./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/rewnif.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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:27:42,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:27:42,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:27:42,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:27:42,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:27:42,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:27:42,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:27:42,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:27:42,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:27:42,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:27:42,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:27:42,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:27:42,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:27:42,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:27:42,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:27:42,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:27:42,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:27:42,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:27:42,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:27:42,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:27:42,795 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:27:42,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:27:42,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:27:42,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:27:42,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:27:42,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:27:42,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:27:42,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:27:42,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:27:42,802 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:27:42,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:27:42,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:27:42,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:27:42,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:27:42,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:27:42,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:27:42,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:27:42,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:27:42,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:27:42,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:27:42,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:27:42,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:27:42,810 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:27:42,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:27:42,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:27:42,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:27:42,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:27:42,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:27:42,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:27:42,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:27:42,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:27:42,828 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:27:42,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:27:42,829 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:27:42,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:27:42,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:27:42,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:27:42,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:27:42,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:27:42,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2022-07-11 22:27:43,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:27:43,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:27:43,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:27:43,059 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:27:43,059 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:27:43,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2022-07-11 22:27:43,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722514f35/c3b0d921d50444febfb47d08ac903c00/FLAGaecb622c4 [2022-07-11 22:27:43,438 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:27:43,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2022-07-11 22:27:43,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722514f35/c3b0d921d50444febfb47d08ac903c00/FLAGaecb622c4 [2022-07-11 22:27:43,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/722514f35/c3b0d921d50444febfb47d08ac903c00 [2022-07-11 22:27:43,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:27:43,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:27:43,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:27:43,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:27:43,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:27:43,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f95d88a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43, skipping insertion in model container [2022-07-11 22:27:43,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:27:43,486 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:27:43,619 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/rewnif.c[397,410] [2022-07-11 22:27:43,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:27:43,638 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:27:43,651 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/rewnif.c[397,410] [2022-07-11 22:27:43,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:27:43,674 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:27:43,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43 WrapperNode [2022-07-11 22:27:43,674 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:27:43,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:27:43,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:27:43,676 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:27:43,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,699 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-11 22:27:43,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:27:43,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:27:43,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:27:43,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:27:43,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:27:43,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:27:43,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:27:43,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:27:43,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (1/1) ... [2022-07-11 22:27:43,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:27:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:43,757 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) [2022-07-11 22:27:43,758 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 [2022-07-11 22:27:43,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:27:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:27:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:27:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 22:27:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:27:43,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:27:43,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:27:43,825 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:27:43,826 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:27:43,935 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:27:43,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:27:43,941 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:27:43,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:27:43 BoogieIcfgContainer [2022-07-11 22:27:43,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:27:43,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:27:43,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:27:43,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:27:43,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:27:43" (1/3) ... [2022-07-11 22:27:43,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7d2c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:27:43, skipping insertion in model container [2022-07-11 22:27:43,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:27:43" (2/3) ... [2022-07-11 22:27:43,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7d2c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:27:43, skipping insertion in model container [2022-07-11 22:27:43,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:27:43" (3/3) ... [2022-07-11 22:27:43,950 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2022-07-11 22:27:43,959 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:27:43,960 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:27:44,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:27:44,010 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@4136eb21, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57c463b0 [2022-07-11 22:27:44,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:27:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-07-11 22:27:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-11 22:27:44,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:44,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:44,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-11 22:27:44,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:44,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743355704] [2022-07-11 22:27:44,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743355704] [2022-07-11 22:27:44,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743355704] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:27:44,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:27:44,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:27:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459757987] [2022-07-11 22:27:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:27:44,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:27:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:27:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:27:44,187 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-11 22:27:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:44,198 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-11 22:27:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:27:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-07-11 22:27:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:44,205 INFO L225 Difference]: With dead ends: 29 [2022-07-11 22:27:44,205 INFO L226 Difference]: Without dead ends: 14 [2022-07-11 22:27:44,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:27:44,216 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:44,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:27:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-11 22:27:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-11 22:27:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-11 22:27:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-11 22:27:44,238 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-11 22:27:44,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:44,238 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-11 22:27:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-07-11 22:27:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-11 22:27:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-11 22:27:44,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:44,240 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:44,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:27:44,240 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-11 22:27:44,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565085510] [2022-07-11 22:27:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:44,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:44,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565085510] [2022-07-11 22:27:44,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565085510] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:27:44,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:27:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:27:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305899199] [2022-07-11 22:27:44,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:27:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:27:44,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:27:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:27:44,314 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-11 22:27:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:44,335 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-11 22:27:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:27:44,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-07-11 22:27:44,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:44,336 INFO L225 Difference]: With dead ends: 29 [2022-07-11 22:27:44,336 INFO L226 Difference]: Without dead ends: 18 [2022-07-11 22:27:44,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:27:44,337 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:44,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:27:44,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-11 22:27:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-11 22:27:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-11 22:27:44,341 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-11 22:27:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:44,341 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-11 22:27:44,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-07-11 22:27:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-11 22:27:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 22:27:44,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:44,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:44,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:27:44,343 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-11 22:27:44,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:44,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225922289] [2022-07-11 22:27:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:44,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225922289] [2022-07-11 22:27:44,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225922289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:44,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921021477] [2022-07-11 22:27:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:44,394 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) [2022-07-11 22:27:44,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:27:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:27:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:27:44,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921021477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:27:44,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:27:44,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 22:27:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080435436] [2022-07-11 22:27:44,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:44,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:27:44,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:27:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:27:44,554 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:44,622 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-07-11 22:27:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:27:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-11 22:27:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:44,623 INFO L225 Difference]: With dead ends: 34 [2022-07-11 22:27:44,624 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:27:44,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:27:44,625 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:44,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:27:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:27:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-11 22:27:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-07-11 22:27:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-11 22:27:44,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-11 22:27:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:44,629 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-11 22:27:44,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-11 22:27:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-11 22:27:44,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:44,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:44,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:27:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:44,849 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-11 22:27:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:44,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337496182] [2022-07-11 22:27:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:44,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337496182] [2022-07-11 22:27:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337496182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:44,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121929846] [2022-07-11 22:27:44,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:44,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:44,995 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) [2022-07-11 22:27:45,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:27:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:45,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-11 22:27:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:27:45,100 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 15 treesize of output 11 [2022-07-11 22:27:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:27:45,192 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 34 treesize of output 33 [2022-07-11 22:27:45,234 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 [2022-07-11 22:27:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:45,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:59,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-11 22:27:59,436 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 68 treesize of output 66 [2022-07-11 22:27:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:59,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121929846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:27:59,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:27:59,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-07-11 22:27:59,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578340364] [2022-07-11 22:27:59,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:59,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:27:59,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:27:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=178, Unknown=4, NotChecked=0, Total=240 [2022-07-11 22:27:59,485 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:59,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:59,647 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-11 22:27:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 22:27:59,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-11 22:27:59,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:59,649 INFO L225 Difference]: With dead ends: 28 [2022-07-11 22:27:59,649 INFO L226 Difference]: Without dead ends: 26 [2022-07-11 22:27:59,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=115, Invalid=301, Unknown=4, NotChecked=0, Total=420 [2022-07-11 22:27:59,653 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:59,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 100 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-07-11 22:27:59,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-11 22:27:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-11 22:27:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-11 22:27:59,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-11 22:27:59,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:59,666 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-11 22:27:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:27:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-11 22:27:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-11 22:27:59,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:59,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:59,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:27:59,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 22:27:59,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-11 22:27:59,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:59,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698147395] [2022-07-11 22:27:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:59,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698147395] [2022-07-11 22:27:59,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698147395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:59,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633256424] [2022-07-11 22:27:59,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:59,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:59,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:59,966 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) [2022-07-11 22:27:59,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:28:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 22:28:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:00,020 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 [2022-07-11 22:28:00,055 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 19 treesize of output 7 [2022-07-11 22:28:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:00,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:00,114 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 16 treesize of output 14 [2022-07-11 22:28:00,117 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 32 treesize of output 28 [2022-07-11 22:28:00,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:00,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633256424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:00,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:00,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-11 22:28:00,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377800936] [2022-07-11 22:28:00,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:00,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 22:28:00,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 22:28:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:28:00,150 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-07-11 22:28:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:00,299 