06,068 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 8167 transitions. Word has length 87 [2022-07-19 09:38:06,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:06,068 INFO L495 AbstractCegarLoop]: Abstraction has 5117 states and 8167 transitions. [2022-07-19 09:38:06,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-19 09:38:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 8167 transitions. [2022-07-19 09:38:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 09:38:06,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:06,078 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:06,103 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 09:38:06,303 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 09:38:06,304 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -304742602, now seen corresponding path program 1 times [2022-07-19 09:38:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788698107] [2022-07-19 09:38:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:06,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:38:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:38:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:38:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:38:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:38:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:38:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:38:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:38:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 09:38:06,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-19 09:38:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-19 09:38:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-19 09:38:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-19 09:38:06,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:06,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788698107] [2022-07-19 09:38:06,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788698107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:06,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175204404] [2022-07-19 09:38:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:06,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:06,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:06,544 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 09:38:06,569 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 09:38:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 09:38:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:06,724 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 09:38:06,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:06,780 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 09:38:06,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:06,824 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 09:38:06,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:06,893 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 26 treesize of output 25 [2022-07-19 09:38:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:06,935 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 26 treesize of output 25 [2022-07-19 09:38:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:06,977 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 26 treesize of output 25 [2022-07-19 09:38:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:07,020 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 26 treesize of output 25 [2022-07-19 09:38:07,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:07,087 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 26 treesize of output 25 [2022-07-19 09:38:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:07,134 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 26 treesize of output 25 [2022-07-19 09:38:07,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:07,187 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 26 treesize of output 25 [2022-07-19 09:38:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-19 09:38:07,243 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 26 treesize of output 25 [2022-07-19 09:38:07,319 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 09:38:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-19 09:38:07,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175204404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:08,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:38:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-19 09:38:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632362731] [2022-07-19 09:38:08,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:08,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 09:38:08,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:08,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 09:38:08,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2022-07-19 09:38:08,309 INFO L87 Difference]: Start difference. First operand 5117 states and 8167 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-19 09:38:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:38:11,397 INFO L93 Difference]: Finished difference Result 5447 states and 8500 transitions. [2022-07-19 09:38:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:38:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2022-07-19 09:38:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:38:11,406 INFO L225 Difference]: With dead ends: 5447 [2022-07-19 09:38:11,406 INFO L226 Difference]: Without dead ends: 5445 [2022-07-19 09:38:11,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=322, Invalid=1657, Unknown=1, NotChecked=0, Total=1980 [2022-07-19 09:38:11,408 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 140 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 09:38:11,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 483 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 657 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-19 09:38:11,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2022-07-19 09:38:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 1842. [2022-07-19 09:38:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1336 states have (on average 1.43937125748503) internal successors, (1923), 1348 states have internal predecessors, (1923), 475 states have call successors, (475), 30 states have call predecessors, (475), 30 states have return successors, (475), 463 states have call predecessors, (475), 475 states have call successors, (475) [2022-07-19 09:38:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2873 transitions. [2022-07-19 09:38:13,151 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2873 transitions. Word has length 93 [2022-07-19 09:38:13,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:38:13,152 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2873 transitions. [2022-07-19 09:38:13,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-19 09:38:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2873 transitions. [2022-07-19 09:38:13,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:38:13,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:38:13,155 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:38:13,181 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 09:38:13,371 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 09:38:13,371 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:38:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:38:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1859857993, now seen corresponding path program 8 times [2022-07-19 09:38:13,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:38:13,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206553763] [2022-07-19 09:38:13,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:38:13,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:38:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:38:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:38:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:38:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:38:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:38:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:38:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:38:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:38:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:38:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:38:13,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:38:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206553763] [2022-07-19 09:38:13,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206553763] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:38:13,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263276230] [2022-07-19 09:38:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:38:13,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:38:13,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:38:13,558 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 09:38:13,560 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 09:38:13,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:38:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:38:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 09:38:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:38:13,712 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 09:38:13,914 