./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnifrev.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/rewnifrev.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 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:14:18,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:14:18,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:14:18,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:14:18,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:14:18,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:14:18,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:14:18,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:14:18,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:14:18,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:14:18,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:14:18,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:14:18,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:14:18,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:14:18,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:14:18,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:14:18,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:14:18,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:14:18,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:14:18,645 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:14:18,646 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:14:18,647 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:14:18,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:14:18,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:14:18,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:14:18,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:14:18,656 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:14:18,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:14:18,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:14:18,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:14:18,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:14:18,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:14:18,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:14:18,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:14:18,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:14:18,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:14:18,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:14:18,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:14:18,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:14:18,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:14:18,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:14:18,667 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:14:18,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:14:18,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:14:18,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:14:18,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:14:18,700 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:14:18,701 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:14:18,701 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:14:18,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:14:18,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:14:18,701 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:14:18,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:14:18,702 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:14:18,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:14:18,703 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:14:18,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:14:18,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:14:18,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:14:18,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:14:18,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:14:18,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:14:18,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:14:18,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:14:18,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:14:18,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:14:18,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:14:18,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:14:18,706 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:14:18,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:14:18,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:14:18,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62ffb246c1e6cc2a3d3d5a08bb5a65a9894a173aba5be4caac9150f1d27ccfed [2022-07-20 21:14:18,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:14:18,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:14:18,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:14:18,945 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:14:18,945 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:14:18,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev.c [2022-07-20 21:14:18,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b64d27cc/0204271b706f4a128bad2f1d2e9a9144/FLAG6c53416a9 [2022-07-20 21:14:19,398 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:14:19,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev.c [2022-07-20 21:14:19,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b64d27cc/0204271b706f4a128bad2f1d2e9a9144/FLAG6c53416a9 [2022-07-20 21:14:19,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b64d27cc/0204271b706f4a128bad2f1d2e9a9144 [2022-07-20 21:14:19,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:14:19,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:14:19,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:14:19,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:14:19,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:14:19,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce2e5f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19, skipping insertion in model container [2022-07-20 21:14:19,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:14:19,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:14:19,563 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/rewnifrev.c[400,413] [2022-07-20 21:14:19,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:14:19,582 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:14:19,590 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/rewnifrev.c[400,413] [2022-07-20 21:14:19,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:14:19,608 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:14:19,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19 WrapperNode [2022-07-20 21:14:19,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:14:19,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:14:19,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:14:19,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:14:19,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,631 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-20 21:14:19,631 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:14:19,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:14:19,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:14:19,632 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:14:19,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,646 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:14:19,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:14:19,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:14:19,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:14:19,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (1/1) ... [2022-07-20 21:14:19,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:14:19,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:19,684 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) [2022-07-20 21:14:19,714 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 [2022-07-20 21:14:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:14:19,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:14:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:14:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:14:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:14:19,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:14:19,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:14:19,777 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:14:19,779 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:14:19,871 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:14:19,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:14:19,891 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:14:19,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:14:19 BoogieIcfgContainer [2022-07-20 21:14:19,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:14:19,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:14:19,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:14:19,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:14:19,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:14:19" (1/3) ... [2022-07-20 21:14:19,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d485002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:14:19, skipping insertion in model container [2022-07-20 21:14:19,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:19" (2/3) ... [2022-07-20 21:14:19,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d485002 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:14:19, skipping insertion in model container [2022-07-20 21:14:19,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:14:19" (3/3) ... [2022-07-20 21:14:19,897 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev.c [2022-07-20 21:14:19,920 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:14:19,920 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:14:19,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:14:19,983 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@66a4eeca, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1676d59e [2022-07-20 21:14:19,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:14:19,986 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) [2022-07-20 21:14:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 21:14:19,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:19,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:19,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-20 21:14:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:20,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62154867] [2022-07-20 21:14:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:20,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:20,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62154867] [2022-07-20 21:14:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62154867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:20,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:20,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:14:20,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859307254] [2022-07-20 21:14:20,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:20,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:14:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:14:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:14:20,163 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) [2022-07-20 21:14:20,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:20,174 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-20 21:14:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:14:20,177 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 [2022-07-20 21:14:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:20,182 INFO L225 Difference]: With dead ends: 29 [2022-07-20 21:14:20,182 INFO L226 Difference]: Without dead ends: 14 [2022-07-20 21:14:20,184 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 [2022-07-20 21:14:20,188 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 [2022-07-20 21:14:20,188 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] [2022-07-20 21:14:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-20 21:14:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-20 21:14:20,212 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) [2022-07-20 21:14:20,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-20 21:14:20,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-20 21:14:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:20,214 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-20 21:14:20,215 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) [2022-07-20 21:14:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-20 21:14:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 21:14:20,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:20,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:20,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:14:20,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:20,218 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-20 21:14:20,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:20,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603862208] [2022-07-20 21:14:20,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:20,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:20,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603862208] [2022-07-20 21:14:20,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603862208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:20,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:20,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:14:20,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665704109] [2022-07-20 21:14:20,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:20,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:14:20,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:20,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:14:20,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:14:20,288 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) [2022-07-20 21:14:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:20,307 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-20 21:14:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:14:20,308 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 [2022-07-20 21:14:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:20,308 INFO L225 Difference]: With dead ends: 29 [2022-07-20 21:14:20,308 INFO L226 Difference]: Without dead ends: 18 [2022-07-20 21:14:20,309 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 [2022-07-20 21:14:20,309 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:20,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 17 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:20,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-20 21:14:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-20 21:14:20,312 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) [2022-07-20 21:14:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-20 21:14:20,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-20 21:14:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:20,313 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-20 21:14:20,313 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) [2022-07-20 21:14:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-20 21:14:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 21:14:20,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:20,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:14:20,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-20 21:14:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:20,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310635620] [2022-07-20 21:14:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:20,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:20,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310635620] [2022-07-20 21:14:20,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310635620] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:20,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:20,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 21:14:20,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783456782] [2022-07-20 21:14:20,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:20,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 21:14:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:20,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 21:14:20,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:14:20,373 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-20 21:14:20,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:20,421 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-07-20 21:14:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 21:14:20,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 [2022-07-20 21:14:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:20,422 INFO L225 Difference]: With dead ends: 32 [2022-07-20 21:14:20,422 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:14:20,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 21:14:20,423 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:20,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:14:20,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-07-20 21:14:20,429 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) [2022-07-20 21:14:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-20 21:14:20,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-20 21:14:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:20,429 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-20 21:14:20,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2022-07-20 21:14:20,431 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-20 21:14:20,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 21:14:20,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:20,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:20,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 21:14:20,433 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:20,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:20,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-20 21:14:20,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:20,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954897179] [2022-07-20 21:14:20,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 21:14:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:20,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954897179] [2022-07-20 21:14:20,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954897179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:20,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:20,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 21:14:20,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549013970] [2022-07-20 21:14:20,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:20,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 21:14:20,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 21:14:20,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-20 21:14:20,615 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-07-20 21:14:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:20,722 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-07-20 21:14:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:14:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) Word has length 16 [2022-07-20 21:14:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:20,727 INFO L225 Difference]: With dead ends: 27 [2022-07-20 21:14:20,727 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 21:14:20,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:14:20,734 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:20,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 21:14:20,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-07-20 21:14:20,740 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) [2022-07-20 21:14:20,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-20 21:14:20,740 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-20 21:14:20,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:20,741 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-20 21:14:20,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 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) [2022-07-20 21:14:20,741 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-20 21:14:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:14:20,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:20,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 21:14:20,742 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-20 21:14:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:20,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365899087] [2022-07-20 21:14:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365899087] [2022-07-20 21:14:20,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365899087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:20,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371038673] [2022-07-20 21:14:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:20,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:20,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:20,882 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) [2022-07-20 21:14:20,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:14:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:20,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 21:14:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:20,966 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 [2022-07-20 21:14:21,139 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:14:21,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:14:21,220 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 21:14:21,221 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 [2022-07-20 21:14:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:21,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:29,443 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 [2022-07-20 21:14:29,448 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 82 treesize of output 78 [2022-07-20 21:14:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:29,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371038673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:29,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:29,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 21 [2022-07-20 21:14:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564182044] [2022-07-20 21:14:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:14:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:29,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:14:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=322, Unknown=3, NotChecked=0, Total=420 [2022-07-20 21:14:29,481 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2022-07-20 21:14:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:29,678 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-07-20 21:14:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:14:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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 [2022-07-20 21:14:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:29,679 INFO L225 Difference]: With dead ends: 32 [2022-07-20 21:14:29,679 INFO L226 Difference]: Without dead ends: 30 [2022-07-20 21:14:29,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=196, Invalid=613, Unknown=3, NotChecked=0, Total=812 [2022-07-20 21:14:29,680 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:29,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 55 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 67 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-20 21:14:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-20 21:14:29,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-07-20 21:14:29,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 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) [2022-07-20 21:14:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-07-20 21:14:29,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-07-20 21:14:29,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:29,695 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-07-20 21:14:29,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2022-07-20 21:14:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-07-20 21:14:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 21:14:29,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:29,696 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:29,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:29,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:29,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-07-20 21:14:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:29,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18903509] [2022-07-20 21:14:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:29,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:29,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:29,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18903509] [2022-07-20 21:14:29,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18903509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455101326] [2022-07-20 21:14:29,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:14:29,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:29,966 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) [2022-07-20 21:14:29,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:14:30,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:14:30,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:14:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:30,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:30,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455101326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:30,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:30,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 12 [2022-07-20 21:14:30,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783889258] [2022-07-20 21:14:30,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:30,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 21:14:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:30,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 21:14:30,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2022-07-20 21:14:30,164 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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) [2022-07-20 21:14:30,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:30,239 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-07-20 21:14:30,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 21:14:30,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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) Word has length 24 [2022-07-20 21:14:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:30,240 INFO L225 Difference]: With dead ends: 56 [2022-07-20 21:14:30,240 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 21:14:30,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:14:30,241 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:30,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 38 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:30,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 21:14:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-20 21:14:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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) [2022-07-20 21:14:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-20 21:14:30,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2022-07-20 21:14:30,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:30,245 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-20 21:14:30,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 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) [2022-07-20 21:14:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-20 21:14:30,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:14:30,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:30,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:30,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:30,462 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,SelfDestructingSolverStorable5 [2022-07-20 21:14:30,463 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:30,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 