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-11 22:28:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:28:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 20 [2022-07-11 22:28:00,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:00,302 INFO L225 Difference]: With dead ends: 60 [2022-07-11 22:28:00,302 INFO L226 Difference]: Without dead ends: 58 [2022-07-11 22:28:00,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:28:00,305 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:00,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-11 22:28:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-07-11 22:28:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-07-11 22:28:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-07-11 22:28:00,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-07-11 22:28:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:00,316 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-07-11 22:28:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-07-11 22:28:00,316 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-07-11 22:28:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 22:28:00,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:00,317 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:00,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:00,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:00,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:00,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-07-11 22:28:00,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:00,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317468] [2022-07-11 22:28:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:00,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317468] [2022-07-11 22:28:00,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:00,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867214304] [2022-07-11 22:28:00,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:28:00,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:00,583 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) [2022-07-11 22:28:00,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:28:00,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:00,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 22:28:00,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:28:00,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:00,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867214304] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:00,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:00,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-11 22:28:00,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711516456] [2022-07-11 22:28:00,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:00,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:28:00,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:28:00,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:28:00,731 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2022-07-11 22:28:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:00,820 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-07-11 22:28:00,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 22:28:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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 24 [2022-07-11 22:28:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:00,821 INFO L225 Difference]: With dead ends: 85 [2022-07-11 22:28:00,821 INFO L226 Difference]: Without dead ends: 47 [2022-07-11 22:28:00,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:28:00,823 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:00,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-11 22:28:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-07-11 22:28:00,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2022-07-11 22:28:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-11 22:28:00,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-07-11 22:28:00,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:00,829 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-11 22:28:00,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 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) [2022-07-11 22:28:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-11 22:28:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:28:00,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:00,830 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:00,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:01,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:01,043 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2022-07-11 22:28:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:01,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126289142] [2022-07-11 22:28:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126289142] [2022-07-11 22:28:01,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126289142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532721832] [2022-07-11 22:28:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:28:01,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:01,206 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) [2022-07-11 22:28:01,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:28:01,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 22:28:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:01,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:28:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:01,308 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 15 treesize of output 11 [2022-07-11 22:28:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:01,342 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 [2022-07-11 22:28:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:01,362 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 25 treesize of output 24 [2022-07-11 22:28:01,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:01,409 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 25 treesize of output 24 [2022-07-11 22:28:01,464 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 [2022-07-11 22:28:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:01,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:01,600 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 16 treesize of output 14 [2022-07-11 22:28:01,602 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 32 treesize of output 28 [2022-07-11 22:28:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:28:01,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532721832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:01,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:01,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-07-11 22:28:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520890943] [2022-07-11 22:28:01,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:01,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:28:01,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:28:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:28:01,620 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2022-07-11 22:28:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:01,839 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-07-11 22:28:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 22:28:01,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 28 [2022-07-11 22:28:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:01,839 INFO L225 Difference]: With dead ends: 55 [2022-07-11 22:28:01,840 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 22:28:01,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-07-11 22:28:01,840 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:01,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 22:28:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2022-07-11 22:28:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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) [2022-07-11 22:28:01,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-11 22:28:01,844 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-07-11 22:28:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:01,844 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-11 22:28:01,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2022-07-11 22:28:01,844 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-11 22:28:01,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-11 22:28:01,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:01,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:01,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:02,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:02,045 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:02,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2022-07-11 22:28:02,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:02,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010325353] [2022-07-11 22:28:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:02,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:02,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010325353] [2022-07-11 22:28:02,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010325353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:02,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989038651] [2022-07-11 22:28:02,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:28:02,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:02,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:02,147 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) [2022-07-11 22:28:02,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:28:02,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:28:02,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:02,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 22:28:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:02,210 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 [2022-07-11 22:28:02,260 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 [2022-07-11 22:28:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:02,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-11 22:28:02,342 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 32 treesize of output 28 [2022-07-11 22:28:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989038651] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:02,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:02,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-07-11 22:28:02,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256290702] [2022-07-11 22:28:02,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:02,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 22:28:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:02,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 22:28:02,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:28:02,367 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-07-11 22:28:02,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:02,560 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-11 22:28:02,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 22:28:02,561 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 28 [2022-07-11 22:28:02,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:02,561 INFO L225 Difference]: With dead ends: 72 [2022-07-11 22:28:02,561 INFO L226 Difference]: Without dead ends: 70 [2022-07-11 22:28:02,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:28:02,562 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:02,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-11 22:28:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2022-07-11 22:28:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:28:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-07-11 22:28:02,566 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2022-07-11 22:28:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:02,567 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-07-11 22:28:02,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-07-11 22:28:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-07-11 22:28:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 22:28:02,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:02,567 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:02,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:02,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:02,775 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:02,776 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2022-07-11 22:28:02,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:02,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225366610] [2022-07-11 22:28:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:02,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:02,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225366610] [2022-07-11 22:28:02,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225366610] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:02,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438836585] [2022-07-11 22:28:02,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:28:02,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:02,847 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) [2022-07-11 22:28:02,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:28:02,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 22:28:02,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:02,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 22:28:02,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:02,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438836585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:02,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:02,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-11 22:28:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12825842] [2022-07-11 22:28:02,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:02,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 22:28:02,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 22:28:02,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-11 22:28:02,992 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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) [2022-07-11 22:28:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:03,068 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-07-11 22:28:03,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:28:03,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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 32 [2022-07-11 22:28:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:03,069 INFO L225 Difference]: With dead ends: 82 [2022-07-11 22:28:03,069 INFO L226 Difference]: Without dead ends: 59 [2022-07-11 22:28:03,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:28:03,070 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:03,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:28:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-11 22:28:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-07-11 22:28:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:28:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-11 22:28:03,075 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2022-07-11 22:28:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:03,075 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-11 22:28:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 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) [2022-07-11 22:28:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-11 22:28:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 22:28:03,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:03,076 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:03,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:03,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:03,300 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 6 times [2022-07-11 22:28:03,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320056652] [2022-07-11 22:28:03,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:03,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:03,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:03,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320056652] [2022-07-11 22:28:03,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320056652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:03,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584545699] [2022-07-11 22:28:03,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:28:03,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:03,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:03,424 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) [2022-07-11 22:28:03,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:28:03,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:28:03,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:03,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 22:28:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:03,518 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 15 treesize of output 11 [2022-07-11 22:28:03,575 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:03,575 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 [2022-07-11 22:28:03,588 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:03,588 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 25 treesize of output 24 [2022-07-11 22:28:03,623 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:03,623 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 25 treesize of output 24 [2022-07-11 22:28:03,677 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 [2022-07-11 22:28:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:03,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:19,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-11 22:28:19,914 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 186 treesize of output 178 [2022-07-11 22:28:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:19,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584545699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:19,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:19,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 25 [2022-07-11 22:28:19,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436462242] [2022-07-11 22:28:19,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:19,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:28:19,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:19,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:28:19,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=492, Unknown=7, NotChecked=0, Total=600 [2022-07-11 22:28:19,965 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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) [2022-07-11 22:28:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:28,346 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2022-07-11 22:28:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 22:28:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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 36 [2022-07-11 22:28:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:28,346 INFO L225 Difference]: With dead ends: 95 [2022-07-11 22:28:28,347 INFO L226 Difference]: Without dead ends: 93 [2022-07-11 22:28:28,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=254, Invalid=1627, Unknown=11, NotChecked=0, Total=1892 [2022-07-11 22:28:28,348 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:28,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 144 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 352 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-07-11 22:28:28,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-11 22:28:28,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-11 22:28:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 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) [2022-07-11 22:28:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-11 22:28:28,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 36 [2022-07-11 22:28:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:28,353 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-11 22:28:28,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 states have internal predecessors, (67), 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) [2022-07-11 22:28:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-11 22:28:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 22:28:28,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:28,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:28,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:28:28,554 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 7 times [2022-07-11 22:28:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:28,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285658050] [2022-07-11 22:28:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:28,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:28,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285658050] [2022-07-11 22:28:28,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285658050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:28,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115448799] [2022-07-11 22:28:28,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:28:28,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:28,739 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) [2022-07-11 22:28:28,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:28:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 22:28:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:28,850 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 [2022-07-11 22:28:28,939 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 [2022-07-11 22:28:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:29,042 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 16 treesize of output 14 [2022-07-11 22:28:29,044 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 32 treesize of output 28 [2022-07-11 22:28:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:29,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115448799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:29,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:29,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-07-11 22:28:29,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441647081] [2022-07-11 22:28:29,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:29,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 22:28:29,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:29,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 22:28:29,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:28:29,084 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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) [2022-07-11 