./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label56.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label56.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 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:23:11,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:23:11,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:23:11,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:23:11,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:23:11,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:23:11,763 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:23:11,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:23:11,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:23:11,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:23:11,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:23:11,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:23:11,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:23:11,768 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:23:11,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:23:11,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:23:11,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:23:11,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:23:11,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:23:11,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:23:11,773 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:23:11,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:23:11,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:23:11,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:23:11,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:23:11,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:23:11,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:23:11,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:23:11,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:23:11,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:23:11,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:23:11,779 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:23:11,780 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:23:11,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:23:11,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:23:11,782 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:23:11,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:23:11,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:23:11,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:23:11,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:23:11,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:23:11,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:23:11,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:23:11,797 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:23:11,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:23:11,798 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:23:11,798 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:23:11,799 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:23:11,799 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:23:11,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:23:11,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:23:11,799 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:23:11,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:23:11,800 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:23:11,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:23:11,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:23:11,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:23:11,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:23:11,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:23:11,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:23:11,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:23:11,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:23:11,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:23:11,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:23:11,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:23:11,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:23:11,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21992ce5086310b9eccd33893912bc55e4a94502535426b80db5bcf53a1c73cc [2022-07-19 12:23:11,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:23:11,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:23:11,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:23:11,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:23:11,967 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:23:11,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2022-07-19 12:23:12,007 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530924169/e669a3caeef14220b742b41c32211bdb/FLAG630d5ec43 [2022-07-19 12:23:12,564 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:23:12,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label56.c [2022-07-19 12:23:12,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530924169/e669a3caeef14220b742b41c32211bdb/FLAG630d5ec43 [2022-07-19 12:23:13,071 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530924169/e669a3caeef14220b742b41c32211bdb [2022-07-19 12:23:13,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:23:13,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:23:13,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:23:13,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:23:13,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:23:13,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:23:13" (1/1) ... [2022-07-19 12:23:13,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a6c33f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:13, skipping insertion in model container [2022-07-19 12:23:13,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:23:13" (1/1) ... [2022-07-19 12:23:13,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:23:13,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:23:13,418 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/eca-rers2012/Problem13_label56.c[7559,7572] [2022-07-19 12:23:14,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:23:14,128 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:23:14,153 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/eca-rers2012/Problem13_label56.c[7559,7572] [2022-07-19 12:23:14,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:23:14,501 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:23:14,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14 WrapperNode [2022-07-19 12:23:14,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:23:14,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:23:14,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:23:14,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:23:14,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:14,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:14,941 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:23:14,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:23:14,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:23:14,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:23:14,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:23:14,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:14,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,273 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:23:15,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:23:15,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:23:15,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:23:15,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (1/1) ... [2022-07-19 12:23:15,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:23:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:23:15,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:23:15,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:23:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:23:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:23:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:23:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:23:15,489 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:23:15,490 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:23:19,056 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:23:19,067 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:23:19,068 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:23:19,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:23:19 BoogieIcfgContainer [2022-07-19 12:23:19,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:23:19,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:23:19,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:23:19,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:23:19,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:23:13" (1/3) ... [2022-07-19 12:23:19,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47403d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:23:19, skipping insertion in model container [2022-07-19 