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-19 09:38:13,914 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 09:38:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:38:13,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:38:13,995 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 09:38:13,997 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 09:38:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:38:14,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263276230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:38:14,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:38:14,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2022-07-19 09:38:14,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365315730] [2022-07-19 09:38:14,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:38:14,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 09:38:14,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:38:14,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 09:38:14,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-19 09:38:14,056 INFO L87 Difference]: Start difference. First operand 1842 states and 2873 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:39:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:17,123 INFO L93 Difference]: Finished difference Result 39161 states and 62980 transitions. [2022-07-19 09:39:17,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 482 states. [2022-07-19 09:39:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2022-07-19 09:39:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:17,207 INFO L225 Difference]: With dead ends: 39161 [2022-07-19 09:39:17,207 INFO L226 Difference]: Without dead ends: 39159 [2022-07-19 09:39:17,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 183 SyntacticMatches, 7 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108315 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10015, Invalid=226667, Unknown=0, NotChecked=0, Total=236682 [2022-07-19 09:39:17,234 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 639 mSDsluCounter, 7363 mSDsCounter, 0 mSdLazyCounter, 22840 mSolverCounterSat, 5095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 8874 SdHoareTripleChecker+Invalid, 27935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5095 IncrementalHoareTripleChecker+Valid, 22840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:17,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 8874 Invalid, 27935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5095 Valid, 22840 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2022-07-19 09:39:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39159 states. [2022-07-19 09:39:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39159 to 7584. [2022-07-19 09:39:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7584 states, 5452 states have (on average 1.477072633895818) internal successors, (8053), 5455 states have internal predecessors, (8053), 2101 states have call successors, (2101), 30 states have call predecessors, (2101), 30 states have return successors, (2101), 2098 states have call predecessors, (2101), 2101 states have call successors, (2101) [2022-07-19 09:39:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7584 states to 7584 states and 12255 transitions. [2022-07-19 09:39:26,016 INFO L78 Accepts]: Start accepts. Automaton has 7584 states and 12255 transitions. Word has length 91 [2022-07-19 09:39:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:26,017 INFO L495 AbstractCegarLoop]: Abstraction has 7584 states and 12255 transitions. [2022-07-19 09:39:26,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:39:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 7584 states and 12255 transitions. [2022-07-19 09:39:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 09:39:26,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:26,023 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:39:26,047 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 09:39:26,247 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 09:39:26,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:39:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:39:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1015852491, now seen corresponding path program 1 times [2022-07-19 09:39:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:39:26,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053653747] [2022-07-19 09:39:26,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:26,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:39:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 09:39:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-19 09:39:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:39:26,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:39:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-19 09:39:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 09:39:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-19 09:39:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:39:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:39:26,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:39:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053653747] [2022-07-19 09:39:26,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053653747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635633293] [2022-07-19 09:39:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:39:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:39:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:39:26,461 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 09:39:26,463 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 09:39:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:39:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 09:39:26,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:39:26,731 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 09:39:27,063 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 09:39:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-19 09:39:27,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:39:27,334 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 09:39:27,336 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 09:39:27,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635633293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:39:27,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 09:39:27,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-19 09:39:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547436635] [2022-07-19 09:39:27,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 09:39:27,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 09:39:27,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:39:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 09:39:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:39:27,370 INFO L87 Difference]: Start difference. First operand 7584 states and 12255 transitions. Second operand has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 09:39:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:39:51,097 INFO L93 Difference]: Finished difference Result 17304 states and 27568 transitions. [2022-07-19 09:39:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-19 09:39:51,098 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-07-19 09:39:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:39:51,125 INFO L225 Difference]: With dead ends: 17304 [2022-07-19 09:39:51,125 INFO L226 Difference]: Without dead ends: 17302 [2022-07-19 09:39:51,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7117 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2375, Invalid=18795, Unknown=0, NotChecked=0, Total=21170 [2022-07-19 09:39:51,130 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 506 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 4161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 09:39:51,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1448 Invalid, 4161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 09:39:51,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17302 states. [2022-07-19 09:39:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17302 to 3613. [2022-07-19 09:39:55,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 2642 states have (on average 1.4542013626040877) internal successors, (3842), 2645 states have internal predecessors, (3842), 940 states have call successors, (940), 30 states have call predecessors, (940), 30 states have return successors, (940), 937 states have call predecessors, (940), 940 states have call successors, (940) [2022-07-19 09:39:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 5722 transitions. [2022-07-19 09:39:55,153 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 5722 transitions. Word has length 91 [2022-07-19 09:39:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:39:55,154 INFO L495 AbstractCegarLoop]: Abstraction has 3613 states and 5722 transitions. [2022-07-19 09:39:55,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-19 09:39:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 5722 transitions. [2022-07-19 09:39:55,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 09:39:55,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:39:55,161 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]