22:28:29,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:29,455 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-07-11 22:28:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-11 22:28:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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 36 [2022-07-11 22:28:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:29,455 INFO L225 Difference]: With dead ends: 104 [2022-07-11 22:28:29,456 INFO L226 Difference]: Without dead ends: 102 [2022-07-11 22:28:29,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 22:28:29,457 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:29,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 247 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:28:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-11 22:28:29,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2022-07-11 22:28:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 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) [2022-07-11 22:28:29,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-07-11 22:28:29,462 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 36 [2022-07-11 22:28:29,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:29,462 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-07-11 22:28:29,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 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) [2022-07-11 22:28:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-07-11 22:28:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 22:28:29,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:29,467 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:29,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:29,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:29,680 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 8 times [2022-07-11 22:28:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:29,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360221893] [2022-07-11 22:28:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:29,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:29,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:29,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360221893] [2022-07-11 22:28:29,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360221893] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:29,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411945779] [2022-07-11 22:28:29,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:28:29,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:29,767 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) [2022-07-11 22:28:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:28:29,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:28:29,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 22:28:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:29,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:29,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411945779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:29,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:29,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-11 22:28:29,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447442156] [2022-07-11 22:28:29,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:29,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:28:29,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:29,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:28:29,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:28:29,982 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:28:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:30,079 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-07-11 22:28:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-11 22:28:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-11 22:28:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:30,080 INFO L225 Difference]: With dead ends: 118 [2022-07-11 22:28:30,081 INFO L226 Difference]: Without dead ends: 91 [2022-07-11 22:28:30,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-07-11 22:28:30,081 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 67 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:30,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-11 22:28:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-07-11 22:28:30,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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) [2022-07-11 22:28:30,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-11 22:28:30,087 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 40 [2022-07-11 22:28:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:30,088 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-11 22:28:30,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:28:30,088 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-11 22:28:30,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 22:28:30,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:30,089 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:30,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:28:30,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1050876070, now seen corresponding path program 9 times [2022-07-11 22:28:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795165719] [2022-07-11 22:28:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:30,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795165719] [2022-07-11 22:28:30,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795165719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609120799] [2022-07-11 22:28:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:28:30,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:30,486 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) [2022-07-11 22:28:30,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:28:30,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:28:30,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 22:28:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:30,615 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 15 treesize of output 11 [2022-07-11 22:28:30,638 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:30,638 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 [2022-07-11 22:28:30,650 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:30,650 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 25 treesize of output 24 [2022-07-11 22:28:30,666 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:30,666 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 [2022-07-11 22:28:30,678 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:30,678 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 25 treesize of output 24 [2022-07-11 22:28:30,693 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:30,694 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 [2022-07-11 22:28:30,704 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:30,704 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 25 treesize of output 24 [2022-07-11 22:28:30,731 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:30,731 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 25 treesize of output 24 [2022-07-11 22:28:30,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:28:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:30,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:30,983 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 16 treesize of output 14 [2022-07-11 22:28:30,985 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 32 treesize of output 28 [2022-07-11 22:28:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-11 22:28:31,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609120799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:31,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:31,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 21 [2022-07-11 22:28:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203434787] [2022-07-11 22:28:31,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:28:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:28:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-07-11 22:28:31,007 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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) [2022-07-11 22:28:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:31,387 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-07-11 22:28:31,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 22:28:31,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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 44 [2022-07-11 22:28:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:31,388 INFO L225 Difference]: With dead ends: 105 [2022-07-11 22:28:31,388 INFO L226 Difference]: Without dead ends: 103 [2022-07-11 22:28:31,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 71 SyntacticMatches, 17 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 22:28:31,389 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:31,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 243 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:28:31,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-11 22:28:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 53. [2022-07-11 22:28:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 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) [2022-07-11 22:28:31,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-11 22:28:31,394 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2022-07-11 22:28:31,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:31,394 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-11 22:28:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 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) [2022-07-11 22:28:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-11 22:28:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 22:28:31,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:31,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:31,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:31,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:28:31,612 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 10 times [2022-07-11 22:28:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:31,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204576054] [2022-07-11 22:28:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:31,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:31,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204576054] [2022-07-11 22:28:31,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204576054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:31,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612523004] [2022-07-11 22:28:31,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:28:31,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:31,839 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) [2022-07-11 22:28:31,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:28:31,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:28:31,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:31,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-11 22:28:31,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:31,944 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 15 treesize of output 11 [2022-07-11 22:28:31,981 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:31,981 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 [2022-07-11 22:28:31,991 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:31,991 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 25 treesize of output 24 [2022-07-11 22:28:32,019 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:32,019 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 25 treesize of output 24 [2022-07-11 22:28:32,125 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 [2022-07-11 22:28:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:32,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:50,377 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 16 treesize of output 14 [2022-07-11 22:28:50,379 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 32 treesize of output 28 [2022-07-11 22:28:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:50,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612523004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:50,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:50,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 34 [2022-07-11 22:28:50,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206244278] [2022-07-11 22:28:50,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:28:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:50,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:28:50,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=968, Unknown=8, NotChecked=0, Total=1122 [2022-07-11 22:28:50,424 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2022-07-11 22:28:50,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:50,860 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2022-07-11 22:28:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:28:50,861 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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 44 [2022-07-11 22:28:50,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:50,861 INFO L225 Difference]: With dead ends: 77 [2022-07-11 22:28:50,861 INFO L226 Difference]: Without dead ends: 75 [2022-07-11 22:28:50,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=287, Invalid=1867, Unknown=8, NotChecked=0, Total=2162 [2022-07-11 22:28:50,862 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:50,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 263 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 729 Invalid, 0 Unknown, 29 Unchecked, 0.3s Time] [2022-07-11 22:28:50,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-11 22:28:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2022-07-11 22:28:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2022-07-11 22:28:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-11 22:28:50,867 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2022-07-11 22:28:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:50,867 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-11 22:28:50,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2022-07-11 22:28:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-11 22:28:50,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-11 22:28:50,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:50,868 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:50,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:51,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:28:51,076 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:51,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 11 times [2022-07-11 22:28:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:51,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548084551] [2022-07-11 22:28:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:51,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548084551] [2022-07-11 22:28:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548084551] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44535646] [2022-07-11 22:28:51,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:28:51,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:51,272 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) [2022-07-11 22:28:51,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:28:51,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-11 22:28:51,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:51,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-11 22:28:51,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:51,420 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 [2022-07-11 22:28:51,556 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 [2022-07-11 22:28:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:51,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:51,702 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 16 treesize of output 14 [2022-07-11 22:28:51,703 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 32 treesize of output 28 [2022-07-11 22:28:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:51,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44535646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:51,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:51,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-07-11 22:28:51,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368614287] [2022-07-11 22:28:51,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:51,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 22:28:51,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:51,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 22:28:51,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-07-11 22:28:51,739 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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) [2022-07-11 22:28:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:52,273 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-07-11 22:28:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-11 22:28:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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 44 [2022-07-11 22:28:52,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:52,273 INFO L225 Difference]: With dead ends: 96 [2022-07-11 22:28:52,273 INFO L226 Difference]: Without dead ends: 94 [2022-07-11 22:28:52,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2022-07-11 22:28:52,275 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:52,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 247 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:28:52,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-11 22:28:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-07-11 22:28:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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) [2022-07-11 22:28:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-11 22:28:52,281 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 44 [2022-07-11 22:28:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:52,281 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-11 22:28:52,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 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) [2022-07-11 22:28:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-11 22:28:52,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-11 22:28:52,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:52,282 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:52,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:52,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 22:28:52,483 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:52,484 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 12 times [2022-07-11 22:28:52,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:52,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761814929] [2022-07-11 22:28:52,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:52,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761814929] [2022-07-11 22:28:52,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761814929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:52,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603264295] [2022-07-11 22:28:52,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:28:52,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:52,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:52,568 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) [2022-07-11 22:28:52,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:28:52,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:28:52,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 22:28:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:52,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:52,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603264295] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:52,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:52,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-11 22:28:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73580793] [2022-07-11 22:28:52,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:28:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:52,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:28:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:28:52,817 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2022-07-11 22:28:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:52,934 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-07-11 22:28:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:28:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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 48 [2022-07-11 22:28:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:52,935 INFO L225 Difference]: With dead ends: 114 [2022-07-11 22:28:52,935 INFO L226 Difference]: Without dead ends: 83 [2022-07-11 22:28:52,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-07-11 22:28:52,936 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:52,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 75 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:28:52,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-11 22:28:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-07-11 22:28:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 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) [2022-07-11 22:28:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-11 22:28:52,943 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-07-11 22:28:52,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:52,943 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-11 22:28:52,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 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) [2022-07-11 22:28:52,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-11 22:28:52,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 22:28:52,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:52,945 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:52,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:53,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:53,150 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:53,150 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 13 times [2022-07-11 22:28:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367372503] [2022-07-11 22:28:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:53,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367372503] [2022-07-11 22:28:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367372503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851683009] [2022-07-11 22:28:53,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:28:53,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:53,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:53,391 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) [2022-07-11 22:28:53,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 22:28:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-11 22:28:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:53,525 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 15 treesize of output 11 [2022-07-11 22:28:53,566 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:53,567 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 [2022-07-11 22:28:53,578 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:53,578 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 25 treesize of output 24 [2022-07-11 22:28:53,616 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:28:53,617 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 25 treesize of output 24 [2022-07-11 22:28:53,745 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 [2022-07-11 22:28:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:16,347 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_217| Int) (v_ArrVal_547 Int) (v_ArrVal_546 Int)) (or (<= 4 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_546) (+ (* |v_ULTIMATE.start_main_~i~0#1_217| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_547) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_217|)))) is different from false [2022-07-11 22:29:17,636 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 16 treesize of output 14 [2022-07-11 22:29:17,638 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 32 treesize of output 28 [2022-07-11 22:29:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 114 refuted. 