12:23:19,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:23:14" (2/3) ... [2022-07-19 12:23:19,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47403d9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:23:19, skipping insertion in model container [2022-07-19 12:23:19,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:23:19" (3/3) ... [2022-07-19 12:23:19,075 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label56.c [2022-07-19 12:23:19,084 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:23:19,085 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:23:19,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:23:19,133 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@4bc3727a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@350dff36 [2022-07-19 12:23:19,133 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:23:19,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:19,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 12:23:19,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:19,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:19,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:19,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:19,151 INFO L85 PathProgramCache]: Analyzing trace with hash -92557335, now seen corresponding path program 1 times [2022-07-19 12:23:19,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:19,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816790938] [2022-07-19 12:23:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:19,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:23:19,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:19,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816790938] [2022-07-19 12:23:19,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816790938] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:19,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:19,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943587608] [2022-07-19 12:23:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:19,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:19,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:19,341 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:22,796 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2022-07-19 12:23:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:22,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2022-07-19 12:23:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:22,824 INFO L225 Difference]: With dead ends: 3035 [2022-07-19 12:23:22,825 INFO L226 Difference]: Without dead ends: 1873 [2022-07-19 12:23:22,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:22,838 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 852 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:22,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-19 12:23:22,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-19 12:23:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2022-07-19 12:23:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2022-07-19 12:23:22,937 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 53 [2022-07-19 12:23:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:22,938 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2022-07-19 12:23:22,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2022-07-19 12:23:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 12:23:22,945 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:22,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:23:22,945 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -864385219, now seen corresponding path program 1 times [2022-07-19 12:23:22,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780424848] [2022-07-19 12:23:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:22,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:23:23,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780424848] [2022-07-19 12:23:23,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780424848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:23,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:23,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:23,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688631923] [2022-07-19 12:23:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:23,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:23,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:23,115 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 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) [2022-07-19 12:23:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:26,002 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2022-07-19 12:23:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 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) Word has length 125 [2022-07-19 12:23:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:26,026 INFO L225 Difference]: With dead ends: 5317 [2022-07-19 12:23:26,026 INFO L226 Difference]: Without dead ends: 3460 [2022-07-19 12:23:26,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:26,033 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:26,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:23:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-19 12:23:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2022-07-19 12:23:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2022-07-19 12:23:26,080 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 125 [2022-07-19 12:23:26,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:26,082 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2022-07-19 12:23:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 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) [2022-07-19 12:23:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2022-07-19 12:23:26,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-19 12:23:26,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:26,089 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:26,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:23:26,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:26,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:26,090 INFO L85 PathProgramCache]: Analyzing trace with hash -799913370, now seen corresponding path program 1 times [2022-07-19 12:23:26,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:26,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668503002] [2022-07-19 12:23:26,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:26,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:23:26,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:26,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668503002] [2022-07-19 12:23:26,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668503002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:26,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:26,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:26,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672681279] [2022-07-19 12:23:26,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:26,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:23:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:23:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:26,255 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 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) [2022-07-19 12:23:30,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:30,361 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2022-07-19 12:23:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:23:30,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 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) Word has length 139 [2022-07-19 12:23:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:30,382 INFO L225 Difference]: With dead ends: 10870 [2022-07-19 12:23:30,382 INFO L226 Difference]: Without dead ends: 7413 [2022-07-19 12:23:30,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:23:30,395 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:30,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-07-19 12:23:30,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-07-19 12:23:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2022-07-19 12:23:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2022-07-19 12:23:30,585 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 139 [2022-07-19 12:23:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:30,587 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2022-07-19 12:23:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 3 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) [2022-07-19 12:23:30,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2022-07-19 12:23:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-07-19 12:23:30,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:30,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:23:30,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:30,598 INFO L85 PathProgramCache]: Analyzing trace with hash 