3 times [2022-07-20 21:14:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:30,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267827825] [2022-07-20 21:14:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:30,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:30,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267827825] [2022-07-20 21:14:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267827825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:30,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190303060] [2022-07-20 21:14:30,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:14:30,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:30,830 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) [2022-07-20 21:14:30,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:14:30,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 21:14:30,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:14:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:30,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-20 21:14:30,935 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:30,936 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 [2022-07-20 21:14:30,950 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:30,951 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 [2022-07-20 21:14:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:31,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:14:31,183 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 [2022-07-20 21:14:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:31,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:31,409 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 24 treesize of output 22 [2022-07-20 21:14:31,412 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 192 treesize of output 184 [2022-07-20 21:14:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:31,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190303060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:31,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:31,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-07-20 21:14:31,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142540684] [2022-07-20 21:14:31,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:31,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 21:14:31,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:31,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 21:14:31,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:14:31,443 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 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) [2022-07-20 21:14:31,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:31,987 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-07-20 21:14:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-20 21:14:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 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 [2022-07-20 21:14:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:31,988 INFO L225 Difference]: With dead ends: 42 [2022-07-20 21:14:31,988 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 21:14:31,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=2004, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 21:14:31,989 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:31,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 172 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-07-20 21:14:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 21:14:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-07-20 21:14:31,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2022-07-20 21:14:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-20 21:14:31,994 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2022-07-20 21:14:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:31,994 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-20 21:14:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 31 states have internal predecessors, (74), 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) [2022-07-20 21:14:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-20 21:14:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 21:14:31,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:31,995 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:32,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:32,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:32,196 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:32,197 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 4 times [2022-07-20 21:14:32,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:32,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538096501] [2022-07-20 21:14:32,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:32,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:32,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:32,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538096501] [2022-07-20 21:14:32,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538096501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763263960] [2022-07-20 21:14:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:14:32,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:32,250 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) [2022-07-20 21:14:32,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:14:32,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:14:32,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:32,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:14:32,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:32,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:32,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763263960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:32,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:32,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 15 [2022-07-20 21:14:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367354406] [2022-07-20 21:14:32,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:32,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 21:14:32,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 21:14:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2022-07-20 21:14:32,440 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2022-07-20 21:14:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:32,520 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-07-20 21:14:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 21:14:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) Word has length 32 [2022-07-20 21:14:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:32,521 INFO L225 Difference]: With dead ends: 68 [2022-07-20 21:14:32,521 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 21:14:32,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:14:32,522 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:32,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 21:14:32,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-07-20 21:14:32,525 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) [2022-07-20 21:14:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-20 21:14:32,526 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-07-20 21:14:32,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:32,526 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-20 21:14:32,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 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) [2022-07-20 21:14:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-20 21:14:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 21:14:32,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:32,527 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:32,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:32,739 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 5 times [2022-07-20 21:14:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7171160] [2022-07-20 21:14:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:33,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7171160] [2022-07-20 21:14:33,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7171160] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:33,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927419241] [2022-07-20 21:14:33,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:14:33,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:33,120 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) [2022-07-20 21:14:33,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:14:33,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 21:14:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 21:14:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:33,202 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 [2022-07-20 21:14:33,237 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:33,238 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 [2022-07-20 21:14:33,251 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:33,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:14:33,283 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:33,283 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 [2022-07-20 21:14:33,295 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:33,296 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 [2022-07-20 21:14:33,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:33,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:14:33,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 21:14:33,468 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 21:14:33,469 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 17 treesize of output 10 [2022-07-20 21:14:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:33,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:33,796 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 24 treesize of output 22 [2022-07-20 21:14:33,799 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 192 treesize of output 184 [2022-07-20 21:14:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:33,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927419241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:33,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:33,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-07-20 21:14:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106971342] [2022-07-20 21:14:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:33,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 21:14:33,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 21:14:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:14:33,828 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2022-07-20 21:14:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:34,178 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-07-20 21:14:34,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:14:34,179 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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 [2022-07-20 21:14:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:34,179 INFO L225 Difference]: With dead ends: 49 [2022-07-20 21:14:34,179 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 21:14:34,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=516, Invalid=1740, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 21:14:34,181 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:34,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 102 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-07-20 21:14:34,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 21:14:34,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-20 21:14:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 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) [2022-07-20 21:14:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-20 21:14:34,185 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2022-07-20 21:14:34,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:34,185 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-20 21:14:34,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 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) [2022-07-20 21:14:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-20 21:14:34,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:14:34,186 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:34,186 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:34,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:14:34,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:34,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:34,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:34,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 6 times [2022-07-20 21:14:34,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:34,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797849570] [2022-07-20 21:14:34,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:34,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:34,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:34,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797849570] [2022-07-20 21:14:34,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797849570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:34,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129208191] [2022-07-20 21:14:34,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:14:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:34,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:34,456 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) [2022-07-20 21:14:34,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:14:34,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 21:14:34,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 21:14:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:34,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:34,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129208191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:34,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:34,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 18 [2022-07-20 21:14:34,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978655808] [2022-07-20 21:14:34,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:34,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:14:34,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:34,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:14:34,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2022-07-20 21:14:34,674 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 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) [2022-07-20 21:14:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:34,760 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-07-20 21:14:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 21:14:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 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) Word has length 40 [2022-07-20 21:14:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:34,761 INFO L225 Difference]: With dead ends: 80 [2022-07-20 21:14:34,761 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 21:14:34,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:14:34,762 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:34,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 64 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 21:14:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-20 21:14:34,766 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) [2022-07-20 21:14:34,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-20 21:14:34,766 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-07-20 21:14:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:34,767 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-20 21:14:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 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) [2022-07-20 21:14:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-20 21:14:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:14:34,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:34,768 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:34,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:34,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:34,969 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:34,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 7 times [2022-07-20 21:14:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259149975] [2022-07-20 21:14:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:35,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259149975] [2022-07-20 21:14:35,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259149975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:35,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552665568] [2022-07-20 21:14:35,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:14:35,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:35,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:35,347 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) [2022-07-20 21:14:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:14:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 21:14:35,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:35,404 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 [2022-07-20 21:14:35,418 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:35,419 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 [2022-07-20 21:14:35,428 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:35,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:14:35,446 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:35,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:14:35,456 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:35,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:14:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:35,467 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 31 treesize of output 30 [2022-07-20 21:14:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:35,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:14:35,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:35,569 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:14:35,714 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 [2022-07-20 21:14:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 13 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:35,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:46,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2022-07-20 21:14:46,285 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 1658 treesize of output 1626 [2022-07-20 21:14:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:47,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552665568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:47,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:47,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 38 [2022-07-20 21:14:47,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951328015] [2022-07-20 21:14:47,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 21:14:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:47,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 21:14:47,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1130, Unknown=5, NotChecked=0, Total=1406 [2022-07-20 21:14:47,156 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 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) [2022-07-20 21:14:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:53,912 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-07-20 21:14:53,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 21:14:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 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 44 [2022-07-20 21:14:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:53,915 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:14:53,915 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 21:14:53,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1318, Invalid=4834, Unknown=10, NotChecked=0, Total=6162 [2022-07-20 21:14:53,917 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:53,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 149 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 440 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-07-20 21:14:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 21:14:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2022-07-20 21:14:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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) [2022-07-20 21:14:53,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-07-20 21:14:53,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 44 [2022-07-20 21:14:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:53,935 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-07-20 21:14:53,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 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) [2022-07-20 21:14:53,936 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-07-20 21:14:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:14:53,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:53,937 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:53,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:54,149 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 8 times [2022-07-20 21:14:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:54,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703598675] [2022-07-20 21:14:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:54,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:54,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703598675] [2022-07-20 21:14:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703598675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:54,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050662102] [2022-07-20 21:14:54,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:14:54,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:54,212 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) [2022-07-20 21:14:54,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:14:54,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:14:54,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 21:14:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 63 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:54,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050662102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:54,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:54,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 21 [2022-07-20 21:14:54,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727334235] [2022-07-20 21:14:54,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:54,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 21:14:54,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 21:14:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2022-07-20 21:14:54,490 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 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) [2022-07-20 21:14:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:54,596 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-07-20 21:14:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:14:54,596 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 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 [2022-07-20 21:14:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:54,597 INFO L225 Difference]: With dead ends: 92 [2022-07-20 21:14:54,597 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 21:14:54,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-07-20 21:14:54,598 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:54,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 74 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 21:14:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-07-20 21:14:54,602 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) [2022-07-20 21:14:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-20 21:14:54,602 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2022-07-20 21:14:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:54,603 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-20 21:14:54,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.476190476190476) internal successors, (94), 21 states have internal predecessors, (94), 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) [2022-07-20 21:14:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-20 21:14:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:14:54,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:54,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:54,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:54,818 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,SelfDestructingSolverStorable11 [2022-07-20 21:14:54,818 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:54,818 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 9 times [2022-07-20 21:14:54,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:54,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016116007] [2022-07-20 21:14:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 26 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:55,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016116007] [2022-07-20 21:14:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016116007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:55,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201660245] [2022-07-20 21:14:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:14:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:55,315 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) [2022-07-20 21:14:55,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:14:55,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:14:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 21:14:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:55,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:14:55,472 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:55,472 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 [2022-07-20 21:14:55,481 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:55,482 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 [2022-07-20 21:14:55,504 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:55,505 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 [2022-07-20 21:14:55,523 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:55,523 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 [2022-07-20 21:14:55,550 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:55,550 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 [2022-07-20 21:14:55,560 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:55,561 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 [2022-07-20 21:14:55,586 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:55,586 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 [2022-07-20 21:14:55,596 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:55,596 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 [2022-07-20 21:14:55,659 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:55,659 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 [2022-07-20 21:14:55,867 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 [2022-07-20 21:14:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 16 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:55,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 30 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:56,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201660245] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:56,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:56,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 43 [2022-07-20 21:14:56,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137493936] [2022-07-20 21:14:56,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:56,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 21:14:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:56,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 21:14:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:14:56,352 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 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) [2022-07-20 21:14:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:57,528 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-07-20 21:14:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 21:14:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 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 [2022-07-20 21:14:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:57,529 INFO L225 Difference]: With dead ends: 70 [2022-07-20 21:14:57,529 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 21:14:57,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1200, Invalid=4806, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 21:14:57,531 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 188 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 600 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-20 21:14:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 21:14:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2022-07-20 21:14:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 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) [2022-07-20 21:14:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-20 21:14:57,536 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2022-07-20 21:14:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:57,537 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-20 21:14:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.395348837209302) internal successors, (146), 43 states have internal predecessors, (146), 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) [2022-07-20 21:14:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-20 21:14:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:14:57,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:57,538 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:57,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:14:57,738 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 10 times [2022-07-20 21:14:57,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:57,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003366890] [2022-07-20 21:14:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:57,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003366890] [2022-07-20 21:14:57,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003366890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:57,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722279939] [2022-07-20 21:14:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:14:57,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:57,810 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) [2022-07-20 21:14:57,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:14:57,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:14:57,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 21:14:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:58,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 88 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:58,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722279939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:58,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:58,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 24 [2022-07-20 21:14:58,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644006020] [2022-07-20 21:14:58,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:58,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:14:58,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:58,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:14:58,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:14:58,132 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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) [2022-07-20 21:14:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:58,235 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-07-20 21:14:58,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 21:14:58,235 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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) Word has length 56 [2022-07-20 21:14:58,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:58,236 INFO L225 Difference]: With dead ends: 104 [2022-07-20 21:14:58,236 INFO L226 Difference]: Without dead ends: 63 [2022-07-20 21:14:58,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2022-07-20 21:14:58,237 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:58,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-20 21:14:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-07-20 21:14:58,244 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) [2022-07-20 21:14:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-20 21:14:58,244 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-07-20 21:14:58,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:58,244 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-20 21:14:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 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) [2022-07-20 21:14:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-20 21:14:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 21:14:58,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:58,246 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:58,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:58,464 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,SelfDestructingSolverStorable13 [2022-07-20 21:14:58,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 11 times [2022-07-20 21:14:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:58,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574682295] [2022-07-20 21:14:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:58,782 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:58,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574682295] [2022-07-20 21:14:58,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574682295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322207460] [2022-07-20 21:14:58,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:14:58,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:58,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:58,784 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) [2022-07-20 21:14:58,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:14:58,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:14:58,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:58,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 21:14:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:58,933 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 [2022-07-20 21:14:58,969 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:58,969 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 [2022-07-20 21:14:58,987 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:58,988 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 [2022-07-20 21:14:59,010 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:59,011 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 [2022-07-20 21:14:59,018 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:59,019 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 30 treesize of output 29 [2022-07-20 21:14:59,045 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:59,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:14:59,059 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:59,060 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 [2022-07-20 21:14:59,091 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:59,091 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 [2022-07-20 21:14:59,107 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:59,107 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 [2022-07-20 21:14:59,132 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:14:59,132 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 [2022-07-20 21:14:59,141 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:14:59,141 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 30 treesize of output 29 [2022-07-20 21:14:59,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:59,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:14:59,518 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 [2022-07-20 21:14:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:59,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:59,951 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 [2022-07-20 21:14:59,954 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 [2022-07-20 21:14:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 36 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:59,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322207460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:59,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:59,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 42 [2022-07-20 21:14:59,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479992760] [2022-07-20 21:14:59,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:59,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:14:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:59,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:14:59,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:14:59,960 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 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) [2022-07-20 21:15:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:00,890 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2022-07-20 21:15:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 21:15:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 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 [2022-07-20 21:15:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:00,891 INFO L225 Difference]: With dead ends: 79 [2022-07-20 21:15:00,891 INFO L226 Difference]: Without dead ends: 77 [2022-07-20 21:15:00,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1124, Invalid=4576, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 21:15:00,895 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 95 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:00,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 253 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 595 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-07-20 21:15:00,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-20 21:15:00,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 65. [2022-07-20 21:15:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 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) [2022-07-20 21:15:00,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-07-20 21:15:00,904 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 60 [2022-07-20 21:15:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:00,904 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-07-20 21:15:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5) internal successors, (147), 42 states have internal predecessors, (147), 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) [2022-07-20 21:15:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-07-20 21:15:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 21:15:00,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:00,905 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:00,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:01,122 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,SelfDestructingSolverStorable14 [2022-07-20 21:15:01,122 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:01,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:01,123 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 12 times [2022-07-20 21:15:01,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:01,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320093038] [2022-07-20 21:15:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:01,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:01,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:01,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320093038] [2022-07-20 21:15:01,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320093038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947984264] [2022-07-20 21:15:01,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:01,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:01,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:01,211 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) [2022-07-20 21:15:01,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:15:01,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 21:15:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 21:15:01,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:01,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947984264] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:01,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:01,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 27 [2022-07-20 21:15:01,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132049113] [2022-07-20 21:15:01,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:01,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 21:15:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 21:15:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=422, Unknown=0, NotChecked=0, Total=702 [2022-07-20 21:15:01,638 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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) [2022-07-20 21:15:01,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:01,749 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-07-20 21:15:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 21:15:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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 [2022-07-20 21:15:01,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:01,750 INFO L225 Difference]: With dead ends: 116 [2022-07-20 21:15:01,750 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 21:15:01,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=456, Unknown=0, NotChecked=0, Total=756 [2022-07-20 21:15:01,750 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:01,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 96 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 21:15:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-20 21:15:01,756 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) [2022-07-20 21:15:01,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-20 21:15:01,756 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 64 [2022-07-20 21:15:01,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:01,756 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-20 21:15:01,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.666666666666667) internal successors, (126), 27 states have internal predecessors, (126), 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) [2022-07-20 21:15:01,757 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-20 21:15:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 21:15:01,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:01,757 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:01,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 21:15:01,974 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,SelfDestructingSolverStorable15 [2022-07-20 21:15:01,974 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:01,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:01,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 13 times [2022-07-20 21:15:01,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:01,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339248222] [2022-07-20 21:15:01,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:01,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:02,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339248222] [2022-07-20 21:15:02,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339248222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630004010] [2022-07-20 21:15:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:02,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:02,282 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) [2022-07-20 21:15:02,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:15:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:02,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-20 21:15:02,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:02,380 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 [2022-07-20 21:15:02,413 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,413 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 [2022-07-20 21:15:02,420 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,421 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 [2022-07-20 21:15:02,443 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,443 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 [2022-07-20 21:15:02,451 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,452 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 [2022-07-20 21:15:02,473 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,473 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 [2022-07-20 21:15:02,481 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,481 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 [2022-07-20 21:15:02,503 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,503 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 [2022-07-20 21:15:02,510 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:02,531 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:15:02,538 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,538 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 [2022-07-20 21:15:02,568 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:02,568 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 [2022-07-20 21:15:02,578 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:02,578 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 30 treesize of output 29 [2022-07-20 21:15:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:03,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 22 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:03,689 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 [2022-07-20 21:15:03,691 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 [2022-07-20 21:15:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 42 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:03,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630004010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:03,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:03,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 45 [2022-07-20 21:15:03,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427866240] [2022-07-20 21:15:03,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:03,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:15:03,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:03,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:15:03,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:15:03,700 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 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) [2022-07-20 21:15:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:08,534 INFO L93 Difference]: Finished difference Result 242 states and 288 transitions. [2022-07-20 21:15:08,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-07-20 21:15:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 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 68 [2022-07-20 21:15:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:08,537 INFO L225 Difference]: With dead ends: 242 [2022-07-20 21:15:08,537 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 21:15:08,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 140 SyntacticMatches, 16 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13665 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5370, Invalid=31302, Unknown=0, NotChecked=0, Total=36672 [2022-07-20 21:15:08,543 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:08,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 443 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1042 Invalid, 0 Unknown, 277 Unchecked, 0.6s Time] [2022-07-20 21:15:08,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 21:15:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 73. [2022-07-20 21:15:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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) [2022-07-20 21:15:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-20 21:15:08,571 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-07-20 21:15:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:08,571 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-20 21:15:08,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.7111111111111112) internal successors, (167), 45 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) [2022-07-20 21:15:08,571 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-20 21:15:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 21:15:08,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:08,574 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:08,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:08,792 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,SelfDestructingSolverStorable16 [2022-07-20 21:15:08,792 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:08,792 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 14 times [2022-07-20 21:15:08,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:08,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215473163] [2022-07-20 21:15:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:08,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:08,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215473163] [2022-07-20 21:15:08,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215473163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:08,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641316530] [2022-07-20 21:15:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:08,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:08,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:08,904 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) [2022-07-20 21:15:08,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:15:08,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:08,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:08,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:15:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:09,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 150 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:09,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641316530] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:09,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:09,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 30 [2022-07-20 21:15:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306020605] [2022-07-20 21:15:09,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:09,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:15:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:15:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=524, Unknown=0, NotChecked=0, Total=870 [2022-07-20 21:15:09,290 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2022-07-20 21:15:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:09,401 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-07-20 21:15:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:15:09,401 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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 [2022-07-20 21:15:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:09,402 INFO L225 Difference]: With dead ends: 128 [2022-07-20 21:15:09,402 INFO L226 Difference]: Without dead ends: 79 [2022-07-20 21:15:09,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=368, Invalid=562, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:15:09,402 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:09,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 90 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:09,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-20 21:15:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-07-20 21:15:09,409 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) [2022-07-20 21:15:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-07-20 21:15:09,409 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 72 [2022-07-20 21:15:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:09,409 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-07-20 21:15:09,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.733333333333333) internal successors, (142), 30 states have internal predecessors, (142), 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) [2022-07-20 21:15:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-07-20 21:15:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 21:15:09,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:09,410 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:09,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:09,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:09,621 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:09,621 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 15 times [2022-07-20 21:15:09,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:09,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657838533] [2022-07-20 21:15:09,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:09,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 25 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:09,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657838533] [2022-07-20 21:15:09,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657838533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88357419] [2022-07-20 21:15:09,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:09,966 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) [2022-07-20 21:15:09,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:15:10,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-20 21:15:10,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 21:15:10,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:10,242 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 [2022-07-20 21:15:10,286 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,286 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 [2022-07-20 21:15:10,297 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,297 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 [2022-07-20 21:15:10,327 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:10,337 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,337 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 [2022-07-20 21:15:10,361 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,361 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 [2022-07-20 21:15:10,369 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,369 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 [2022-07-20 21:15:10,393 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,393 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 [2022-07-20 21:15:10,400 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,401 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 [2022-07-20 21:15:10,425 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,425 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 [2022-07-20 21:15:10,469 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,469 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 [2022-07-20 21:15:10,493 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,493 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 [2022-07-20 21:15:10,500 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,500 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 [2022-07-20 21:15:10,523 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:10,523 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 [2022-07-20 21:15:10,531 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,531 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 [2022-07-20 21:15:10,619 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:10,619 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 [2022-07-20 21:15:10,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-07-20 21:15:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:10,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:12,143 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 24 treesize of output 22 [2022-07-20 21:15:12,149 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 192 treesize of output 184 [2022-07-20 21:15:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 48 proven. 