2 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-11 22:29:17,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851683009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:17,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:17,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 19] total 40 [2022-07-11 22:29:17,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158493003] [2022-07-11 22:29:17,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:17,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:29:17,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:17,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:29:17,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1324, Unknown=12, NotChecked=74, Total=1560 [2022-07-11 22:29:17,701 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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) [2022-07-11 22:29:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:18,241 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-07-11 22:29:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 22:29:18,242 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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 52 [2022-07-11 22:29:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:18,242 INFO L225 Difference]: With dead ends: 84 [2022-07-11 22:29:18,242 INFO L226 Difference]: Without dead ends: 82 [2022-07-11 22:29:18,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 78 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=300, Invalid=2554, Unknown=12, NotChecked=104, Total=2970 [2022-07-11 22:29:18,243 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:18,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 218 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 675 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-07-11 22:29:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-11 22:29:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2022-07-11 22:29:18,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2022-07-11 22:29:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-11 22:29:18,250 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2022-07-11 22:29:18,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:18,250 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-11 22:29:18,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 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) [2022-07-11 22:29:18,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-11 22:29:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 22:29:18,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:18,251 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:18,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:18,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 22:29:18,469 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:18,469 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 14 times [2022-07-11 22:29:18,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:18,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564045269] [2022-07-11 22:29:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:18,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:18,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:18,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564045269] [2022-07-11 22:29:18,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564045269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:18,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598807571] [2022-07-11 22:29:18,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:29:18,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:18,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:18,626 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) [2022-07-11 22:29:18,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 22:29:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:29:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-11 22:29:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:18,729 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 [2022-07-11 22:29:18,844 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 [2022-07-11 22:29:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:18,917 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 16 treesize of output 14 [2022-07-11 22:29:18,920 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 32 treesize of output 28 [2022-07-11 22:29:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:18,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598807571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:18,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:18,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-07-11 22:29:18,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497350225] [2022-07-11 22:29:18,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:18,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 22:29:18,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:18,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 22:29:18,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-07-11 22:29:18,977 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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) [2022-07-11 22:29:19,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:19,464 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-07-11 22:29:19,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-11 22:29:19,464 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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 52 [2022-07-11 22:29:19,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:19,464 INFO L225 Difference]: With dead ends: 108 [2022-07-11 22:29:19,464 INFO L226 Difference]: Without dead ends: 106 [2022-07-11 22:29:19,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 22:29:19,465 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:19,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 268 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:29:19,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-11 22:29:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2022-07-11 22:29:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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) [2022-07-11 22:29:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-07-11 22:29:19,473 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2022-07-11 22:29:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:19,473 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-07-11 22:29:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 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) [2022-07-11 22:29:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-07-11 22:29:19,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 22:29:19,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:19,474 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:19,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:19,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 22:29:19,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:19,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 15 times [2022-07-11 22:29:19,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161352701] [2022-07-11 22:29:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:19,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161352701] [2022-07-11 22:29:19,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161352701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620339013] [2022-07-11 22:29:19,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:29:19,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:19,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:19,786 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) [2022-07-11 22:29:19,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 22:29:19,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-11 22:29:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:19,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 22:29:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:20,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:20,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620339013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:20,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:20,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-11 22:29:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278766589] [2022-07-11 22:29:20,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:20,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:29:20,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:20,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:29:20,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-11 22:29:20,116 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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) [2022-07-11 22:29:20,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:20,284 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-07-11 22:29:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 22:29:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 56 [2022-07-11 22:29:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:20,284 INFO L225 Difference]: With dead ends: 130 [2022-07-11 22:29:20,284 INFO L226 Difference]: Without dead ends: 95 [2022-07-11 22:29:20,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-07-11 22:29:20,285 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 122 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:20,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 136 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:29:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-11 22:29:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2022-07-11 22:29:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 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) [2022-07-11 22:29:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-11 22:29:20,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-07-11 22:29:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:20,293 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-11 22:29:20,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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) [2022-07-11 22:29:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-11 22:29:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 22:29:20,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:20,294 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:20,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:20,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:20,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:20,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 16 times [2022-07-11 22:29:20,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:20,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297023851] [2022-07-11 22:29:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:20,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:20,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297023851] [2022-07-11 22:29:20,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297023851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:20,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199491810] [2022-07-11 22:29:20,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:29:20,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:20,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:20,717 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) [2022-07-11 22:29:20,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 22:29:20,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:29:20,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:29:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:20,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:29:20,850 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:29:20,850 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 [2022-07-11 22:29:20,870 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:20,871 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 25 treesize of output 24 [2022-07-11 22:29:20,902 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:20,903 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 25 treesize of output 24 [2022-07-11 22:29:21,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:29:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:21,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:21,190 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 16 treesize of output 14 [2022-07-11 22:29:21,192 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 32 treesize of output 28 [2022-07-11 22:29:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:29:21,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199491810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:21,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:21,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 27 [2022-07-11 22:29:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48614350] [2022-07-11 22:29:21,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:21,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 22:29:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 22:29:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:29:21,240 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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) [2022-07-11 22:29:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:21,738 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-07-11 22:29:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-11 22:29:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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 60 [2022-07-11 22:29:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:21,743 INFO L225 Difference]: With dead ends: 103 [2022-07-11 22:29:21,744 INFO L226 Difference]: Without dead ends: 101 [2022-07-11 22:29:21,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 22:29:21,744 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:21,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 315 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:29:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-11 22:29:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2022-07-11 22:29:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 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) [2022-07-11 22:29:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-11 22:29:21,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2022-07-11 22:29:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:21,753 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-11 22:29:21,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 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) [2022-07-11 22:29:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-11 22:29:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 22:29:21,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:21,754 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:21,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:21,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:21,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:21,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 17 times [2022-07-11 22:29:21,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:21,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065650353] [2022-07-11 22:29:21,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:21,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065650353] [2022-07-11 22:29:22,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065650353] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:22,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803424807] [2022-07-11 22:29:22,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:29:22,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:22,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:22,153 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) [2022-07-11 22:29:22,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-11 22:29:22,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-11 22:29:22,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:22,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-11 22:29:22,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:22,321 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 [2022-07-11 22:29:22,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:29:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:22,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:22,550 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 16 treesize of output 14 [2022-07-11 22:29:22,552 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 32 treesize of output 28 [2022-07-11 22:29:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:22,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803424807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:22,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:22,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 26 [2022-07-11 22:29:22,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544027427] [2022-07-11 22:29:22,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:22,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:29:22,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:22,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:29:22,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:29:22,618 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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) [2022-07-11 22:29:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:23,208 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-07-11 22:29:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-11 22:29:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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 60 [2022-07-11 22:29:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:23,208 INFO L225 Difference]: With dead ends: 120 [2022-07-11 22:29:23,209 INFO L226 Difference]: Without dead ends: 118 [2022-07-11 22:29:23,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 22:29:23,210 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:23,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 342 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:29:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-11 22:29:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2022-07-11 22:29:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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) [2022-07-11 22:29:23,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-07-11 22:29:23,219 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2022-07-11 22:29:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:23,220 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-07-11 22:29:23,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 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) [2022-07-11 22:29:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-07-11 22:29:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 22:29:23,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:23,220 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:23,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:23,430 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 18 times [2022-07-11 22:29:23,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:23,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827954587] [2022-07-11 22:29:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:23,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:23,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:23,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827954587] [2022-07-11 22:29:23,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827954587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600197044] [2022-07-11 22:29:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:29:23,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:23,545 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) [2022-07-11 22:29:23,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-11 22:29:23,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-11 22:29:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:29:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:23,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:23,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600197044] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:23,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:23,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2022-07-11 22:29:23,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608693762] [2022-07-11 22:29:23,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:23,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-11 22:29:23,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:23,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-11 