813209171, now seen corresponding path program 1 times [2022-07-19 12:23:30,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:30,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655056781] [2022-07-19 12:23:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:30,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 12:23:30,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:30,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655056781] [2022-07-19 12:23:30,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655056781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:30,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:30,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:30,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054895182] [2022-07-19 12:23:30,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:30,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:30,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:30,788 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) [2022-07-19 12:23:33,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:33,840 INFO L93 Difference]: Finished difference Result 20357 states and 26252 transitions. [2022-07-19 12:23:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) Word has length 220 [2022-07-19 12:23:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:33,932 INFO L225 Difference]: With dead ends: 20357 [2022-07-19 12:23:33,932 INFO L226 Difference]: Without dead ends: 13734 [2022-07-19 12:23:33,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:33,963 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 889 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:33,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 980 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:23:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13734 states. [2022-07-19 12:23:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13734 to 12937. [2022-07-19 12:23:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2022-07-19 12:23:34,188 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 220 [2022-07-19 12:23:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:34,189 INFO L495 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2022-07-19 12:23:34,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 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) [2022-07-19 12:23:34,190 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2022-07-19 12:23:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-19 12:23:34,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:34,196 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:34,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:23:34,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1061989469, now seen corresponding path program 1 times [2022-07-19 12:23:34,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:34,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314254344] [2022-07-19 12:23:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:34,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:23:34,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:34,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314254344] [2022-07-19 12:23:34,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314254344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:34,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:34,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:34,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661201276] [2022-07-19 12:23:34,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:34,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:34,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:34,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:34,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:34,326 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:37,440 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2022-07-19 12:23:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2022-07-19 12:23:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:37,480 INFO L225 Difference]: With dead ends: 31392 [2022-07-19 12:23:37,480 INFO L226 Difference]: Without dead ends: 19244 [2022-07-19 12:23:37,493 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 [2022-07-19 12:23:37,494 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:37,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:23:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-07-19 12:23:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2022-07-19 12:23:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:37,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2022-07-19 12:23:37,677 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 252 [2022-07-19 12:23:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:37,678 INFO L495 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2022-07-19 12:23:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2022-07-19 12:23:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-07-19 12:23:37,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:37,687 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:37,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:23:37,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1794467894, now seen corresponding path program 1 times [2022-07-19 12:23:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:37,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55426899] [2022-07-19 12:23:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:37,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:23:37,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:37,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55426899] [2022-07-19 12:23:37,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55426899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:37,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:37,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776672788] [2022-07-19 12:23:37,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:37,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:37,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:37,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:37,827 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 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) [2022-07-19 12:23:41,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:41,550 INFO L93 Difference]: Finished difference Result 52772 states and 63784 transitions. [2022-07-19 12:23:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:41,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 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) Word has length 341 [2022-07-19 12:23:41,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:41,647 INFO L225 Difference]: With dead ends: 52772 [2022-07-19 12:23:41,648 INFO L226 Difference]: Without dead ends: 35114 [2022-07-19 12:23:41,659 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 [2022-07-19 12:23:41,660 INFO L413 NwaCegarLoop]: 1700 mSDtfsCounter, 920 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:41,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 1819 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-07-19 12:23:41,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35114 states. [2022-07-19 12:23:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35114 to 34274. [2022-07-19 12:23:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34274 states, 34273 states have (on average 1.1858897674554314) internal successors, (40644), 34273 states have internal predecessors, (40644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34274 states to 34274 states and 40644 transitions. [2022-07-19 12:23:41,971 INFO L78 Accepts]: Start accepts. Automaton has 34274 states and 40644 transitions. Word has length 341 [2022-07-19 12:23:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:41,972 INFO L495 AbstractCegarLoop]: Abstraction has 34274 states and 40644 transitions. [2022-07-19 12:23:41,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 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) [2022-07-19 12:23:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 34274 states and 40644 transitions. [2022-07-19 12:23:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-07-19 12:23:41,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:41,977 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:41,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:23:41,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash 965426254, now seen corresponding path program 1 times [2022-07-19 12:23:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:41,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280480042] [2022-07-19 12:23:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 377 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 12:23:42,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280480042] [2022-07-19 