233 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:12,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88357419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:12,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:12,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 59 [2022-07-20 21:15:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264981947] [2022-07-20 21:15:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-20 21:15:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-20 21:15:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2856, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 21:15:12,176 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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) [2022-07-20 21:15:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:14,665 INFO L93 Difference]: Finished difference Result 203 states and 218 transitions. [2022-07-20 21:15:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-20 21:15:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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 [2022-07-20 21:15:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:14,666 INFO L225 Difference]: With dead ends: 203 [2022-07-20 21:15:14,666 INFO L226 Difference]: Without dead ends: 201 [2022-07-20 21:15:14,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 159 SyntacticMatches, 16 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6246 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2516, Invalid=16390, Unknown=0, NotChecked=0, Total=18906 [2022-07-20 21:15:14,668 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 354 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:14,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 486 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 896 Invalid, 0 Unknown, 420 Unchecked, 0.5s Time] [2022-07-20 21:15:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-20 21:15:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 121. [2022-07-20 21:15:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 states have internal predecessors, (125), 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) [2022-07-20 21:15:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-07-20 21:15:14,681 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 76 [2022-07-20 21:15:14,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:14,681 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-07-20 21:15:14,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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) [2022-07-20 21:15:14,681 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-07-20 21:15:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 21:15:14,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:14,682 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:14,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:14,897 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:14,897 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 16 times [2022-07-20 21:15:14,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:14,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813902549] [2022-07-20 21:15:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:15,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813902549] [2022-07-20 21:15:15,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813902549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:15,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917827799] [2022-07-20 21:15:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:15:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:15,249 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) [2022-07-20 21:15:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:15:15,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:15:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 21:15:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:15,352 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 [2022-07-20 21:15:15,398 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,399 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 [2022-07-20 21:15:15,409 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:15,440 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,440 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 [2022-07-20 21:15:15,447 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,447 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 [2022-07-20 21:15:15,470 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,470 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 [2022-07-20 21:15:15,477 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,477 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 [2022-07-20 21:15:15,501 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,502 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 [2022-07-20 21:15:15,509 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,509 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 [2022-07-20 21:15:15,533 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,533 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 [2022-07-20 21:15:15,550 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,550 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 [2022-07-20 21:15:15,575 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,575 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 31 treesize of output 30 [2022-07-20 21:15:15,582 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:15,605 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,605 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 [2022-07-20 21:15:15,612 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,612 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 30 treesize of output 29 [2022-07-20 21:15:15,635 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:15,650 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 31 treesize of output 30 [2022-07-20 21:15:15,661 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:15,661 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 [2022-07-20 21:15:15,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:15,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:16,192 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 [2022-07-20 21:15:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 28 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:16,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:17,057 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 [2022-07-20 21:15:17,059 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 [2022-07-20 21:15:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 54 proven. 298 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:17,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917827799] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:17,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:17,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 53 [2022-07-20 21:15:17,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875096712] [2022-07-20 21:15:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:17,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 21:15:17,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 21:15:17,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:15:17,066 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 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) [2022-07-20 21:15:20,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:20,179 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2022-07-20 21:15:20,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 21:15:20,180 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 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 [2022-07-20 21:15:20,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:20,181 INFO L225 Difference]: With dead ends: 179 [2022-07-20 21:15:20,181 INFO L226 Difference]: Without dead ends: 177 [2022-07-20 21:15:20,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 154 SyntacticMatches, 22 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5609 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2913, Invalid=12587, Unknown=0, NotChecked=0, Total=15500 [2022-07-20 21:15:20,182 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 326 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:20,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 472 Invalid, 1541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1290 Invalid, 0 Unknown, 23 Unchecked, 0.6s Time] [2022-07-20 21:15:20,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-20 21:15:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 121. [2022-07-20 21:15:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0416666666666667) internal successors, (125), 120 states have internal predecessors, (125), 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) [2022-07-20 21:15:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-07-20 21:15:20,208 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 84 [2022-07-20 21:15:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:20,209 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-07-20 21:15:20,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 53 states have internal predecessors, (207), 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) [2022-07-20 21:15:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-07-20 21:15:20,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-20 21:15:20,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:20,210 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:20,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:20,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:20,412 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 17 times [2022-07-20 21:15:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:20,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458580422] [2022-07-20 21:15:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:20,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458580422] [2022-07-20 21:15:20,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458580422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:20,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869092103] [2022-07-20 21:15:20,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:20,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:20,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:20,594 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) [2022-07-20 21:15:20,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:15:20,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-20 21:15:20,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 21:15:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:21,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 228 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:21,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869092103] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:21,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:21,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 24] total 36 [2022-07-20 21:15:21,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769361150] [2022-07-20 21:15:21,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:21,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 21:15:21,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:21,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 21:15:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=761, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:15:21,307 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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) [2022-07-20 21:15:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:21,488 INFO L93 Difference]: Finished difference Result 222 states and 229 transitions. [2022-07-20 21:15:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 21:15:21,488 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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 [2022-07-20 21:15:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:21,489 INFO L225 Difference]: With dead ends: 222 [2022-07-20 21:15:21,489 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 21:15:21,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=855, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 21:15:21,492 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:21,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 132 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 21:15:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-07-20 21:15:21,503 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) [2022-07-20 21:15:21,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-20 21:15:21,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 88 [2022-07-20 21:15:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:21,504 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-20 21:15:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 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) [2022-07-20 21:15:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-20 21:15:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 21:15:21,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:21,505 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:21,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:21,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:21,720 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 18 times [2022-07-20 21:15:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:21,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707778181] [2022-07-20 21:15:21,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:22,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707778181] [2022-07-20 21:15:22,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707778181] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:22,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185208817] [2022-07-20 21:15:22,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:22,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:22,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:22,100 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) [2022-07-20 21:15:22,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:15:22,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-20 21:15:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-20 21:15:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:22,536 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 [2022-07-20 21:15:22,546 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,546 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 [2022-07-20 21:15:22,555 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,555 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 [2022-07-20 21:15:22,567 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,567 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 31 treesize of output 30 [2022-07-20 21:15:22,576 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,576 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 [2022-07-20 21:15:22,588 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,588 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 31 treesize of output 30 [2022-07-20 21:15:22,597 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,597 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 [2022-07-20 21:15:22,609 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,610 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 [2022-07-20 21:15:22,619 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,619 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 [2022-07-20 21:15:22,631 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,631 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 [2022-07-20 21:15:22,641 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:22,653 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,653 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 [2022-07-20 21:15:22,662 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,663 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 [2022-07-20 21:15:22,673 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,673 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 [2022-07-20 21:15:22,680 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:22,690 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,690 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 [2022-07-20 21:15:22,699 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,700 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 [2022-07-20 21:15:22,709 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:22,709 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 [2022-07-20 21:15:22,716 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:22,716 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 [2022-07-20 21:15:22,766 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-20 21:15:22,767 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 21 treesize of output 20 [2022-07-20 21:15:23,014 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 [2022-07-20 21:15:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 31 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:23,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 60 proven. 371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:23,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185208817] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:23,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:23,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 27, 28] total 43 [2022-07-20 21:15:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910111753] [2022-07-20 21:15:23,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:23,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 21:15:23,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 21:15:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:15:23,741 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 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) [2022-07-20 21:15:25,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:25,259 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-07-20 21:15:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 21:15:25,259 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 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 92 [2022-07-20 21:15:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:25,260 INFO L225 Difference]: With dead ends: 111 [2022-07-20 21:15:25,260 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 21:15:25,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 174 SyntacticMatches, 22 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1737, Invalid=7193, Unknown=0, NotChecked=0, Total=8930 [2022-07-20 21:15:25,262 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 295 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:25,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 363 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 21:15:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 21:15:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2022-07-20 21:15:25,280 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) [2022-07-20 21:15:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-07-20 21:15:25,288 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 92 [2022-07-20 21:15:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:25,289 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-07-20 21:15:25,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.255813953488372) internal successors, (183), 43 states have internal predecessors, (183), 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) [2022-07-20 21:15:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-07-20 21:15:25,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 21:15:25,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:25,289 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:25,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 21:15:25,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:25,507 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:25,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:25,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 19 times [2022-07-20 21:15:25,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:25,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102653953] [2022-07-20 21:15:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:25,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102653953] [2022-07-20 21:15:25,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102653953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:25,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433119879] [2022-07-20 21:15:25,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:25,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:25,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:25,664 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) [2022-07-20 21:15:25,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:15:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:25,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:15:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:26,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 273 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:26,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433119879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:26,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:26,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 39 [2022-07-20 21:15:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263528793] [2022-07-20 21:15:26,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 21:15:26,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 21:15:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=896, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 21:15:26,347 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 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) [2022-07-20 21:15:26,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:26,507 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-07-20 21:15:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:15:26,508 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 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 [2022-07-20 21:15:26,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:26,508 INFO L225 Difference]: With dead ends: 164 [2022-07-20 21:15:26,509 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 21:15:26,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=946, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:15:26,509 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:26,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 130 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 21:15:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-07-20 21:15:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 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) [2022-07-20 21:15:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-07-20 21:15:26,522 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2022-07-20 21:15:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:26,522 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-07-20 21:15:26,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.871794871794871) internal successors, (190), 39 states have internal predecessors, (190), 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) [2022-07-20 21:15:26,522 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-07-20 21:15:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-20 21:15:26,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:26,523 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:26,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 21:15:26,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:26,739 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:26,740 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 20 times [2022-07-20 21:15:26,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:26,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28131513] [2022-07-20 21:15:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:26,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:27,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28131513] [2022-07-20 21:15:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28131513] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:27,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83525178] [2022-07-20 21:15:27,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:27,173 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) [2022-07-20 21:15:27,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:15:27,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:27,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:27,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-20 21:15:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:27,321 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 15 treesize of output 11 [2022-07-20 21:15:27,380 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,380 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 31 treesize of output 30 [2022-07-20 21:15:27,390 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,391 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 [2022-07-20 21:15:27,425 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,425 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 [2022-07-20 21:15:27,435 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,435 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 [2022-07-20 21:15:27,470 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,470 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 [2022-07-20 21:15:27,481 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,481 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 [2022-07-20 21:15:27,525 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,526 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 [2022-07-20 21:15:27,552 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,553 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 [2022-07-20 21:15:27,591 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,591 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 [2022-07-20 21:15:27,602 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,602 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 [2022-07-20 21:15:27,640 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,640 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 [2022-07-20 21:15:27,651 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:27,689 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,689 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 [2022-07-20 21:15:27,701 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:27,739 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,739 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 [2022-07-20 21:15:27,751 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,751 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 [2022-07-20 21:15:27,791 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,791 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 [2022-07-20 21:15:27,801 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,801 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 [2022-07-20 21:15:27,862 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:27,862 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 [2022-07-20 21:15:27,872 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:27,872 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 [2022-07-20 21:15:27,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:27,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:28,658 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 [2022-07-20 21:15:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 34 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:28,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:29,676 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 [2022-07-20 21:15:29,678 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 [2022-07-20 21:15:29,682 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 66 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:29,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83525178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:29,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:29,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 30, 30] total 62 [2022-07-20 21:15:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271717789] [2022-07-20 21:15:29,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:29,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 21:15:29,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:29,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 21:15:29,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3286, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 21:15:29,684 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 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) [2022-07-20 21:15:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:32,186 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-07-20 21:15:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-20 21:15:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 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 [2022-07-20 21:15:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:32,187 INFO L225 Difference]: With dead ends: 119 [2022-07-20 21:15:32,187 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 21:15:32,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 185 SyntacticMatches, 27 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2557, Invalid=11485, Unknown=0, NotChecked=0, Total=14042 [2022-07-20 21:15:32,188 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 295 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:32,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 541 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1551 Invalid, 0 Unknown, 27 Unchecked, 0.7s Time] [2022-07-20 21:15:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 21:15:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2022-07-20 21:15:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 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) [2022-07-20 21:15:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-20 21:15:32,211 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2022-07-20 21:15:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:32,211 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-20 21:15:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9838709677419355) internal successors, (247), 62 states have internal predecessors, (247), 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) [2022-07-20 21:15:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-20 21:15:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-20 21:15:32,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:32,212 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:32,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-20 21:15:32,427 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,SelfDestructingSolverStorable23 [2022-07-20 21:15:32,427 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 21 times [2022-07-20 21:15:32,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:32,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294768928] [2022-07-20 21:15:32,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:32,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:32,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:32,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294768928] [2022-07-20 21:15:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294768928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:32,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965612437] [2022-07-20 21:15:32,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:32,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:32,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:32,587 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) [2022-07-20 21:15:32,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 21:15:33,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 21:15:33,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:33,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 21:15:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:33,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 322 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:33,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965612437] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:33,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:33,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 28] total 42 [2022-07-20 21:15:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486507707] [2022-07-20 21:15:33,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:33,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:15:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:15:33,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1042, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:15:33,595 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 states have internal predecessors, (206), 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) [2022-07-20 21:15:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:33,763 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-07-20 21:15:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 21:15:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 states have internal predecessors, (206), 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 [2022-07-20 21:15:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:33,769 INFO L225 Difference]: With dead ends: 176 [2022-07-20 21:15:33,769 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 21:15:33,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=710, Invalid=1096, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 21:15:33,770 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:33,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 180 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:33,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 21:15:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-07-20 21:15:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 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) [2022-07-20 21:15:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-07-20 21:15:33,784 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-07-20 21:15:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:33,784 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-07-20 21:15:33,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.904761904761905) internal successors, (206), 42 states have internal predecessors, (206), 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) [2022-07-20 21:15:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-07-20 21:15:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 21:15:33,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:33,785 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:33,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:33,987 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,SelfDestructingSolverStorable24 [2022-07-20 21:15:33,987 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:33,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:33,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 22 times [2022-07-20 21:15:33,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:33,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85027933] [2022-07-20 21:15:33,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:33,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85027933] [2022-07-20 21:15:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85027933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879900842] [2022-07-20 21:15:34,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:15:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:34,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:34,983 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) [2022-07-20 21:15:35,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 21:15:35,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:15:35,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:35,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-20 21:15:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:35,141 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 [2022-07-20 21:15:35,206 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,207 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 [2022-07-20 21:15:35,217 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,217 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 [2022-07-20 21:15:35,258 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,259 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 [2022-07-20 21:15:35,269 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,269 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 [2022-07-20 21:15:35,308 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,309 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 [2022-07-20 21:15:35,318 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,318 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 30 treesize of output 29 [2022-07-20 21:15:35,359 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,359 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 [2022-07-20 21:15:35,369 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,369 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 [2022-07-20 21:15:35,410 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,410 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 [2022-07-20 21:15:35,420 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,421 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 [2022-07-20 21:15:35,462 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,462 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 [2022-07-20 21:15:35,476 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,476 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 [2022-07-20 21:15:35,505 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,505 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 [2022-07-20 21:15:35,512 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:35,542 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,542 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 [2022-07-20 21:15:35,549 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,550 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 [2022-07-20 21:15:35,589 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,589 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 [2022-07-20 21:15:35,596 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,597 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 [2022-07-20 21:15:35,629 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,629 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 [2022-07-20 21:15:35,636 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:35,665 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:35,665 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 [2022-07-20 21:15:35,674 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:35,674 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 [2022-07-20 21:15:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:35,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:15:36,290 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 [2022-07-20 21:15:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 37 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:36,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:38,145 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 24 treesize of output 22 [2022-07-20 21:15:38,148 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 192 treesize of output 184 [2022-07-20 21:15:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 72 proven. 541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:38,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879900842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:38,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:38,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 91 [2022-07-20 21:15:38,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917537543] [2022-07-20 21:15:38,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-20 21:15:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:38,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-20 21:15:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=6933, Unknown=0, NotChecked=0, Total=8190 [2022-07-20 21:15:38,179 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 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) [2022-07-20 21:15:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:41,993 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2022-07-20 21:15:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-20 21:15:41,993 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 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 [2022-07-20 21:15:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:41,994 INFO L225 Difference]: With dead ends: 126 [2022-07-20 21:15:41,996 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 21:15:41,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 180 SyntacticMatches, 23 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8316 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3412, Invalid=15770, Unknown=0, NotChecked=0, Total=19182 [2022-07-20 21:15:41,997 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 287 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:41,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 583 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1560 Invalid, 0 Unknown, 473 Unchecked, 0.8s Time] [2022-07-20 21:15:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 21:15:42,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2022-07-20 21:15:42,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 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) [2022-07-20 21:15:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-07-20 21:15:42,018 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2022-07-20 21:15:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:42,019 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-07-20 21:15:42,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.4505494505494507) internal successors, (314), 91 states have internal predecessors, (314), 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) [2022-07-20 21:15:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-07-20 21:15:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-20 21:15:42,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:42,019 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:42,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 21:15:42,229 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 23 times [2022-07-20 21:15:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:42,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336918883] [2022-07-20 21:15:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:42,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336918883] [2022-07-20 21:15:42,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336918883] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:42,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097102883] [2022-07-20 21:15:42,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:42,386 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) [2022-07-20 21:15:42,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 21:15:42,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-20 21:15:42,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 21:15:42,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:43,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 375 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:43,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097102883] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:43,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:43,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 45 [2022-07-20 21:15:43,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646417648] [2022-07-20 21:15:43,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:43,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 21:15:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 21:15:43,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=1199, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 21:15:43,398 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 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) [2022-07-20 21:15:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:43,568 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-07-20 21:15:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 21:15:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 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 [2022-07-20 21:15:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:43,569 INFO L225 Difference]: With dead ends: 188 [2022-07-20 21:15:43,569 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 21:15:43,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=813, Invalid=1257, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 21:15:43,570 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 63 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:43,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 180 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 21:15:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-07-20 21:15:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 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) [2022-07-20 21:15:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-07-20 21:15:43,595 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 112 [2022-07-20 21:15:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:43,596 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-07-20 21:15:43,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.933333333333334) internal successors, (222), 45 states have internal predecessors, (222), 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) [2022-07-20 21:15:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-07-20 21:15:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 21:15:43,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:43,597 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:43,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:43,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:43,813 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:43,814 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 24 times [2022-07-20 21:15:43,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:43,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500190750] [2022-07-20 21:15:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:43,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500190750] [2022-07-20 21:15:44,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500190750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:44,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070357198] [2022-07-20 21:15:44,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:44,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:44,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:44,303 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) [2022-07-20 21:15:44,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 21:15:45,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-20 21:15:45,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:45,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-20 21:15:45,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:45,689 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 [2022-07-20 21:15:45,699 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,700 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 [2022-07-20 21:15:45,708 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,709 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 [2022-07-20 21:15:45,721 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,721 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 [2022-07-20 21:15:45,730 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,730 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 [2022-07-20 21:15:45,742 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,742 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 [2022-07-20 21:15:45,751 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,751 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 [2022-07-20 21:15:45,763 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,763 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 [2022-07-20 21:15:45,772 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,773 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 [2022-07-20 21:15:45,784 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,785 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 [2022-07-20 21:15:45,794 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,794 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 [2022-07-20 21:15:45,806 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,806 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 [2022-07-20 21:15:45,815 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,816 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 [2022-07-20 21:15:45,827 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,828 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 [2022-07-20 21:15:45,837 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,837 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 [2022-07-20 21:15:45,849 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,850 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 31 treesize of output 30 [2022-07-20 21:15:45,858 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,858 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 [2022-07-20 21:15:45,870 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,870 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 [2022-07-20 21:15:45,879 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,879 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 [2022-07-20 21:15:45,891 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,891 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 [2022-07-20 21:15:45,900 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,901 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 [2022-07-20 21:15:45,912 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,913 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 [2022-07-20 21:15:45,922 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,922 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 [2022-07-20 21:15:45,934 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:45,934 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 [2022-07-20 21:15:45,943 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:45,943 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 [2022-07-20 21:15:46,010 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-20 21:15:46,010 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 21 treesize of output 20 [2022-07-20 21:15:46,340 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 19 treesize of output 7 [2022-07-20 21:15:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 40 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:46,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 78 proven. 638 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:47,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070357198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:47,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:47,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33, 34] total 52 [2022-07-20 21:15:47,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364597387] [2022-07-20 21:15:47,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:47,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-20 21:15:47,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-20 21:15:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 21:15:47,381 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 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) [2022-07-20 21:15:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:49,987 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2022-07-20 21:15:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-20 21:15:49,987 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 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 [2022-07-20 21:15:49,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:49,988 INFO L225 Difference]: With dead ends: 135 [2022-07-20 21:15:49,988 INFO L226 Difference]: Without dead ends: 133 [2022-07-20 21:15:49,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2520, Invalid=10820, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:15:49,989 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 469 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:49,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 648 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 21:15:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-20 21:15:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2022-07-20 21:15:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 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) [2022-07-20 21:15:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-07-20 21:15:50,015 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 116 [2022-07-20 21:15:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:50,015 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-07-20 21:15:50,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.4423076923076925) internal successors, (231), 52 states have internal predecessors, (231), 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) [2022-07-20 21:15:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-07-20 21:15:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 21:15:50,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:50,016 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:50,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:50,224 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,SelfDestructingSolverStorable27 [2022-07-20 21:15:50,224 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:50,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:50,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 25 times [2022-07-20 21:15:50,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:50,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833314385] [2022-07-20 21:15:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:50,408 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:50,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833314385] [2022-07-20 21:15:50,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833314385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:50,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480882288] [2022-07-20 21:15:50,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:50,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:50,424 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) [2022-07-20 21:15:50,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 21:15:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:50,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 21:15:50,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:50,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 432 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480882288] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:51,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:51,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 32, 32] total 48 [2022-07-20 21:15:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18343342] [2022-07-20 21:15:51,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:51,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 21:15:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 21:15:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=889, Invalid=1367, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 21:15:51,152 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 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) [2022-07-20 21:15:51,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:51,340 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-07-20 21:15:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 21:15:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 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 [2022-07-20 21:15:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:51,342 INFO L225 Difference]: With dead ends: 200 [2022-07-20 21:15:51,343 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 21:15:51,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 21:15:51,347 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 100 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:51,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 150 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:51,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 21:15:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-07-20 21:15:51,364 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) [2022-07-20 21:15:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-07-20 21:15:51,366 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2022-07-20 21:15:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:51,367 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-07-20 21:15:51,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.958333333333333) internal successors, (238), 48 states have internal predecessors, (238), 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) [2022-07-20 21:15:51,367 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-07-20 21:15:51,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 21:15:51,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:51,368 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:51,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-20 21:15:51,583 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,SelfDestructingSolverStorable28 [2022-07-20 21:15:51,583 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:51,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:51,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 26 times [2022-07-20 21:15:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050741499] [2022-07-20 21:15:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 80 proven. 747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:52,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050741499] [2022-07-20 21:15:52,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050741499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528961567] [2022-07-20 21:15:52,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:52,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:52,773 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) [2022-07-20 21:15:52,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 21:15:52,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:52,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 123 conjunts are in the unsatisfiable core [2022-07-20 21:15:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:52,991 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 [2022-07-20 21:15:53,005 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,005 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 [2022-07-20 21:15:53,016 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,016 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 [2022-07-20 21:15:53,032 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,032 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 [2022-07-20 21:15:53,044 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,044 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 [2022-07-20 21:15:53,059 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,060 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 [2022-07-20 21:15:53,070 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,070 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 [2022-07-20 21:15:53,086 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,086 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 [2022-07-20 21:15:53,096 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,097 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 [2022-07-20 21:15:53,112 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,113 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 [2022-07-20 21:15:53,127 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,127 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 30 treesize of output 29 [2022-07-20 21:15:53,143 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,143 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 [2022-07-20 21:15:53,154 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,154 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 [2022-07-20 21:15:53,169 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,170 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 [2022-07-20 21:15:53,180 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,180 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 [2022-07-20 21:15:53,195 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,196 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 [2022-07-20 21:15:53,206 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,206 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 [2022-07-20 21:15:53,222 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,222 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 [2022-07-20 21:15:53,232 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,232 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 [2022-07-20 21:15:53,248 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:15:53,258 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,259 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 [2022-07-20 21:15:53,274 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,274 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 [2022-07-20 21:15:53,284 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,285 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 [2022-07-20 21:15:53,300 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,301 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 [2022-07-20 21:15:53,310 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,310 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 [2022-07-20 21:15:53,327 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:15:53,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:15:53,337 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:15:53,338 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 [2022-07-20 21:15:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:15:53,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:15:54,092 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 [2022-07-20 21:15:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 43 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:54,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:56,235 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 24 treesize of output 22 [2022-07-20 21:15:56,237 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 86 treesize of output 82 [2022-07-20 21:15:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 84 proven. 743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:56,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528961567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:56,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:56,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 87 [2022-07-20 21:15:56,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961016318] [2022-07-20 21:15:56,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:56,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-20 21:15:56,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:56,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-20 21:15:56,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=6526, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 21:15:56,244 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 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) [2022-07-20 21:15:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:58,903 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-07-20 21:15:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-20 21:15:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 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 124 [2022-07-20 21:15:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:58,905 INFO L225 Difference]: With dead ends: 137 [2022-07-20 21:15:58,905 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 21:15:58,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 224 SyntacticMatches, 29 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7433 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3405, Invalid=15227, Unknown=0, NotChecked=0, Total=18632 [2022-07-20 21:15:58,919 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 415 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 723 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:58,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 956 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1745 Invalid, 0 Unknown, 723 Unchecked, 0.8s Time] [2022-07-20 21:15:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 21:15:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2022-07-20 21:15:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 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) [2022-07-20 21:15:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-07-20 21:15:58,959 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 124 [2022-07-20 21:15:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:58,960 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-07-20 21:15:58,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.091954022988506) internal successors, (356), 87 states have internal predecessors, (356), 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) [2022-07-20 21:15:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-07-20 21:15:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 21:15:58,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:58,961 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:58,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:59,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:59,176 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 27 times [2022-07-20 21:15:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954914978] [2022-07-20 21:15:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:59,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954914978] [2022-07-20 21:15:59,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954914978] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:59,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367474357] [2022-07-20 21:15:59,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:59,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:59,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:59,358 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) [2022-07-20 21:15:59,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 21:16:00,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-20 21:16:00,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 21:16:00,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:01,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:01,525 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 493 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:01,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367474357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:01,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:01,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 35] total 53 [2022-07-20 21:16:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391363349] [2022-07-20 21:16:01,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:01,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 21:16:01,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 21:16:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1072, Invalid=1684, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 21:16:01,527 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 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) [2022-07-20 21:16:01,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:01,993 INFO L93 Difference]: Finished difference Result 217 states and 224 transitions. [2022-07-20 21:16:01,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 21:16:01,994 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 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 128 [2022-07-20 21:16:01,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:01,994 INFO L225 Difference]: With dead ends: 217 [2022-07-20 21:16:01,995 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 21:16:01,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1829, Invalid=3141, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 21:16:01,996 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:01,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 188 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:16:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 21:16:02,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 133. [2022-07-20 21:16:02,014 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) [2022-07-20 21:16:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-07-20 21:16:02,014 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2022-07-20 21:16:02,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:02,014 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-07-20 21:16:02,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.830188679245283) internal successors, (256), 53 states have internal predecessors, (256), 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) [2022-07-20 21:16:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-07-20 21:16:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-20 21:16:02,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:02,015 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:02,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:02,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:02,235 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:02,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:02,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 28 times [2022-07-20 21:16:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:02,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675296862] [2022-07-20 21:16:02,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 83 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675296862] [2022-07-20 21:16:03,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675296862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793087019] [2022-07-20 21:16:03,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:16:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:03,465 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) [2022-07-20 21:16:03,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 21:16:03,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:16:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:03,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-20 21:16:03,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:03,657 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 [2022-07-20 21:16:03,673 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,673 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 [2022-07-20 21:16:03,685 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,685 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 [2022-07-20 21:16:03,702 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,702 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 [2022-07-20 21:16:03,715 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,716 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 [2022-07-20 21:16:03,733 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,733 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 31 treesize of output 30 [2022-07-20 21:16:03,745 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,745 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 [2022-07-20 21:16:03,761 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,761 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 31 treesize of output 30 [2022-07-20 21:16:03,772 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,772 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 [2022-07-20 21:16:03,788 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,789 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 [2022-07-20 21:16:03,799 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,799 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 [2022-07-20 21:16:03,816 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,816 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 [2022-07-20 21:16:03,826 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,826 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 [2022-07-20 21:16:03,844 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,844 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 [2022-07-20 21:16:03,855 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,855 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 [2022-07-20 21:16:03,871 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,872 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 [2022-07-20 21:16:03,882 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,882 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 [2022-07-20 21:16:03,899 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,899 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 [2022-07-20 21:16:03,910 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:03,927 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:03,937 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,938 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 [2022-07-20 21:16:03,954 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,954 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 [2022-07-20 21:16:03,965 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:03,982 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:03,982 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 [2022-07-20 21:16:03,992 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:03,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:04,009 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:04,009 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 [2022-07-20 21:16:04,028 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:04,029 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 [2022-07-20 21:16:04,045 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:04,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:16:04,056 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:04,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:16:04,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 21:16:04,894 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 [2022-07-20 21:16:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 46 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:04,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:06,979 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 24 treesize of output 22 [2022-07-20 21:16:06,981 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 86 treesize of output 82 [2022-07-20 21:16:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 90 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:06,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793087019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:06,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:06,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 90 [2022-07-20 21:16:06,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299452089] [2022-07-20 21:16:06,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:06,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-20 21:16:06,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-20 21:16:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=6990, Unknown=0, NotChecked=0, Total=8010 [2022-07-20 21:16:06,988 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 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) [2022-07-20 21:16:09,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:09,771 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2022-07-20 21:16:09,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-20 21:16:09,772 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 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 132 [2022-07-20 21:16:09,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:09,772 INFO L225 Difference]: With dead ends: 152 [2022-07-20 21:16:09,772 INFO L226 Difference]: Without dead ends: 150 [2022-07-20 21:16:09,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 243 SyntacticMatches, 30 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8388 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3813, Invalid=17357, Unknown=0, NotChecked=0, Total=21170 [2022-07-20 21:16:09,774 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 688 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 917 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:09,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1070 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 1976 Invalid, 0 Unknown, 917 Unchecked, 0.9s Time] [2022-07-20 21:16:09,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-20 21:16:09,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2022-07-20 21:16:09,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 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) [2022-07-20 21:16:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-07-20 21:16:09,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 132 [2022-07-20 21:16:09,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:09,795 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-07-20 21:16:09,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.166666666666667) internal successors, (375), 90 states have internal predecessors, (375), 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) [2022-07-20 21:16:09,796 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-07-20 21:16:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-20 21:16:09,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:09,796 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:09,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:10,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:10,012 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:10,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1812265441, now seen corresponding path program 29 times [2022-07-20 21:16:10,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:10,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905284898] [2022-07-20 21:16:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:10,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 451 proven. 557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:10,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:10,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905284898] [2022-07-20 21:16:10,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905284898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:10,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245574144] [2022-07-20 21:16:10,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:16:10,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:10,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:10,244 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) [2022-07-20 21:16:10,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 21:16:11,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-20 21:16:11,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 21:16:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:11,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 558 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:12,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245574144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:12,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:12,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 36, 36] total 54 [2022-07-20 21:16:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687295334] [2022-07-20 21:16:12,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:12,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-20 21:16:12,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-20 21:16:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1126, Invalid=1736, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:16:12,340 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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) [2022-07-20 21:16:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:12,575 INFO L93 Difference]: Finished difference Result 234 states and 239 transitions. [2022-07-20 21:16:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-20 21:16:12,576 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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 136 [2022-07-20 21:16:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:12,576 INFO L225 Difference]: With dead ends: 234 [2022-07-20 21:16:12,576 INFO L226 Difference]: Without dead ends: 148 [2022-07-20 21:16:12,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1164, Invalid=1806, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 21:16:12,577 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 127 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:12,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 214 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:16:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-20 21:16:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-07-20 21:16:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 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) [2022-07-20 21:16:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-07-20 21:16:12,598 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 136 [2022-07-20 21:16:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:12,598 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-07-20 21:16:12,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.0) internal successors, (270), 54 states have internal predecessors, (270), 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) [2022-07-20 21:16:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-07-20 21:16:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-20 21:16:12,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:12,599 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:12,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:12,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:12,807 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:12,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 30 times [2022-07-20 21:16:12,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:12,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930168282] [2022-07-20 21:16:12,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:12,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 49 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930168282] [2022-07-20 21:16:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930168282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452282143] [2022-07-20 21:16:13,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:16:13,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:13,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:13,436 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:13,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 21:16:16,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-20 21:16:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 137 conjunts are in the unsatisfiable core [2022-07-20 21:16:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:16,812 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 [2022-07-20 21:16:16,824 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:16,832 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,832 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 [2022-07-20 21:16:16,842 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,842 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 [2022-07-20 21:16:16,850 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,851 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 30 treesize of output 29 [2022-07-20 21:16:16,862 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:16,870 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,870 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 [2022-07-20 21:16:16,880 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,881 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 [2022-07-20 21:16:16,889 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:16,899 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,899 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 [2022-07-20 21:16:16,911 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,911 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 [2022-07-20 21:16:16,922 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,922 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 [2022-07-20 21:16:16,929 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:16,939 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,939 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 [2022-07-20 21:16:16,947 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,947 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 [2022-07-20 21:16:16,957 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,957 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 [2022-07-20 21:16:16,965 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:16,975 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,975 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 [2022-07-20 21:16:16,983 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:16,983 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 [2022-07-20 21:16:16,992 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:16,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:17,000 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,000 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 [2022-07-20 21:16:17,010 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:17,010 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 [2022-07-20 21:16:17,017 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,018 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 [2022-07-20 21:16:17,027 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:17,028 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 [2022-07-20 21:16:17,036 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,036 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 [2022-07-20 21:16:17,046 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:17,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:16:17,054 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,054 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 [2022-07-20 21:16:17,065 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:17,065 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 [2022-07-20 21:16:17,073 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,073 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 [2022-07-20 21:16:17,083 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:17,083 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 [2022-07-20 21:16:17,091 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:17,091 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 [2022-07-20 21:16:17,158 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-07-20 21:16:17,158 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 21 treesize of output 20 [2022-07-20 21:16:17,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 49 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:17,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 96 proven. 977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:19,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452282143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:19,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:19,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 39, 40] total 61 [2022-07-20 21:16:19,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739579913] [2022-07-20 21:16:19,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:19,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-20 21:16:19,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-20 21:16:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=3085, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:16:19,476 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 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) [2022-07-20 21:16:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:23,109 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-07-20 21:16:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-20 21:16:23,110 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 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 140 [2022-07-20 21:16:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:23,117 INFO L225 Difference]: With dead ends: 162 [2022-07-20 21:16:23,117 INFO L226 Difference]: Without dead ends: 160 [2022-07-20 21:16:23,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 270 SyntacticMatches, 34 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5883 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3447, Invalid=15185, Unknown=0, NotChecked=0, Total=18632 [2022-07-20 21:16:23,118 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 400 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:23,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 928 Invalid, 2599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 21:16:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-20 21:16:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2022-07-20 21:16:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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) [2022-07-20 21:16:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-07-20 21:16:23,140 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 140 [2022-07-20 21:16:23,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-07-20 21:16:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.573770491803279) internal successors, (279), 61 states have internal predecessors, (279), 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) [2022-07-20 21:16:23,140 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-07-20 21:16:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 21:16:23,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:23,141 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:23,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:23,355 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,SelfDestructingSolverStorable33 [2022-07-20 21:16:23,355 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 31 times [2022-07-20 21:16:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:23,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842295139] [2022-07-20 21:16:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:23,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:23,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842295139] [2022-07-20 21:16:23,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842295139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066986436] [2022-07-20 21:16:23,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:16:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:23,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:23,552 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) [2022-07-20 21:16:23,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 21:16:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:23,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:16:23,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:24,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 627 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:24,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066986436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:24,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:24,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38, 38] total 57 [2022-07-20 21:16:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117851248] [2022-07-20 21:16:24,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:24,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 21:16:24,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:24,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 21:16:24,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1255, Invalid=1937, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 21:16:24,509 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 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) [2022-07-20 21:16:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:24,718 INFO L93 Difference]: Finished difference Result 246 states and 251 transitions. [2022-07-20 21:16:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 21:16:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 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 144 [2022-07-20 21:16:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:24,719 INFO L225 Difference]: With dead ends: 246 [2022-07-20 21:16:24,719 INFO L226 Difference]: Without dead ends: 156 [2022-07-20 21:16:24,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1295, Invalid=2011, Unknown=0, NotChecked=0, Total=3306 [2022-07-20 21:16:24,720 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 63 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:24,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 222 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:16:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-20 21:16:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2022-07-20 21:16:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 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) [2022-07-20 21:16:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-07-20 21:16:24,742 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 144 [2022-07-20 21:16:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:24,742 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-07-20 21:16:24,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.017543859649122) internal successors, (286), 57 states have internal predecessors, (286), 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) [2022-07-20 21:16:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-07-20 21:16:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-20 21:16:24,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:24,743 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:24,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:24,950 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 32 times [2022-07-20 21:16:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668711110] [2022-07-20 21:16:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 52 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:25,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668711110] [2022-07-20 21:16:25,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668711110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:25,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394117230] [2022-07-20 21:16:25,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:16:25,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:25,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:25,562 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) [2022-07-20 21:16:25,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 21:16:25,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:16:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:25,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 147 conjunts are in the unsatisfiable core [2022-07-20 21:16:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:25,828 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 [2022-07-20 21:16:25,871 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:25,871 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 31 treesize of output 30 [2022-07-20 21:16:25,909 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:25,909 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 [2022-07-20 21:16:25,936 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:25,936 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 [2022-07-20 21:16:25,943 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:25,943 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 [2022-07-20 21:16:25,972 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:25,972 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 [2022-07-20 21:16:25,981 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:25,981 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 30 treesize of output 29 [2022-07-20 21:16:26,009 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,009 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 [2022-07-20 21:16:26,016 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,016 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 [2022-07-20 21:16:26,044 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,044 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 [2022-07-20 21:16:26,051 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,051 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 [2022-07-20 21:16:26,082 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:26,089 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,089 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 [2022-07-20 21:16:26,119 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,119 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 [2022-07-20 21:16:26,129 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,130 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 [2022-07-20 21:16:26,159 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,159 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 [2022-07-20 21:16:26,167 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,168 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 [2022-07-20 21:16:26,199 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,199 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 [2022-07-20 21:16:26,208 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,208 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 [2022-07-20 21:16:26,269 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,269 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 [2022-07-20 21:16:26,279 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,279 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 [2022-07-20 21:16:26,322 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,322 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 [2022-07-20 21:16:26,332 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,332 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 [2022-07-20 21:16:26,375 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,375 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 [2022-07-20 21:16:26,384 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,384 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 [2022-07-20 21:16:26,427 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,428 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 [2022-07-20 21:16:26,437 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,437 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 [2022-07-20 21:16:26,481 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,481 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 [2022-07-20 21:16:26,490 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,490 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 [2022-07-20 21:16:26,533 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,534 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 [2022-07-20 21:16:26,544 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,544 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 [2022-07-20 21:16:26,588 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:26,588 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 31 treesize of output 30 [2022-07-20 21:16:26,597 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:26,597 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 [2022-07-20 21:16:26,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:16:26,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:27,875 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 [2022-07-20 21:16:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 52 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:27,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:30,396 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 [2022-07-20 21:16:30,398 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 [2022-07-20 21:16:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 102 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:30,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394117230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:30,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:30,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 42, 42] total 84 [2022-07-20 21:16:30,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425941034] [2022-07-20 21:16:30,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:30,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-20 21:16:30,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:30,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-20 21:16:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=6173, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 21:16:30,406 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 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) [2022-07-20 21:16:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:34,974 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-20 21:16:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-20 21:16:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 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 148 [2022-07-20 21:16:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:34,976 INFO L225 Difference]: With dead ends: 170 [2022-07-20 21:16:34,976 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 21:16:34,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 282 SyntacticMatches, 38 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9662 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=4721, Invalid=22339, Unknown=0, NotChecked=0, Total=27060 [2022-07-20 21:16:34,977 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 940 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 781 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 940 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 4171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 781 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:34,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [940 Valid, 1330 Invalid, 4171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [781 Valid, 3351 Invalid, 0 Unknown, 39 Unchecked, 1.4s Time] [2022-07-20 21:16:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 21:16:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 153. [2022-07-20 21:16:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 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) [2022-07-20 21:16:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-07-20 21:16:35,015 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 148 [2022-07-20 21:16:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:35,015 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-07-20 21:16:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.369047619047619) internal successors, (367), 84 states have internal predecessors, (367), 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) [2022-07-20 21:16:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-07-20 21:16:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 21:16:35,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:35,016 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:35,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:35,232 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:35,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1636847677, now seen corresponding path program 33 times [2022-07-20 21:16:35,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510913553] [2022-07-20 21:16:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 579 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:35,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510913553] [2022-07-20 21:16:35,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510913553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:35,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097966588] [2022-07-20 21:16:35,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:16:35,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:35,435 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) [2022-07-20 21:16:35,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 21:16:43,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-20 21:16:43,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:43,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 21:16:43,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:44,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 700 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:44,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097966588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:44,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:44,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 40, 40] total 60 [2022-07-20 21:16:44,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743887186] [2022-07-20 21:16:44,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:44,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-20 21:16:44,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-20 21:16:44,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=2149, Unknown=0, NotChecked=0, Total=3540 [2022-07-20 21:16:44,538 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 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) [2022-07-20 21:16:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:44,736 INFO L93 Difference]: Finished difference Result 258 states and 263 transitions. [2022-07-20 21:16:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 21:16:44,736 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 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 152 [2022-07-20 21:16:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:44,737 INFO L225 Difference]: With dead ends: 258 [2022-07-20 21:16:44,737 INFO L226 Difference]: Without dead ends: 164 [2022-07-20 21:16:44,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 282 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1433, Invalid=2227, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 21:16:44,738 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:44,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 252 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:16:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-20 21:16:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 157. [2022-07-20 21:16:44,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 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) [2022-07-20 21:16:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-07-20 21:16:44,762 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 152 [2022-07-20 21:16:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:44,762 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-07-20 21:16:44,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.033333333333333) internal successors, (302), 60 states have internal predecessors, (302), 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) [2022-07-20 21:16:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-07-20 21:16:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 21:16:44,763 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:44,763 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:44,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:44,986 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,SelfDestructingSolverStorable36 [2022-07-20 21:16:44,987 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:44,987 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 34 times [2022-07-20 21:16:44,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:44,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560568147] [2022-07-20 21:16:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:44,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 55 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:45,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560568147] [2022-07-20 21:16:45,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560568147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:45,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600578624] [2022-07-20 21:16:45,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:16:45,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:45,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:45,768 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) [2022-07-20 21:16:45,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 21:16:46,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:16:46,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 155 conjunts are in the unsatisfiable core [2022-07-20 21:16:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:46,194 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 [2022-07-20 21:16:46,256 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,256 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 [2022-07-20 21:16:46,266 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,266 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 [2022-07-20 21:16:46,311 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,311 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 [2022-07-20 21:16:46,322 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,323 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 [2022-07-20 21:16:46,358 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,359 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 [2022-07-20 21:16:46,366 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,367 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 [2022-07-20 21:16:46,404 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,404 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 [2022-07-20 21:16:46,413 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,414 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 [2022-07-20 21:16:46,450 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,450 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 [2022-07-20 21:16:46,477 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,477 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 [2022-07-20 21:16:46,516 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,517 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 [2022-07-20 21:16:46,526 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,526 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 [2022-07-20 21:16:46,565 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,565 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 [2022-07-20 21:16:46,576 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,576 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 [2022-07-20 21:16:46,616 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:16:46,625 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,626 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 [2022-07-20 21:16:46,690 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,691 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 [2022-07-20 21:16:46,700 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,700 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 [2022-07-20 21:16:46,752 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,753 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 [2022-07-20 21:16:46,763 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,763 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 [2022-07-20 21:16:46,807 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,807 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 [2022-07-20 21:16:46,817 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,817 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 [2022-07-20 21:16:46,861 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,861 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 [2022-07-20 21:16:46,871 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,871 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 30 treesize of output 29 [2022-07-20 21:16:46,916 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,916 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 [2022-07-20 21:16:46,925 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,925 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 [2022-07-20 21:16:46,970 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:46,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:16:46,980 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:46,980 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 [2022-07-20 21:16:47,036 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:47,036 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 [2022-07-20 21:16:47,045 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:47,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:47,090 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:47,090 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 [2022-07-20 21:16:47,100 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:47,100 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 [2022-07-20 21:16:47,145 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:16:47,146 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 [2022-07-20 21:16:47,155 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:16:47,155 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 [2022-07-20 21:16:47,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:16:47,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:16:48,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 55 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:48,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:51,140 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 [2022-07-20 21:16:51,142 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 [2022-07-20 21:16:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 108 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600578624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:51,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:51,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 44, 44] total 90 [2022-07-20 21:16:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869712020] [2022-07-20 21:16:51,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:51,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-20 21:16:51,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-20 21:16:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=7122, Unknown=0, NotChecked=0, Total=8010 [2022-07-20 21:16:51,151 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 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) [2022-07-20 21:16:56,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:56,697 INFO L93 Difference]: Finished difference Result 179 states and 181 transitions. [2022-07-20 21:16:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-20 21:16:56,698 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 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 156 [2022-07-20 21:16:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:56,698 INFO L225 Difference]: With dead ends: 179 [2022-07-20 21:16:56,698 INFO L226 Difference]: Without dead ends: 177 [2022-07-20 21:16:56,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 296 SyntacticMatches, 39 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10260 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5006, Invalid=24406, Unknown=0, NotChecked=0, Total=29412 [2022-07-20 21:16:56,700 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 402 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 3736 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 4151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 3736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:56,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 1537 Invalid, 4151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 3736 Invalid, 0 Unknown, 87 Unchecked, 1.5s Time] [2022-07-20 21:16:56,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-20 21:16:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2022-07-20 21:16:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 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) [2022-07-20 21:16:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-07-20 21:16:56,724 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2022-07-20 21:16:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:56,725 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-07-20 21:16:56,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.3) internal successors, (387), 90 states have internal predecessors, (387), 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) [2022-07-20 21:16:56,725 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-07-20 21:16:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-20 21:16:56,725 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:56,726 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:56,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:56,943 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,SelfDestructingSolverStorable37 [2022-07-20 21:16:56,944 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 35 times [2022-07-20 21:16:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287654772] [2022-07-20 21:16:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:56,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:57,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287654772] [2022-07-20 21:16:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287654772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:57,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38979413] [2022-07-20 21:16:57,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:16:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:57,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:57,188 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) [2022-07-20 21:16:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 21:16:59,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-20 21:16:59,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 21:16:59,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:59,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 777 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:00,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38979413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:00,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:00,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 42, 42] total 63 [2022-07-20 21:17:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964779087] [2022-07-20 21:17:00,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:00,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 21:17:00,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 21:17:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1534, Invalid=2372, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 21:17:00,218 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 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) [2022-07-20 21:17:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:17:00,536 INFO L93 Difference]: Finished difference Result 270 states and 275 transitions. [2022-07-20 21:17:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 21:17:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 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 160 [2022-07-20 21:17:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:17:00,537 INFO L225 Difference]: With dead ends: 270 [2022-07-20 21:17:00,538 INFO L226 Difference]: Without dead ends: 172 [2022-07-20 21:17:00,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1578, Invalid=2454, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 21:17:00,538 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 60 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:17:00,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 248 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:17:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-20 21:17:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 165. [2022-07-20 21:17:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 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) [2022-07-20 21:17:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-07-20 21:17:00,565 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 160 [2022-07-20 21:17:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:17:00,565 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-07-20 21:17:00,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.0476190476190474) internal successors, (318), 63 states have internal predecessors, (318), 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) [2022-07-20 21:17:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-07-20 21:17:00,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-20 21:17:00,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:17:00,566 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:17:00,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 21:17:00,785 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,SelfDestructingSolverStorable38 [2022-07-20 21:17:00,785 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:17:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:17:00,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 36 times [2022-07-20 21:17:00,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:17:00,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455571884] [2022-07-20 21:17:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:17:00,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:17:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:17:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 58 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:01,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:17:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455571884] [2022-07-20 21:17:01,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455571884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:17:01,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715040761] [2022-07-20 21:17:01,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:17:01,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:17:01,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:17:01,426 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) [2022-07-20 21:17:01,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 21:17:09,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-20 21:17:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:17:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 164 conjunts are in the unsatisfiable core [2022-07-20 21:17:09,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:17:09,168 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 [2022-07-20 21:17:09,233 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,234 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 [2022-07-20 21:17:09,244 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,245 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 [2022-07-20 21:17:09,289 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,289 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 [2022-07-20 21:17:09,300 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:17:09,343 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,343 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 [2022-07-20 21:17:09,354 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,354 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 [2022-07-20 21:17:09,397 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:17:09,408 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,408 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 [2022-07-20 21:17:09,453 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,453 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 [2022-07-20 21:17:09,464 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,464 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 [2022-07-20 21:17:09,512 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,512 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 [2022-07-20 21:17:09,526 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,526 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 [2022-07-20 21:17:09,572 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,573 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:17:09,584 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,584 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 [2022-07-20 21:17:09,630 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,630 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 [2022-07-20 21:17:09,644 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,644 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 [2022-07-20 21:17:09,690 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,690 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 [2022-07-20 21:17:09,702 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,703 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 [2022-07-20 21:17:09,750 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,750 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 [2022-07-20 21:17:09,761 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,761 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 30 treesize of output 29 [2022-07-20 21:17:09,836 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,837 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 [2022-07-20 21:17:09,844 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,844 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 [2022-07-20 21:17:09,877 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,877 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 [2022-07-20 21:17:09,902 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,902 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 [2022-07-20 21:17:09,949 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:09,949 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 [2022-07-20 21:17:09,960 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:09,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:17:10,008 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:10,008 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 [2022-07-20 21:17:10,018 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,019 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 30 treesize of output 29 [2022-07-20 21:17:10,067 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:10,067 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 [2022-07-20 21:17:10,079 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,079 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 [2022-07-20 21:17:10,126 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:10,127 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 31 treesize of output 30 [2022-07-20 21:17:10,138 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,139 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 [2022-07-20 21:17:10,187 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:10,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:17:10,198 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,198 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 [2022-07-20 21:17:10,249 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:17:10,249 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 [2022-07-20 21:17:10,259 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,260 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 [2022-07-20 21:17:10,392 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:17:10,392 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 [2022-07-20 21:17:12,021 INFO L356 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2022-07-20 21:17:12,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 15 [2022-07-20 21:17:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:12,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:16,514 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 24 treesize of output 22 [2022-07-20 21:17:16,520 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 192 treesize of output 184 [2022-07-20 21:17:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 114 proven. 1388 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:17:16,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715040761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:16,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47, 46] total 115 [2022-07-20 21:17:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756635140] [2022-07-20 21:17:16,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:16,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-07-20 21:17:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-07-20 21:17:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1780, Invalid=11330, Unknown=0, NotChecked=0, Total=13110 [2022-07-20 21:17:16,531 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 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) [2022-07-20 21:18:41,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:41,139 INFO L93 Difference]: Finished difference Result 1024 states and 1154 transitions. [2022-07-20 21:18:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 698 states. [2022-07-20 21:18:41,140 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 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 164 [2022-07-20 21:18:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:41,143 INFO L225 Difference]: With dead ends: 1024 [2022-07-20 21:18:41,143 INFO L226 Difference]: Without dead ends: 1022 [2022-07-20 21:18:41,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1207 GetRequests, 424 SyntacticMatches, 37 SemanticMatches, 746 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228725 ImplicationChecksByTransitivity, 86.2s TimeCoverageRelationStatistics Valid=40950, Invalid=517806, Unknown=0, NotChecked=0, Total=558756 [2022-07-20 21:18:41,177 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3898 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 2086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3898 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 10415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2086 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6025 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:41,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3898 Valid, 2645 Invalid, 10415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2086 Valid, 2304 Invalid, 0 Unknown, 6025 Unchecked, 2.6s Time] [2022-07-20 21:18:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-07-20 21:18:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 258. [2022-07-20 21:18:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.0194552529182879) internal successors, (262), 257 states have internal predecessors, (262), 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) [2022-07-20 21:18:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2022-07-20 21:18:41,231 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 164 [2022-07-20 21:18:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2022-07-20 21:18:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 4.191304347826087) internal successors, (482), 115 states have internal predecessors, (482), 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) [2022-07-20 21:18:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2022-07-20 21:18:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-20 21:18:41,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:41,232 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:41,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 21:18:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 21:18:41,452 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:41,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1626770528, now seen corresponding path program 37 times [2022-07-20 21:18:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039880422] [2022-07-20 21:18:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:41,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 61 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:42,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039880422] [2022-07-20 21:18:42,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039880422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:42,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890480856] [2022-07-20 21:18:42,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:18:42,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:42,323 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) [2022-07-20 21:18:42,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 21:18:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 171 conjunts are in the unsatisfiable core [2022-07-20 21:18:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:42,642 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 [2022-07-20 21:18:42,706 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,707 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 [2022-07-20 21:18:42,718 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,718 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 [2022-07-20 21:18:42,766 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,767 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 [2022-07-20 21:18:42,778 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,779 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 [2022-07-20 21:18:42,820 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,820 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 [2022-07-20 21:18:42,829 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:18:42,870 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,870 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 [2022-07-20 21:18:42,879 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,879 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 [2022-07-20 21:18:42,921 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:18:42,929 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,929 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 [2022-07-20 21:18:42,972 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:42,972 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 [2022-07-20 21:18:42,981 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:42,982 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 [2022-07-20 21:18:43,024 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,024 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 [2022-07-20 21:18:43,033 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,034 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 [2022-07-20 21:18:43,077 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2022-07-20 21:18:43,085 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,086 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 [2022-07-20 21:18:43,134 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-20 21:18:43,143 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,144 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 [2022-07-20 21:18:43,188 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,188 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 [2022-07-20 21:18:43,197 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,198 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 [2022-07-20 21:18:43,245 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,246 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 [2022-07-20 21:18:43,256 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,256 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 [2022-07-20 21:18:43,306 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,306 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 [2022-07-20 21:18:43,318 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,318 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 30 treesize of output 29 [2022-07-20 21:18:43,364 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,364 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 [2022-07-20 21:18:43,374 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,374 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 [2022-07-20 21:18:43,419 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,419 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 [2022-07-20 21:18:43,429 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:18:43,479 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,479 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 [2022-07-20 21:18:43,491 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,491 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 [2022-07-20 21:18:43,543 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,544 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 [2022-07-20 21:18:43,553 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,553 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 [2022-07-20 21:18:43,602 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,602 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 [2022-07-20 21:18:43,611 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,611 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 [2022-07-20 21:18:43,660 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,661 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 [2022-07-20 21:18:43,671 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,671 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 [2022-07-20 21:18:43,721 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-20 21:18:43,721 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 [2022-07-20 21:18:43,732 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-20 21:18:43,733 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 30 treesize of output 29 [2022-07-20 21:18:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:18:43,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-20 21:18:45,240 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 [2022-07-20 21:18:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 61 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:45,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:47,829 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 [2022-07-20 21:18:47,831 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 [2022-07-20 21:18:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 120 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:47,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890480856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:47,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:47,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 48, 48] total 97 [2022-07-20 21:18:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384761071] [2022-07-20 21:18:47,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-20 21:18:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-20 21:18:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=8298, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 21:18:47,839 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand has 97 states, 97 states have (on average 4.402061855670103) internal successors, (427), 97 states have internal predecessors, (427), 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)