22:29:23,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-07-11 22:29:23,948 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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) [2022-07-11 22:29:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:24,102 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-07-11 22:29:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:29:24,103 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 64 [2022-07-11 22:29:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:24,103 INFO L225 Difference]: With dead ends: 146 [2022-07-11 22:29:24,103 INFO L226 Difference]: Without dead ends: 107 [2022-07-11 22:29:24,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 22:29:24,104 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:24,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 113 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:29:24,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-11 22:29:24,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-07-11 22:29:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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) [2022-07-11 22:29:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-07-11 22:29:24,114 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2022-07-11 22:29:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:24,114 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-07-11 22:29:24,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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) [2022-07-11 22:29:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-07-11 22:29:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 22:29:24,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:24,115 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:24,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:24,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-11 22:29:24,315 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:24,316 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 19 times [2022-07-11 22:29:24,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:24,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147692205] [2022-07-11 22:29:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:24,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:24,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147692205] [2022-07-11 22:29:24,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147692205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:24,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948992096] [2022-07-11 22:29:24,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:29:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:24,546 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) [2022-07-11 22:29:24,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-11 22:29:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-11 22:29:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:24,686 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 15 treesize of output 11 [2022-07-11 22:29:24,717 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:29:24,717 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 [2022-07-11 22:29:24,733 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:24,733 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 25 treesize of output 24 [2022-07-11 22:29:24,761 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:24,761 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 25 treesize of output 24 [2022-07-11 22:29:24,908 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 [2022-07-11 22:29:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:24,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:25,102 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 16 treesize of output 14 [2022-07-11 22:29:25,104 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 32 treesize of output 28 [2022-07-11 22:29:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:29:25,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948992096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:25,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:25,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 31 [2022-07-11 22:29:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712228717] [2022-07-11 22:29:25,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-11 22:29:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-11 22:29:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-07-11 22:29:25,161 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 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) [2022-07-11 22:29:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:25,807 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2022-07-11 22:29:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-11 22:29:25,808 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 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 68 [2022-07-11 22:29:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:25,808 INFO L225 Difference]: With dead ends: 115 [2022-07-11 22:29:25,808 INFO L226 Difference]: Without dead ends: 113 [2022-07-11 22:29:25,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2022-07-11 22:29:25,809 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:25,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 409 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:29:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-11 22:29:25,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2022-07-11 22:29:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 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) [2022-07-11 22:29:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-11 22:29:25,820 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2022-07-11 22:29:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:25,820 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-11 22:29:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 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) [2022-07-11 22:29:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-11 22:29:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-11 22:29:25,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:25,820 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:25,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:26,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-11 22:29:26,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:26,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 20 times [2022-07-11 22:29:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:26,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017856187] [2022-07-11 22:29:26,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:26,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017856187] [2022-07-11 22:29:26,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017856187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:26,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131794560] [2022-07-11 22:29:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:29:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:26,232 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) [2022-07-11 22:29:26,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-11 22:29:26,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:29:26,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:26,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:29:26,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:26,371 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 [2022-07-11 22:29:26,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:29:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:26,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:26,666 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 16 treesize of output 14 [2022-07-11 22:29:26,668 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 32 treesize of output 28 [2022-07-11 22:29:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:26,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131794560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:26,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:26,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-07-11 22:29:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332893970] [2022-07-11 22:29:26,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:26,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 22:29:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:26,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 22:29:26,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-07-11 22:29:26,731 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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) [2022-07-11 22:29:27,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:27,384 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-07-11 22:29:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 22:29:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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 68 [2022-07-11 22:29:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:27,385 INFO L225 Difference]: With dead ends: 132 [2022-07-11 22:29:27,385 INFO L226 Difference]: Without dead ends: 130 [2022-07-11 22:29:27,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2022-07-11 22:29:27,386 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 90 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:27,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 389 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:29:27,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-11 22:29:27,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2022-07-11 22:29:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 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) [2022-07-11 22:29:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-11 22:29:27,399 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2022-07-11 22:29:27,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:27,399 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-11 22:29:27,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 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) [2022-07-11 22:29:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-11 22:29:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-11 22:29:27,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:27,400 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:27,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-11 22:29:27,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:27,600 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 21 times [2022-07-11 22:29:27,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:27,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888949951] [2022-07-11 22:29:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:27,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:27,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888949951] [2022-07-11 22:29:27,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888949951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:27,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901052334] [2022-07-11 22:29:27,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:29:27,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:27,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:27,741 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:27,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-11 22:29:27,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 22:29:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 22:29:27,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:28,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901052334] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:28,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:28,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-07-11 22:29:28,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121777848] [2022-07-11 22:29:28,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-11 22:29:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-11 22:29:28,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2022-07-11 22:29:28,182 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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) [2022-07-11 22:29:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:28,375 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2022-07-11 22:29:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:29:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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 72 [2022-07-11 22:29:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:28,376 INFO L225 Difference]: With dead ends: 162 [2022-07-11 22:29:28,376 INFO L226 Difference]: Without dead ends: 119 [2022-07-11 22:29:28,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:29:28,377 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:28,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 147 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:29:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-11 22:29:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2022-07-11 22:29:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 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) [2022-07-11 22:29:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-11 22:29:28,399 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 72 [2022-07-11 22:29:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:28,399 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-11 22:29:28,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 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) [2022-07-11 22:29:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-11 22:29:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-11 22:29:28,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:28,400 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:28,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:28,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:28,611 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:28,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:28,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 22 times [2022-07-11 22:29:28,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:28,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301666140] [2022-07-11 22:29:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:28,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:28,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301666140] [2022-07-11 22:29:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301666140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827390649] [2022-07-11 22:29:28,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:29:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:28,891 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:28,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-11 22:29:28,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:29:28,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-11 22:29:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:29,040 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 15 treesize of output 11 [2022-07-11 22:29:29,071 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:29:29,071 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 [2022-07-11 22:29:29,091 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:29,092 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 25 treesize of output 24 [2022-07-11 22:29:29,127 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:29,127 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 25 treesize of output 24 [2022-07-11 22:29:29,336 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 [2022-07-11 22:29:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:29,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:29,529 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 16 treesize of output 14 [2022-07-11 22:29:29,531 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 32 treesize of output 28 [2022-07-11 22:29:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:29:29,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827390649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:29,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:29,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 34 [2022-07-11 22:29:29,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67960874] [2022-07-11 22:29:29,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:29,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:29:29,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:29:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 22:29:29,609 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2022-07-11 22:29:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:30,344 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2022-07-11 22:29:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-11 22:29:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 76 [2022-07-11 22:29:30,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:30,345 INFO L225 Difference]: With dead ends: 127 [2022-07-11 22:29:30,346 INFO L226 Difference]: Without dead ends: 125 [2022-07-11 22:29:30,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-07-11 22:29:30,347 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 82 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:30,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 479 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 22:29:30,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-11 22:29:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2022-07-11 22:29:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:29:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-11 22:29:30,360 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2022-07-11 22:29:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:30,360 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-11 22:29:30,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2022-07-11 22:29:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-11 22:29:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-11 22:29:30,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:30,361 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:30,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:30,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-11 22:29:30,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:30,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:30,576 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 23 times [2022-07-11 22:29:30,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:30,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110544607] [2022-07-11 22:29:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:30,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110544607] [2022-07-11 22:29:30,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110544607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748198122] [2022-07-11 22:29:30,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:29:30,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:30,842 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:30,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-11 22:29:31,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-11 22:29:31,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:31,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-11 22:29:31,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:31,133 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 [2022-07-11 22:29:31,362 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 [2022-07-11 22:29:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:31,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:31,472 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 16 treesize of output 14 [2022-07-11 22:29:31,474 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 32 treesize of output 28 [2022-07-11 22:29:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:31,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748198122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:31,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:31,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-07-11 22:29:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860630641] [2022-07-11 22:29:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:31,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-11 22:29:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-11 22:29:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:29:31,551 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 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) [2022-07-11 22:29:32,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:32,448 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2022-07-11 22:29:32,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 22:29:32,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 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 76 [2022-07-11 22:29:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:32,448 INFO L225 Difference]: With dead ends: 144 [2022-07-11 22:29:32,448 INFO L226 Difference]: Without dead ends: 142 [2022-07-11 22:29:32,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-07-11 22:29:32,452 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:32,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 558 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 22:29:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-11 22:29:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2022-07-11 22:29:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 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) [2022-07-11 22:29:32,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-11 22:29:32,468 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 76 [2022-07-11 22:29:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:32,469 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-11 22:29:32,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 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) [2022-07-11 22:29:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-11 22:29:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-11 22:29:32,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:32,469 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:32,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-11 22:29:32,679 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 24 times [2022-07-11 22:29:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:32,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342138503] [2022-07-11 