12:23:42,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280480042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:42,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:42,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:42,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313874723] [2022-07-19 12:23:42,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:23:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:42,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:23:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:42,083 INFO L87 Difference]: Start difference. First operand 34274 states and 40644 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:48,229 INFO L93 Difference]: Finished difference Result 108144 states and 129355 transitions. [2022-07-19 12:23:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:23:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 341 [2022-07-19 12:23:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:48,307 INFO L225 Difference]: With dead ends: 108144 [2022-07-19 12:23:48,308 INFO L226 Difference]: Without dead ends: 74659 [2022-07-19 12:23:48,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:23:48,332 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 1738 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 6123 mSolverCounterSat, 1148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1738 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 7271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1148 IncrementalHoareTripleChecker+Valid, 6123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:48,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1738 Valid, 798 Invalid, 7271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1148 Valid, 6123 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-19 12:23:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74659 states. [2022-07-19 12:23:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74659 to 74498. [2022-07-19 12:23:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74498 states, 74497 states have (on average 1.170892787629032) internal successors, (87228), 74497 states have internal predecessors, (87228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74498 states to 74498 states and 87228 transitions. [2022-07-19 12:23:49,035 INFO L78 Accepts]: Start accepts. Automaton has 74498 states and 87228 transitions. Word has length 341 [2022-07-19 12:23:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:49,036 INFO L495 AbstractCegarLoop]: Abstraction has 74498 states and 87228 transitions. [2022-07-19 12:23:49,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 74498 states and 87228 transitions. [2022-07-19 12:23:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-07-19 12:23:49,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:49,044 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:49,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:23:49,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:49,045 INFO L85 PathProgramCache]: Analyzing trace with hash -887572111, now seen corresponding path program 1 times [2022-07-19 12:23:49,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:49,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505613147] [2022-07-19 12:23:49,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:49,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-19 12:23:49,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:49,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505613147] [2022-07-19 12:23:49,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505613147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:49,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:49,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:23:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241639298] [2022-07-19 12:23:49,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:49,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:49,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:49,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:49,443 INFO L87 Difference]: Start difference. First operand 74498 states and 87228 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:52,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:52,815 INFO L93 Difference]: Finished difference Result 160036 states and 187018 transitions. [2022-07-19 12:23:52,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:52,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 379 [2022-07-19 12:23:52,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:52,913 INFO L225 Difference]: With dead ends: 160036 [2022-07-19 12:23:52,914 INFO L226 Difference]: Without dead ends: 86327 [2022-07-19 12:23:52,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:52,954 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 730 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:52,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1202 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:23:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86327 states. [2022-07-19 12:23:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86327 to 86316. [2022-07-19 12:23:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86316 states, 86315 states have (on average 1.1568904593639575) internal successors, (99857), 86315 states have internal predecessors, (99857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86316 states to 86316 states and 99857 transitions. [2022-07-19 12:23:54,060 INFO L78 Accepts]: Start accepts. Automaton has 86316 states and 99857 transitions. Word has length 379 [2022-07-19 12:23:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:54,060 INFO L495 AbstractCegarLoop]: Abstraction has 86316 states and 99857 transitions. [2022-07-19 12:23:54,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:54,061 INFO L276 IsEmpty]: Start isEmpty. Operand 86316 states and 99857 transitions. [2022-07-19 12:23:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-19 12:23:54,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:54,096 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:54,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:23:54,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:54,098 INFO L85 PathProgramCache]: Analyzing trace with hash -421298775, now seen corresponding path program 1 times [2022-07-19 12:23:54,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:54,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463443502] [2022-07-19 12:23:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:54,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 324 proven. 113 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 12:23:54,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463443502] [2022-07-19 12:23:54,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463443502] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:23:54,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533812747] [2022-07-19 12:23:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:54,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:54,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:23:54,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:23:54,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:23:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:54,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:23:54,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:23:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-07-19 12:23:54,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:23:54,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533812747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:54,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:23:54,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:23:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860825240] [2022-07-19 12:23:54,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:54,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:54,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:54,920 INFO L87 Difference]: Start difference. First operand 86316 states and 99857 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:23:57,680 INFO L93 Difference]: Finished difference Result 174967 states and 202960 transitions. [2022-07-19 12:23:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:23:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 408 [2022-07-19 12:23:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:23:57,812 INFO L225 Difference]: With dead ends: 174967 [2022-07-19 12:23:57,812 INFO L226 Difference]: Without dead ends: 101258 [2022-07-19 12:23:57,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:23:57,853 INFO L413 NwaCegarLoop]: 1726 mSDtfsCounter, 873 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2391 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 2855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:23:57,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 1856 Invalid, 2855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2391 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 12:23:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101258 states. [2022-07-19 12:23:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101258 to 91020. [2022-07-19 12:23:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91020 states, 91019 states have (on average 1.147705424142212) internal successors, (104463), 91019 states have internal predecessors, (104463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91020 states to 91020 states and 104463 transitions. [2022-07-19 12:23:59,036 INFO L78 Accepts]: Start accepts. Automaton has 91020 states and 104463 transitions. Word has length 408 [2022-07-19 12:23:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:23:59,036 INFO L495 AbstractCegarLoop]: Abstraction has 91020 states and 104463 transitions. [2022-07-19 12:23:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:23:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 91020 states and 104463 transitions. [2022-07-19 12:23:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-07-19 12:23:59,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:23:59,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:23:59,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 12:23:59,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:23:59,259 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:23:59,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:23:59,259 INFO L85 PathProgramCache]: Analyzing trace with hash -105529957, now seen corresponding path program 1 times [2022-07-19 12:23:59,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:23:59,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806882393] [2022-07-19 12:23:59,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:23:59,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:23:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:23:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-19 12:23:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:23:59,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806882393] [2022-07-19 12:23:59,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806882393] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:23:59,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:23:59,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:23:59,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426270943] [2022-07-19 12:23:59,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:23:59,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:23:59,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:23:59,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:23:59,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:23:59,686 INFO L87 Difference]: Start difference. First operand 91020 states and 104463 transitions. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:03,291 INFO L93 Difference]: Finished difference Result 210389 states and 244216 transitions. [2022-07-19 12:24:03,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:03,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 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 457 [2022-07-19 12:24:03,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:03,576 INFO L225 Difference]: With dead ends: 210389 [2022-07-19 12:24:03,577 INFO L226 Difference]: Without dead ends: 120158 [2022-07-19 12:24:03,626 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 [2022-07-19 12:24:03,627 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 939 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 932 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 3364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 932 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:03,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 946 Invalid, 3364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [932 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:24:03,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120158 states. [2022-07-19 12:24:04,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120158 to 117774. [2022-07-19 12:24:05,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117774 states, 117773 states have (on average 1.1534562251110188) internal successors, (135846), 117773 states have internal predecessors, (135846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117774 states to 117774 states and 135846 transitions. [2022-07-19 12:24:05,220 INFO L78 Accepts]: Start accepts. Automaton has 117774 states and 135846 transitions. Word has length 457 [2022-07-19 12:24:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:05,221 INFO L495 AbstractCegarLoop]: Abstraction has 117774 states and 135846 transitions. [2022-07-19 12:24:05,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 117774 states and 135846 transitions. [2022-07-19 12:24:05,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-07-19 12:24:05,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:05,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:05,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 12:24:05,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:05,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:05,231 INFO L85 PathProgramCache]: Analyzing trace with hash 251174794, now seen corresponding path program 1 times [2022-07-19 12:24:05,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:05,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780595252] [2022-07-19 12:24:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 339 proven. 113 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 12:24:05,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780595252] [2022-07-19 12:24:05,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780595252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:24:05,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021698167] [2022-07-19 12:24:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:05,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:24:05,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:24:05,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:24:05,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:24:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:05,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:24:05,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:24:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 503 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:24:06,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:24:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021698167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:06,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:24:06,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:24:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535873775] [2022-07-19 12:24:06,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:06,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:24:06,136 INFO L87 Difference]: Start difference. First operand 117774 states and 135846 transitions. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:09,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:09,664 INFO L93 Difference]: Finished difference Result 230789 states and 269473 transitions. [2022-07-19 12:24:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:09,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 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 483 [2022-07-19 12:24:09,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:09,831 INFO L225 Difference]: With dead ends: 230789 [2022-07-19 12:24:09,831 INFO L226 Difference]: Without dead ends: 129553 [2022-07-19 12:24:09,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:24:09,899 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1136 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 1138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1136 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1138 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:09,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1136 Valid, 410 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1138 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 12:24:10,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129553 states. [2022-07-19 12:24:11,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129553 to 129551. [2022-07-19 12:24:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129551 states, 129550 states have (on average 1.149733693554612) internal successors, (148948), 129550 states have internal predecessors, (148948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129551 states to 129551 states and 148948 transitions. [2022-07-19 12:24:11,608 INFO L78 Accepts]: Start accepts. Automaton has 129551 states and 148948 transitions. Word has length 483 [2022-07-19 12:24:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:11,623 INFO L495 AbstractCegarLoop]: Abstraction has 129551 states and 148948 transitions. [2022-07-19 12:24:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 