22:29:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:32,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:32,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342138503] [2022-07-11 22:29:32,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342138503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:32,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858493521] [2022-07-11 22:29:32,840 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:29:32,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:32,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:32,841 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:32,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-11 22:29:33,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-11 22:29:33,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 22:29:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:33,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:33,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858493521] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:33,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:33,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-07-11 22:29:33,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489728110] [2022-07-11 22:29:33,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:33,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 22:29:33,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:33,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 22:29:33,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-07-11 22:29:33,429 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 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) [2022-07-11 22:29:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:33,637 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-07-11 22:29:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 22:29:33,637 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 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 80 [2022-07-11 22:29:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:33,638 INFO L225 Difference]: With dead ends: 178 [2022-07-11 22:29:33,638 INFO L226 Difference]: Without dead ends: 131 [2022-07-11 22:29:33,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 22:29:33,639 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 177 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 125 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:29:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-11 22:29:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-07-11 22:29:33,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 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) [2022-07-11 22:29:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-11 22:29:33,655 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 80 [2022-07-11 22:29:33,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:33,655 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-11 22:29:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 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) [2022-07-11 22:29:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-11 22:29:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-11 22:29:33,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:33,656 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:33,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-11 22:29:33,856 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:33,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1640095734, now seen corresponding path program 25 times [2022-07-11 22:29:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:33,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899851433] [2022-07-11 22:29:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:34,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:34,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899851433] [2022-07-11 22:29:34,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899851433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:34,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106062615] [2022-07-11 22:29:34,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:29:34,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:34,180 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:34,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-11 22:29:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 22:29:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:34,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-11 22:29:34,380 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:29:34,380 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 [2022-07-11 22:29:34,390 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:34,390 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 25 treesize of output 24 [2022-07-11 22:29:34,423 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:29:34,424 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 25 treesize of output 24 [2022-07-11 22:29:34,648 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 [2022-07-11 22:29:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 3 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:34,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:34,869 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 16 treesize of output 14 [2022-07-11 22:29:34,870 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 32 treesize of output 28 [2022-07-11 22:29:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:29:34,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106062615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:34,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:34,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 37 [2022-07-11 22:29:34,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748340305] [2022-07-11 22:29:34,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:34,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 22:29:34,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:34,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 22:29:34,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 22:29:34,955 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 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) [2022-07-11 22:29:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:35,795 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-07-11 22:29:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-11 22:29:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 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 84 [2022-07-11 22:29:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:35,800 INFO L225 Difference]: With dead ends: 139 [2022-07-11 22:29:35,800 INFO L226 Difference]: Without dead ends: 137 [2022-07-11 22:29:35,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 147 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2022-07-11 22:29:35,802 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 94 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:35,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 578 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 22:29:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-11 22:29:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2022-07-11 22:29:35,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 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) [2022-07-11 22:29:35,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-11 22:29:35,823 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2022-07-11 22:29:35,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:35,823 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-11 22:29:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 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) [2022-07-11 22:29:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-11 22:29:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-11 22:29:35,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:35,824 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:35,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:36,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-11 22:29:36,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:36,025 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 26 times [2022-07-11 22:29:36,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:36,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483406627] [2022-07-11 22:29:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:36,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:36,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483406627] [2022-07-11 22:29:36,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483406627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:36,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665566003] [2022-07-11 22:29:36,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:29:36,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:36,404 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:36,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-11 22:29:36,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:29:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-11 22:29:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:36,590 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 15 treesize of output 11 [2022-07-11 22:29:37,171 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-11 22:29:37,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-11 22:29:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:37,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:29:37,511 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 16 treesize of output 14 [2022-07-11 22:29:37,512 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 32 treesize of output 28 [2022-07-11 22:29:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665566003] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:29:37,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:29:37,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-07-11 22:29:37,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108659509] [2022-07-11 22:29:37,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:29:37,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 22:29:37,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:29:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 22:29:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2022-07-11 22:29:37,588 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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) [2022-07-11 22:29:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:29:38,810 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-07-11 22:29:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-11 22:29:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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 84 [2022-07-11 22:29:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:29:38,811 INFO L225 Difference]: With dead ends: 139 [2022-07-11 22:29:38,811 INFO L226 Difference]: Without dead ends: 137 [2022-07-11 22:29:38,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 142 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=5310, Unknown=0, NotChecked=0, Total=5700 [2022-07-11 22:29:38,812 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:29:38,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 583 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1535 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-07-11 22:29:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-11 22:29:38,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2022-07-11 22:29:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 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) [2022-07-11 22:29:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-07-11 22:29:38,832 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 84 [2022-07-11 22:29:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:29:38,832 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-07-11 22:29:38,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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) [2022-07-11 22:29:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-07-11 22:29:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-11 22:29:38,833 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:29:38,833 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:29:38,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-11 22:29:39,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:39,037 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:29:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:29:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 463415552, now seen corresponding path program 27 times [2022-07-11 22:29:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:29:39,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166124161] [2022-07-11 22:29:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:29:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:29:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:29:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:39,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:29:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166124161] [2022-07-11 22:29:39,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166124161] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:29:39,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056909781] [2022-07-11 22:29:39,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:29:39,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:29:39,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:29:39,380 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:29:39,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-11 22:29:39,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-11 22:29:39,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:29:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-11 22:29:39,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:29:40,082 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 15 treesize of output 11 [2022-07-11 22:29:40,140 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:29:40,141 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 31 treesize of output 30 [2022-07-11 22:29:40,162 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-11 22:29:40,163 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 [2022-07-11 22:29:40,367 INFO L356 Elim1Store]: treesize reduction 74, result has 36.2 percent of original size [2022-07-11 22:29:40,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 61 [2022-07-11 22:29:41,626 INFO L356 Elim1Store]: treesize reduction 75, result has 25.0 percent of original size [2022-07-11 22:29:41,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 39 [2022-07-11 22:29:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 153 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:29:41,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:30:02,314 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 44 treesize of output 42 [2022-07-11 22:30:02,317 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 1070 treesize of output 1056 [2022-07-11 22:30:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 112 proven. 278 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:30:03,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056909781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:30:03,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:30:03,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29, 30] total 72 [2022-07-11 22:30:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021699235] [2022-07-11 22:30:03,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:30:03,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-11 22:30:03,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:30:03,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-11 22:30:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=4461, Unknown=21, NotChecked=0, Total=5112 [2022-07-11 22:30:03,224 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 72 states, 72 states have (on average 3.1527777777777777) internal successors, (227), 72 states have internal predecessors, (227), 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) [2022-07-11 22:30:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:30:40,310 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2022-07-11 22:30:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-11 22:30:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.1527777777777777) internal successors, (227), 72 states have internal predecessors, (227), 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 88 [2022-07-11 22:30:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:30:40,311 INFO L225 Difference]: With dead ends: 230 [2022-07-11 22:30:40,311 INFO L226 Difference]: Without dead ends: 97 [2022-07-11 22:30:40,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3723 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=1706, Invalid=15278, Unknown=46, NotChecked=0, Total=17030 [2022-07-11 22:30:40,312 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:30:40,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 823 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 440 Invalid, 0 Unknown, 316 Unchecked, 0.2s Time] [2022-07-11 22:30:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-11 22:30:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-07-11 22:30:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 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) [2022-07-11 22:30:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-07-11 22:30:40,331 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 88 [2022-07-11 22:30:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:30:40,331 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-07-11 22:30:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.1527777777777777) internal successors, (227), 72 states have internal predecessors, (227), 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) [2022-07-11 22:30:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-07-11 22:30:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-11 22:30:40,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:30:40,332 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:30:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-11 22:30:40,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:30:40,547 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:30:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:30:40,548 INFO L85 PathProgramCache]: Analyzing trace with hash 134830326, now seen corresponding path program 28 times [2022-07-11 22:30:40,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:30:40,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233328575] [2022-07-11 22:30:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:30:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:30:40,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:30:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 4 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:30:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:30:40,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233328575] [2022-07-11 22:30:40,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233328575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:30:40,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031806758] [2022-07-11 22:30:40,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:30:40,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:30:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:30:40,972 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:30:40,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-11 22:30:41,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:30:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:30:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-11 22:30:41,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:30:41,157 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 15 treesize of output 11 [2022-07-11 22:30:41,240 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-07-11 22:30:41,240 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 28 treesize of output 27 [2022-07-11 22:30:41,254 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 22:30:41,255 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 27 treesize of output 26 [2022-07-11 22:30:41,305 INFO L356 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2022-07-11 22:30:41,305 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 28 treesize of output 27 [2022-07-11 22:30:41,318 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 22:30:41,318 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 27 treesize of output 26 [2022-07-11 22:30:41,388 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-11 22:30:41,389 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 27 treesize of output 26 [2022-07-11 22:30:41,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-11 22:30:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 10 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:30:41,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:30:44,369 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (forall ((v_ArrVal_1666 Int)) (<= 9 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-07-11 22:30:50,367 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_711| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (<= 9 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_711|)))) is different from false [2022-07-11 22:30:52,381 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1660 Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int) (|v_ULTIMATE.start_main_~i~0#1_711| Int)) (or (<= 9 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1660) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_711|)))) is different from false [2022-07-11 22:30:54,398 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1660 Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int) (|v_ULTIMATE.start_main_~i~0#1_711| Int) (v_ArrVal_1658 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (<= 9 (select (store (store (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1658) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1660)) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_711|)))) is different from false [2022-07-11 22:30:56,419 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_712| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_712|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1660 Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int) (|v_ULTIMATE.start_main_~i~0#1_711| Int) (v_ArrVal_1658 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_712| 1) |v_ULTIMATE.start_main_~i~0#1_711|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (<= 9 (select (store (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_712| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1658) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1660)) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-07-11 22:30:56,433 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 45 treesize of output 43 [2022-07-11 22:30:56,438 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 3202 treesize of output 3186 [2022-07-11 22:30:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 0 trivial. 70 not checked. [2022-07-11 22:30:57,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031806758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:30:57,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:30:57,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 31] total 61 [2022-07-11 22:30:57,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784430513] [2022-07-11 22:30:57,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:30:57,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-11 22:30:57,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:30:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-11 22:30:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2848, Unknown=14, NotChecked=560, Total=3660 [2022-07-11 22:30:57,271 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 61 states, 61 states have (on average 3.3278688524590163) internal successors, (203), 61 states have internal predecessors, (203), 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) [2022-07-11 22:30:59,752 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= 9 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (forall ((|v_ULTIMATE.start_main_~i~0#1_712| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_712|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1660 Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int) (|v_ULTIMATE.start_main_~i~0#1_711| Int) (v_ArrVal_1658 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_712| 1) |v_ULTIMATE.start_main_~i~0#1_711|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (<= 9 (select (store (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_712| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1658) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1660)) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) (= (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse0))) is different from false [2022-07-11 22:31:01,822 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (forall ((v_ArrVal_1666 Int)) (<= 9 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (= (select .cse0 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)) 9) (<= 10 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_711| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int) (v_ArrVal_1663 Int) (v_ArrVal_1666 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_711| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (<= 9 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_711| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1663) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_711|)))))) is different from false [2022-07-11 22:31:03,852 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= 11 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_710| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_710|)) (forall ((v_ArrVal_1666 Int)) (<= 9 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_710| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1666) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (= (select .cse0 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)) 9))) is different from false [2022-07-11 22:31:04,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:31:04,719 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2022-07-11 22:31:04,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-11 22:31:04,720 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.3278688524590163) internal successors, (203), 61 states have internal predecessors, (203), 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 96 [2022-07-11 22:31:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:31:04,720 INFO L225 Difference]: With dead ends: 106 [2022-07-11 22:31:04,720 INFO L226 Difference]: Without dead ends: 104 [2022-07-11 22:31:04,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 159 SyntacticMatches, 19 SemanticMatches, 91 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 2076 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=521, Invalid=6634, Unknown=17, NotChecked=1384, Total=8556 [2022-07-11 22:31:04,721 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:31:04,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 644 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1654 Invalid, 0 Unknown, 790 Unchecked, 0.5s Time] [2022-07-11 22:31:04,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-11 22:31:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2022-07-11 22:31:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 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) [2022-07-11 22:31:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-11 22:31:04,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 96 [2022-07-11 22:31:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:31:04,740 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-11 22:31:04,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.3278688524590163) internal successors, (203), 61 states have internal predecessors, (203), 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) [2022-07-11 22:31:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-11 22:31:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-11 22:31:04,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:31:04,741 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:31:04,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-11 22:31:04,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-11 22:31:04,945 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:31:04,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:31:04,946 INFO L85 PathProgramCache]: Analyzing trace with hash -905180180, now seen corresponding path program 29 times [2022-07-11 22:31:04,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:31:04,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442949156] [2022-07-11 22:31:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:31:04,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:31:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:31:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442949156] [2022-07-11 22:31:05,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442949156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:31:05,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350643901] [2022-07-11 22:31:05,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:31:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:05,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:31:05,366 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:31:05,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-11 22:31:05,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-11 22:31:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:31:05,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-11 22:31:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:31:05,823 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 15 treesize of output 11 [2022-07-11 22:31:05,850 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:31:05,851 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 [2022-07-11 22:31:05,859 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:31:05,860 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 25 treesize of output 24 [2022-07-11 22:31:05,897 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:31:05,897 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 25 treesize of output 24 [2022-07-11 22:31:06,213 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 [2022-07-11 22:31:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 3 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:31:06,458 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 16 treesize of output 14 [2022-07-11 22:31:06,460 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 32 treesize of output 28 [2022-07-11 22:31:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 524 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:31:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350643901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:31:06,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:31:06,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 42 [2022-07-11 22:31:06,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382769642] [2022-07-11 22:31:06,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:31:06,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-11 22:31:06,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:31:06,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-11 22:31:06,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 22:31:06,564 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-07-11 22:31:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:31:07,802 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-07-11 22:31:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 22:31:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 100 [2022-07-11 22:31:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:31:07,803 INFO L225 Difference]: With dead ends: 117 [2022-07-11 22:31:07,803 INFO L226 Difference]: Without dead ends: 115 [2022-07-11 22:31:07,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 177 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=4378, Unknown=0, NotChecked=0, Total=4692 [2022-07-11 22:31:07,804 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 80 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:31:07,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 810 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 22:31:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-11 22:31:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-07-11 22:31:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 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) [2022-07-11 22:31:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-11 22:31:07,824 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2022-07-11 22:31:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:31:07,825 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-11 22:31:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-07-11 22:31:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-11 22:31:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-11 22:31:07,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:31:07,825 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:31:07,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-11 22:31:08,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:08,044 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:31:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:31:08,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1796189214, now seen corresponding path program 30 times [2022-07-11 22:31:08,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:31:08,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238594775] [2022-07-11 22:31:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:31:08,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:31:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:31:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238594775] [2022-07-11 22:31:08,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238594775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:31:08,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923488765] [2022-07-11 22:31:08,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:31:08,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:08,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:31:08,488 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:31:08,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-11 22:31:09,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-11 22:31:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:31:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-11 22:31:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:31:09,551 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 15 treesize of output 11 [2022-07-11 22:31:09,611 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:31:09,612 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 25 treesize of output 24 [2022-07-11 22:31:09,977 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 [2022-07-11 22:31:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:31:10,161 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 16 treesize of output 14 [2022-07-11 22:31:10,163 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 32 treesize of output 28 [2022-07-11 22:31:10,284 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:10,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923488765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:31:10,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:31:10,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 30] total 45 [2022-07-11 22:31:10,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274932021] [2022-07-11 22:31:10,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:31:10,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-11 22:31:10,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:31:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-11 22:31:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2022-07-11 22:31:10,285 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 45 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 45 states have internal predecessors, (160), 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) [2022-07-11 22:31:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:31:11,518 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2022-07-11 22:31:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-11 22:31:11,518 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 45 states have internal predecessors, (160), 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 104 [2022-07-11 22:31:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:31:11,519 INFO L225 Difference]: With dead ends: 116 [2022-07-11 22:31:11,519 INFO L226 Difference]: Without dead ends: 114 [2022-07-11 22:31:11,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 185 SyntacticMatches, 8 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=4793, Unknown=0, NotChecked=0, Total=5112 [2022-07-11 22:31:11,520 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 81 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 2518 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:31:11,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 787 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 22:31:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-11 22:31:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2022-07-11 22:31:11,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 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) [2022-07-11 22:31:11,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-11 22:31:11,541 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-07-11 22:31:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:31:11,541 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-11 22:31:11,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.5555555555555554) internal successors, (160), 45 states have internal predecessors, (160), 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) [2022-07-11 22:31:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-11 22:31:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-11 22:31:11,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:31:11,543 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:31:11,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-11 22:31:11,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:11,755 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:31:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:31:11,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 31 times [2022-07-11 22:31:11,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:31:11,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200344881] [2022-07-11 22:31:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:31:11,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:31:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:12,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:31:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200344881] [2022-07-11 22:31:12,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200344881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:31:12,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408192875] [2022-07-11 22:31:12,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:31:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:31:12,312 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:31:12,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-11 22:31:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:12,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-11 22:31:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:31:12,695 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 [2022-07-11 22:31:13,145 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 [2022-07-11 22:31:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:13,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:31:13,588 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 16 treesize of output 14 [2022-07-11 22:31:13,590 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 32 treesize of output 28 [2022-07-11 22:31:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:13,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408192875] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:31:13,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:31:13,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2022-07-11 22:31:13,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176496734] [2022-07-11 22:31:13,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:31:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-11 22:31:13,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:31:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-11 22:31:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4699, Unknown=0, NotChecked=0, Total=4970 [2022-07-11 22:31:13,752 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 71 states, 71 states have (on average 3.704225352112676) internal successors, (263), 71 states have internal predecessors, (263), 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) [2022-07-11 22:31:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:31:15,986 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2022-07-11 22:31:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-11 22:31:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.704225352112676) internal successors, (263), 71 states have internal predecessors, (263), 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 108 [2022-07-11 22:31:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:31:15,988 INFO L225 Difference]: With dead ends: 192 [2022-07-11 22:31:15,988 INFO L226 Difference]: Without dead ends: 190 [2022-07-11 22:31:15,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 167 SyntacticMatches, 9 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4197 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=574, Invalid=12082, Unknown=0, NotChecked=0, Total=12656 [2022-07-11 22:31:15,989 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 142 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:31:15,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1356 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-11 22:31:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-11 22:31:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 125. [2022-07-11 22:31:16,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 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) [2022-07-11 22:31:16,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-07-11 22:31:16,014 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 108 [2022-07-11 22:31:16,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:31:16,015 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-07-11 22:31:16,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.704225352112676) internal successors, (263), 71 states have internal predecessors, (263), 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) [2022-07-11 22:31:16,015 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-07-11 22:31:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-11 22:31:16,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:31:16,017 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:31:16,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-11 22:31:16,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-11 22:31:16,228 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:31:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:31:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 32 times [2022-07-11 22:31:16,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:31:16,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675220807] [2022-07-11 22:31:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:31:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:31:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:16,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:31:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675220807] [2022-07-11 22:31:16,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675220807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:31:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418138493] [2022-07-11 22:31:16,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:31:16,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:16,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:31:16,486 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:31:16,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-11 22:31:16,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:31:16,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:31:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 22:31:16,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:31:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:31:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:17,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418138493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:31:17,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:31:17,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-07-11 22:31:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602635122] [2022-07-11 22:31:17,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:31:17,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-11 22:31:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:31:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-11 22:31:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2022-07-11 22:31:17,142 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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) [2022-07-11 22:31:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:31:17,477 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-07-11 22:31:17,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-11 22:31:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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 112 [2022-07-11 22:31:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:31:17,478 INFO L225 Difference]: With dead ends: 242 [2022-07-11 22:31:17,478 INFO L226 Difference]: Without dead ends: 179 [2022-07-11 22:31:17,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-07-11 22:31:17,479 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 231 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:31:17,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 269 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:31:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-11 22:31:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2022-07-11 22:31:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 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) [2022-07-11 22:31:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-07-11 22:31:17,504 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 112 [2022-07-11 22:31:17,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:31:17,504 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-07-11 22:31:17,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 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) [2022-07-11 22:31:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-07-11 22:31:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-11 22:31:17,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:31:17,505 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:31:17,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-11 22:31:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-11 22:31:17,722 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:31:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:31:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash 123488718, now seen corresponding path program 33 times [2022-07-11 22:31:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:31:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719606403] [2022-07-11 22:31:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:31:17,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:31:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:31:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:18,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:31:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719606403] [2022-07-11 22:31:18,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719606403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:31:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494088036] [2022-07-11 22:31:18,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:31:18,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:31:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:31:18,339 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:31:18,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-11 22:31:19,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-11 22:31:19,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:31:19,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-11 22:31:19,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:31:20,164 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 15 treesize of output 11 [2022-07-11 22:31:20,230 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:31:20,230 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 [2022-07-11 22:31:20,240 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:31:20,240 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 25 treesize of output 24 [2022-07-11 22:31:20,282 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:31:20,282 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 25 treesize of output 24 [2022-07-11 22:31:20,771 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 [2022-07-11 22:31:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 3 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:31:20,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:31:23,319 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_963| Int)) (or (forall ((v_ArrVal_2224 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_963| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2224) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_963|)))) is different from false [2022-07-11 22:31:57,075 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_964| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_963| Int) (v_ArrVal_2222 Int) (v_ArrVal_2224 Int) (v_ArrVal_2219 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_964| 1) |v_ULTIMATE.start_main_~i~0#1_963|)) (<= 12 (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_964| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_2219) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2222)) (+ (* |v_ULTIMATE.start_main_~i~0#1_963| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2224) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_964|)))) is different from false [2022-07-11 22:31:57,081 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 38 treesize of output 36 [2022-07-11 22:31:57,084 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 3246 treesize of output 3214 [2022-07-11 22:31:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 667 refuted. 29 times theorem prover too weak. 0 trivial. 27 not checked. [2022-07-11 22:31:58,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494088036] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:31:58,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:31:58,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 35] total 81 [2022-07-11 22:31:58,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570831900] [2022-07-11 22:31:58,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:31:58,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-11 22:31:58,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:31:58,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-11 22:31:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5743, Unknown=73, NotChecked=310, Total=6480 [2022-07-11 22:31:58,728 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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) [2022-07-11 22:32:01,564 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 48) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 12) (forall ((|v_ULTIMATE.start_main_~i~0#1_964| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_963| Int) (v_ArrVal_2222 Int) (v_ArrVal_2224 Int) (v_ArrVal_2219 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_964| 1) |v_ULTIMATE.start_main_~i~0#1_963|)) (<= 12 (select (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_964| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_2219) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2222)) (+ (* |v_ULTIMATE.start_main_~i~0#1_963| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2224) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_964|)))))) is different from false [2022-07-11 22:32:03,621 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 12 (select .cse0 48)) (forall ((|v_ULTIMATE.start_main_~i~0#1_963| Int)) (or (forall ((v_ArrVal_2224 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_963| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2224) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_963|)))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ (div (+ 48 (* (- 1) |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) 1) |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-07-11 22:32:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:32:04,560 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2022-07-11 22:32:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-11 22:32:04,560 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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 116 [2022-07-11 22:32:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:32:04,561 INFO L225 Difference]: With dead ends: 185 [2022-07-11 22:32:04,561 INFO L226 Difference]: Without dead ends: 183 [2022-07-11 22:32:04,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=635, Invalid=11078, Unknown=75, NotChecked=868, Total=12656 [2022-07-11 22:32:04,562 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 197 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 3168 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 3168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:32:04,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1214 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 3168 Invalid, 0 Unknown, 279 Unchecked, 1.0s Time] [2022-07-11 22:32:04,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-07-11 22:32:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 117. [2022-07-11 22:32:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 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) [2022-07-11 22:32:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-11 22:32:04,587 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2022-07-11 22:32:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:32:04,587 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-11 22:32:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 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) [2022-07-11 22:32:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-11 22:32:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-11 22:32:04,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:32:04,588 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:32:04,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-11 22:32:04,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-11 22:32:04,807 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:32:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:32:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 34 times [2022-07-11 22:32:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:32:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830664706] [2022-07-11 22:32:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:32:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:32:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:32:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:32:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830664706] [2022-07-11 22:32:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830664706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:32:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062082882] [2022-07-11 22:32:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:32:05,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:32:05,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:32:05,293 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:32:05,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-11 22:32:05,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:32:05,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:32:05,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-11 22:32:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:32:05,550 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 [2022-07-11 22:32:06,013 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 [2022-07-11 22:32:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:06,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:32:06,166 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 16 treesize of output 14 [2022-07-11 22:32:06,167 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 32 treesize of output 28 [2022-07-11 22:32:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:06,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062082882] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:32:06,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:32:06,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 48 [2022-07-11 22:32:06,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133149630] [2022-07-11 22:32:06,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:32:06,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 22:32:06,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:32:06,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 22:32:06,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2116, Unknown=0, NotChecked=0, Total=2256 [2022-07-11 22:32:06,284 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 48 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 48 states have internal predecessors, (175), 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) [2022-07-11 22:32:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:32:08,292 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2022-07-11 22:32:08,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-11 22:32:08,293 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 48 states have internal predecessors, (175), 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 116 [2022-07-11 22:32:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:32:08,293 INFO L225 Difference]: With dead ends: 204 [2022-07-11 22:32:08,293 INFO L226 Difference]: Without dead ends: 202 [2022-07-11 22:32:08,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=8152, Unknown=0, NotChecked=0, Total=8556 [2022-07-11 22:32:08,294 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 131 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3441 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:32:08,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1139 Invalid, 3597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3441 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 22:32:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-11 22:32:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 133. [2022-07-11 22:32:08,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 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) [2022-07-11 22:32:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-07-11 22:32:08,328 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 116 [2022-07-11 22:32:08,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:32:08,328 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-07-11 22:32:08,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6458333333333335) internal successors, (175), 48 states have internal predecessors, (175), 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) [2022-07-11 22:32:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-07-11 22:32:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 22:32:08,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:32:08,329 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:32:08,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-11 22:32:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:32:08,543 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:32:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:32:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 35 times [2022-07-11 22:32:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:32:08,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690398626] [2022-07-11 22:32:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:32:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:32:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:32:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:32:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690398626] [2022-07-11 22:32:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690398626] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:32:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741969512] [2022-07-11 22:32:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:32:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:32:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:32:08,836 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:32:08,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-11 22:32:09,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-11 22:32:09,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:32:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-11 22:32:09,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:32:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:32:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:09,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741969512] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:32:09,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:32:09,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2022-07-11 22:32:09,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372693611] [2022-07-11 22:32:09,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:32:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 22:32:09,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:32:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 22:32:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 22:32:09,972 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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) [2022-07-11 22:32:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:32:10,329 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2022-07-11 22:32:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-11 22:32:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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 120 [2022-07-11 22:32:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:32:10,330 INFO L225 Difference]: With dead ends: 258 [2022-07-11 22:32:10,330 INFO L226 Difference]: Without dead ends: 191 [2022-07-11 22:32:10,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2022-07-11 22:32:10,332 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 306 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:32:10,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 189 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:32:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-11 22:32:10,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2022-07-11 22:32:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 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) [2022-07-11 22:32:10,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-07-11 22:32:10,368 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 120 [2022-07-11 22:32:10,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:32:10,368 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-07-11 22:32:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 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) [2022-07-11 22:32:10,369 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-07-11 22:32:10,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-11 22:32:10,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:32:10,369 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:32:10,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-11 22:32:10,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-11 22:32:10,571 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:32:10,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:32:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash -816765057, now seen corresponding path program 36 times [2022-07-11 22:32:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:32:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786449458] [2022-07-11 22:32:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:32:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:32:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:32:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:11,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:32:11,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786449458] [2022-07-11 22:32:11,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786449458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:32:11,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497231107] [2022-07-11 22:32:11,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:32:11,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:32:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:32:11,126 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:32:11,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-11 22:32:13,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-11 22:32:13,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:32:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-11 22:32:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:32:13,733 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 15 treesize of output 11 [2022-07-11 22:32:13,776 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:32:13,776 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 [2022-07-11 22:32:13,786 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:32:13,786 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 25 treesize of output 24 [2022-07-11 22:32:13,834 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-11 22:32:13,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-11 22:32:14,307 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 [2022-07-11 22:32:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 3 proven. 831 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:32:14,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:32:14,611 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 16 treesize of output 14 [2022-07-11 22:32:14,612 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 32 treesize of output 28 [2022-07-11 22:32:14,733 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 22:32:14,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497231107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:32:14,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:32:14,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 52 [2022-07-11 22:32:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999443005] [2022-07-11 22:32:14,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:32:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-11 22:32:14,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:32:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-11 22:32:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 22:32:14,735 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 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)