129551 states and 148948 transitions. [2022-07-19 12:24:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-07-19 12:24:11,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:11,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:11,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:24:11,855 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,SelfDestructingSolverStorable10 [2022-07-19 12:24:11,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 846949728, now seen corresponding path program 1 times [2022-07-19 12:24:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:11,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665467822] [2022-07-19 12:24:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:11,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-19 12:24:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:11,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665467822] [2022-07-19 12:24:11,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665467822] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:11,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:24:11,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:24:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930406104] [2022-07-19 12:24:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:11,988 INFO L87 Difference]: Start difference. First operand 129551 states and 148948 transitions. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:15,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:15,339 INFO L93 Difference]: Finished difference Result 260678 states and 299490 transitions. [2022-07-19 12:24:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:15,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 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 498 [2022-07-19 12:24:15,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:15,533 INFO L225 Difference]: With dead ends: 260678 [2022-07-19 12:24:15,533 INFO L226 Difference]: Without dead ends: 131916 [2022-07-19 12:24:15,609 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 [2022-07-19 12:24:15,610 INFO L413 NwaCegarLoop]: 1367 mSDtfsCounter, 847 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2460 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 3080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:15,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 1453 Invalid, 3080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 2460 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:24:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131916 states. [2022-07-19 12:24:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131916 to 129536. [2022-07-19 12:24:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129536 states, 129535 states have (on average 1.1070984675956306) internal successors, (143408), 129535 states have internal predecessors, (143408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129536 states to 129536 states and 143408 transitions. [2022-07-19 12:24:17,346 INFO L78 Accepts]: Start accepts. Automaton has 129536 states and 143408 transitions. Word has length 498 [2022-07-19 12:24:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:17,346 INFO L495 AbstractCegarLoop]: Abstraction has 129536 states and 143408 transitions. [2022-07-19 12:24:17,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 129536 states and 143408 transitions. [2022-07-19 12:24:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-07-19 12:24:17,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:17,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:17,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:24:17,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1779071081, now seen corresponding path program 1 times [2022-07-19 12:24:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:17,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640506683] [2022-07-19 12:24:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-19 12:24:17,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:17,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640506683] [2022-07-19 12:24:17,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640506683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:17,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:24:17,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:24:17,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909770203] [2022-07-19 12:24:17,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:17,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:17,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:17,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:17,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:17,534 INFO L87 Difference]: Start difference. First operand 129536 states and 143408 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:21,098 INFO L93 Difference]: Finished difference Result 284266 states and 315680 transitions. [2022-07-19 12:24:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:21,099 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 501 [2022-07-19 12:24:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:21,317 INFO L225 Difference]: With dead ends: 284266 [2022-07-19 12:24:21,317 INFO L226 Difference]: Without dead ends: 153155 [2022-07-19 12:24:21,391 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 [2022-07-19 12:24:21,392 INFO L413 NwaCegarLoop]: 1723 mSDtfsCounter, 729 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2510 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 2510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:21,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1865 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 2510 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:24:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153155 states. [2022-07-19 12:24:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153155 to 150770. [2022-07-19 12:24:23,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150770 states, 150769 states have (on average 1.0947077980221398) internal successors, (165048), 150769 states have internal predecessors, (165048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150770 states to 150770 states and 165048 transitions. [2022-07-19 12:24:23,321 INFO L78 Accepts]: Start accepts. Automaton has 150770 states and 165048 transitions. Word has length 501 [2022-07-19 12:24:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 150770 states and 165048 transitions. [2022-07-19 12:24:23,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 150770 states and 165048 transitions. [2022-07-19 12:24:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-07-19 12:24:23,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:23,333 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 12:24:23,333 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:23,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1676570737, now seen corresponding path program 1 times [2022-07-19 12:24:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:23,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111012769] [2022-07-19 12:24:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1011 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-07-19 12:24:23,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111012769] [2022-07-19 12:24:23,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111012769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:23,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:24:23,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:24:23,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408424303] [2022-07-19 12:24:23,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:23,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:23,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:23,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:23,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:23,471 INFO L87 Difference]: Start difference. First operand 150770 states and 165048 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:26,835 INFO L93 Difference]: Finished difference Result 299175 states and 327354 transitions. [2022-07-19 12:24:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 538 [2022-07-19 12:24:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:27,032 INFO L225 Difference]: With dead ends: 299175 [2022-07-19 12:24:27,033 INFO L226 Difference]: Without dead ends: 149194 [2022-07-19 12:24:27,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:27,112 INFO L413 NwaCegarLoop]: 1332 mSDtfsCounter, 1031 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:27,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1409 Invalid, 2850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:24:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149194 states. [2022-07-19 12:24:28,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149194 to 149191. [2022-07-19 12:24:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149191 states, 149190 states have (on average 1.0696025202761579) internal successors, (159574), 149190 states have internal predecessors, (159574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149191 states to 149191 states and 159574 transitions. [2022-07-19 12:24:29,154 INFO L78 Accepts]: Start accepts. Automaton has 149191 states and 159574 transitions. Word has length 538 [2022-07-19 12:24:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:29,158 INFO L495 AbstractCegarLoop]: Abstraction has 149191 states and 159574 transitions. [2022-07-19 12:24:29,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 149191 states and 159574 transitions. [2022-07-19 12:24:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2022-07-19 12:24:29,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:29,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:29,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:24:29,180 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash -630986981, now seen corresponding path program 1 times [2022-07-19 12:24:29,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:29,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371876824] [2022-07-19 12:24:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:29,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 413 proven. 110 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 12:24:29,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:29,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371876824] [2022-07-19 12:24:29,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371876824] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:24:29,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032793847] [2022-07-19 12:24:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:24:29,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:24:29,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:24:29,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:24:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:24:29,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:24:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 399 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-19 12:24:30,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:24:30,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032793847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:30,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:24:30,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-19 12:24:30,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689770335] [2022-07-19 12:24:30,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:30,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:30,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:24:30,948 INFO L87 Difference]: Start difference. First operand 149191 states and 159574 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:33,882 INFO L93 Difference]: Finished difference Result 285007 states and 305409 transitions. [2022-07-19 12:24:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:33,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 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 614 [2022-07-19 12:24:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:34,062 INFO L225 Difference]: With dead ends: 285007 [2022-07-19 12:24:34,063 INFO L226 Difference]: Without dead ends: 152350 [2022-07-19 12:24:34,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:24:34,120 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:34,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1112 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2425 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-19 12:24:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152350 states. [2022-07-19 12:24:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152350 to 152341. [2022-07-19 12:24:35,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152341 states, 152340 states have (on average 1.0632072994617303) internal successors, (161969), 152340 states have internal predecessors, (161969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152341 states to 152341 states and 161969 transitions. [2022-07-19 12:24:36,149 INFO L78 Accepts]: Start accepts. Automaton has 152341 states and 161969 transitions. Word has length 614 [2022-07-19 12:24:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:36,150 INFO L495 AbstractCegarLoop]: Abstraction has 152341 states and 161969 transitions. [2022-07-19 12:24:36,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 152341 states and 161969 transitions. [2022-07-19 12:24:36,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 713 [2022-07-19 12:24:36,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:36,183 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:36,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:24:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:24:36,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1616764029, now seen corresponding path program 1 times [2022-07-19 12:24:36,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:36,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728630994] [2022-07-19 12:24:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:36,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:24:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 787 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-07-19 12:24:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:24:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728630994] [2022-07-19 12:24:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728630994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:24:36,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:24:36,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:24:36,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537021984] [2022-07-19 12:24:36,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:24:36,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:24:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:24:36,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:24:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:24:36,612 INFO L87 Difference]: Start difference. First operand 152341 states and 161969 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:24:39,818 INFO L93 Difference]: Finished difference Result 303083 states and 322141 transitions. [2022-07-19 12:24:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:24:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 712 [2022-07-19 12:24:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:24:40,022 INFO L225 Difference]: With dead ends: 303083 [2022-07-19 12:24:40,022 INFO L226 Difference]: Without dead ends: 148381 [2022-07-19 12:24:40,101 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 [2022-07-19 12:24:40,102 INFO L413 NwaCegarLoop]: 1424 mSDtfsCounter, 893 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2286 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 2805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:24:40,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [893 Valid, 1546 Invalid, 2805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2286 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-19 12:24:40,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148381 states. [2022-07-19 12:24:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148381 to 145223. [2022-07-19 12:24:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145223 states, 145222 states have (on average 1.0449931828510832) internal successors, (151756), 145222 states have internal predecessors, (151756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145223 states to 145223 states and 151756 transitions. [2022-07-19 12:24:42,066 INFO L78 Accepts]: Start accepts. Automaton has 145223 states and 151756 transitions. Word has length 712 [2022-07-19 12:24:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:24:42,067 INFO L495 AbstractCegarLoop]: Abstraction has 145223 states and 151756 transitions. [2022-07-19 12:24:42,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:24:42,067 INFO L276 IsEmpty]: Start isEmpty. Operand 145223 states and 151756 transitions. [2022-07-19 12:24:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-07-19 12:24:42,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:24:42,141 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:24:42,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:24:42,141 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:24:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:24:42,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1994662939, now seen corresponding path program 1 times [2022-07-19 12:24:42,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:24:42,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480295978] [2022-07-19 12:24:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:24:42,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:24:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat