./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label07.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_label07.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 c6eeba0e1c333b0671bbfcf3662adf7139859c1a965a716dd9b28c849af19818 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:35:55,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:35:55,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:35:55,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:35:55,633 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:35:55,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:35:55,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:35:55,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:35:55,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:35:55,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:35:55,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:35:55,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:35:55,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:35:55,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:35:55,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:35:55,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:35:55,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:35:55,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:35:55,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:35:55,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:35:55,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:35:55,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:35:55,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:35:55,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:35:55,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:35:55,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:35:55,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:35:55,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:35:55,669 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:35:55,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:35:55,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:35:55,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:35:55,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:35:55,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:35:55,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:35:55,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:35:55,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:35:55,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:35:55,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:35:55,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:35:55,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:35:55,676 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:35:55,700 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:35:55,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:35:55,701 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:35:55,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:35:55,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:35:55,702 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:35:55,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:35:55,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:35:55,703 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:35:55,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:35:55,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:35:55,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:35:55,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:55,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:35:55,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:35:55,707 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:35:55,707 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:35:55,707 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:35:55,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:35:55,707 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6eeba0e1c333b0671bbfcf3662adf7139859c1a965a716dd9b28c849af19818 [2021-12-17 04:35:55,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:35:55,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:35:55,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:35:55,926 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:35:55,926 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:35:55,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label07.c [2021-12-17 04:35:55,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37cb5a221/f2b907aeee36456bad4bf65ba6623c95/FLAG743919dce [2021-12-17 04:35:56,563 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:35:56,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label07.c [2021-12-17 04:35:56,597 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37cb5a221/f2b907aeee36456bad4bf65ba6623c95/FLAG743919dce [2021-12-17 04:35:57,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37cb5a221/f2b907aeee36456bad4bf65ba6623c95 [2021-12-17 04:35:57,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:35:57,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:35:57,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:57,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:35:57,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:35:57,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:57" (1/1) ... [2021-12-17 04:35:57,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132c1399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:57, skipping insertion in model container [2021-12-17 04:35:57,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:35:57" (1/1) ... [2021-12-17 04:35:57,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:35:57,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:35:57,303 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_label07.c[3249,3262] [2021-12-17 04:35:57,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:57,945 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:35:57,968 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_label07.c[3249,3262] [2021-12-17 04:35:58,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:35:58,328 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:35:58,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58 WrapperNode [2021-12-17 04:35:58,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:35:58,330 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:58,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:35:58,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:35:58,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:58,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:58,791 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:35:58,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:35:58,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:35:58,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:35:58,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:35:58,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:58,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:58,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:58,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:59,158 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:59,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:59,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:59,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:35:59,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:35:59,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:35:59,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:35:59,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (1/1) ... [2021-12-17 04:35:59,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:35:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:35:59,396 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) [2021-12-17 04:35:59,414 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 [2021-12-17 04:35:59,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:35:59,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:35:59,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:35:59,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:35:59,476 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:35:59,477 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:36:02,734 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:36:02,745 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:36:02,745 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:36:02,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:36:02 BoogieIcfgContainer [2021-12-17 04:36:02,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:36:02,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:36:02,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:36:02,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:36:02,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:35:57" (1/3) ... [2021-12-17 04:36:02,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a37430d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:36:02, skipping insertion in model container [2021-12-17 04:36:02,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:35:58" (2/3) ... [2021-12-17 04:36:02,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a37430d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:36:02, skipping insertion in model container [2021-12-17 04:36:02,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:36:02" (3/3) ... [2021-12-17 04:36:02,752 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label07.c [2021-12-17 04:36:02,755 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:36:02,755 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:36:02,786 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:36:02,790 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:36:02,791 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:36:02,810 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) [2021-12-17 04:36:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 04:36:02,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:02,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:02,814 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:02,817 INFO L85 PathProgramCache]: Analyzing trace with hash -85512855, now seen corresponding path program 1 times [2021-12-17 04:36:02,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:02,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329249877] [2021-12-17 04:36:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:02,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:02,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329249877] [2021-12-17 04:36:02,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329249877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:02,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:02,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:36:02,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012507229] [2021-12-17 04:36:02,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:02,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:02,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:02,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:02,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:02,962 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 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:06,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:06,353 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2021-12-17 04:36:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 04:36:06,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:06,376 INFO L225 Difference]: With dead ends: 3082 [2021-12-17 04:36:06,376 INFO L226 Difference]: Without dead ends: 1899 [2021-12-17 04:36:06,384 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:06,386 INFO L933 BasicCegarLoop]: 470 mSDtfsCounter, 1018 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:06,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 04:36:06,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-12-17 04:36:06,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2021-12-17 04:36:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2021-12-17 04:36:06,521 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 21 [2021-12-17 04:36:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:06,522 INFO L470 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2021-12-17 04:36:06,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2021-12-17 04:36:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 04:36:06,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:06,524 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 04:36:06,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:36:06,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:06,525 INFO L85 PathProgramCache]: Analyzing trace with hash -774471582, now seen corresponding path program 1 times [2021-12-17 04:36:06,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:06,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592604217] [2021-12-17 04:36:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:06,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:06,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592604217] [2021-12-17 04:36:06,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592604217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:06,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:06,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:06,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099966079] [2021-12-17 04:36:06,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:06,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:36:06,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:06,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:36:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:06,674 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:11,437 INFO L93 Difference]: Finished difference Result 6175 states and 10777 transitions. [2021-12-17 04:36:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:36:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-12-17 04:36:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:11,449 INFO L225 Difference]: With dead ends: 6175 [2021-12-17 04:36:11,449 INFO L226 Difference]: Without dead ends: 4283 [2021-12-17 04:36:11,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:36:11,455 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 2571 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4231 mSolverCounterSat, 1314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2571 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 4231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:11,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2571 Valid, 1099 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1314 Valid, 4231 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 04:36:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2021-12-17 04:36:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 4282. [2021-12-17 04:36:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4282 states, 4281 states have (on average 1.4879701004438215) internal successors, (6370), 4281 states have internal predecessors, (6370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4282 states to 4282 states and 6370 transitions. [2021-12-17 04:36:11,516 INFO L78 Accepts]: Start accepts. Automaton has 4282 states and 6370 transitions. Word has length 86 [2021-12-17 04:36:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:11,517 INFO L470 AbstractCegarLoop]: Abstraction has 4282 states and 6370 transitions. [2021-12-17 04:36:11,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4282 states and 6370 transitions. [2021-12-17 04:36:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 04:36:11,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:11,525 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 04:36:11,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:36:11,527 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2047768511, now seen corresponding path program 1 times [2021-12-17 04:36:11,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:11,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888097888] [2021-12-17 04:36:11,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:11,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:11,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:11,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888097888] [2021-12-17 04:36:11,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888097888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:36:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798063152] [2021-12-17 04:36:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:11,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:11,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:36:11,763 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) [2021-12-17 04:36:11,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:36:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:11,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:36:11,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:36:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-17 04:36:12,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:36:12,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798063152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:12,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:36:12,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:36:12,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609610954] [2021-12-17 04:36:12,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:12,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:12,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:36:12,119 INFO L87 Difference]: Start difference. First operand 4282 states and 6370 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:14,884 INFO L93 Difference]: Finished difference Result 10948 states and 17098 transitions. [2021-12-17 04:36:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:14,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 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 146 [2021-12-17 04:36:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:14,912 INFO L225 Difference]: With dead ends: 10948 [2021-12-17 04:36:14,912 INFO L226 Difference]: Without dead ends: 7455 [2021-12-17 04:36:14,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:36:14,919 INFO L933 BasicCegarLoop]: 1014 mSDtfsCounter, 750 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 779 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 779 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1163 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [779 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2021-12-17 04:36:14,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 7440. [2021-12-17 04:36:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7440 states, 7439 states have (on average 1.345073262535287) internal successors, (10006), 7439 states have internal predecessors, (10006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7440 states to 7440 states and 10006 transitions. [2021-12-17 04:36:15,019 INFO L78 Accepts]: Start accepts. Automaton has 7440 states and 10006 transitions. Word has length 146 [2021-12-17 04:36:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:15,020 INFO L470 AbstractCegarLoop]: Abstraction has 7440 states and 10006 transitions. [2021-12-17 04:36:15,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7440 states and 10006 transitions. [2021-12-17 04:36:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-17 04:36:15,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:15,022 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:15,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:36:15,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:15,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash -686540845, now seen corresponding path program 1 times [2021-12-17 04:36:15,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:15,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804348688] [2021-12-17 04:36:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:15,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 04:36:15,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:15,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804348688] [2021-12-17 04:36:15,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804348688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:15,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:15,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:36:15,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289976685] [2021-12-17 04:36:15,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:15,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:15,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:15,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:15,387 INFO L87 Difference]: Start difference. First operand 7440 states and 10006 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:18,339 INFO L93 Difference]: Finished difference Result 19635 states and 27148 transitions. [2021-12-17 04:36:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:18,339 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2021-12-17 04:36:18,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:18,373 INFO L225 Difference]: With dead ends: 19635 [2021-12-17 04:36:18,373 INFO L226 Difference]: Without dead ends: 12984 [2021-12-17 04:36:18,383 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:18,384 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 946 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:18,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 836 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:36:18,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12984 states. [2021-12-17 04:36:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12984 to 12975. [2021-12-17 04:36:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12975 states, 12974 states have (on average 1.2719284723292739) internal successors, (16502), 12974 states have internal predecessors, (16502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12975 states to 12975 states and 16502 transitions. [2021-12-17 04:36:18,612 INFO L78 Accepts]: Start accepts. Automaton has 12975 states and 16502 transitions. Word has length 188 [2021-12-17 04:36:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:18,613 INFO L470 AbstractCegarLoop]: Abstraction has 12975 states and 16502 transitions. [2021-12-17 04:36:18,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 12975 states and 16502 transitions. [2021-12-17 04:36:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 04:36:18,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:18,616 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:18,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:36:18,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:18,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:18,617 INFO L85 PathProgramCache]: Analyzing trace with hash 847969043, now seen corresponding path program 1 times [2021-12-17 04:36:18,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:18,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673307682] [2021-12-17 04:36:18,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:18,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:18,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:18,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673307682] [2021-12-17 04:36:18,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673307682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:18,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:18,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:18,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563412632] [2021-12-17 04:36:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:18,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:36:18,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:36:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:18,731 INFO L87 Difference]: Start difference. First operand 12975 states and 16502 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:24,163 INFO L93 Difference]: Finished difference Result 45030 states and 58434 transitions. [2021-12-17 04:36:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:36:24,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-12-17 04:36:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:24,213 INFO L225 Difference]: With dead ends: 45030 [2021-12-17 04:36:24,214 INFO L226 Difference]: Without dead ends: 32844 [2021-12-17 04:36:24,225 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:24,226 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1624 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 6078 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1624 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 6702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 6078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:24,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1624 Valid, 1151 Invalid, 6702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 6078 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 04:36:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32844 states. [2021-12-17 04:36:24,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32844 to 32694. [2021-12-17 04:36:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32694 states, 32693 states have (on average 1.2306915853546632) internal successors, (40235), 32693 states have internal predecessors, (40235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32694 states to 32694 states and 40235 transitions. [2021-12-17 04:36:24,585 INFO L78 Accepts]: Start accepts. Automaton has 32694 states and 40235 transitions. Word has length 218 [2021-12-17 04:36:24,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:24,586 INFO L470 AbstractCegarLoop]: Abstraction has 32694 states and 40235 transitions. [2021-12-17 04:36:24,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32694 states and 40235 transitions. [2021-12-17 04:36:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-12-17 04:36:24,588 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:24,588 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:24,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:36:24,589 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1414983675, now seen corresponding path program 1 times [2021-12-17 04:36:24,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:24,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315782694] [2021-12-17 04:36:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:24,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:36:24,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:24,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315782694] [2021-12-17 04:36:24,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315782694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:24,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:24,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:24,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245822655] [2021-12-17 04:36:24,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:24,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:24,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:24,671 INFO L87 Difference]: Start difference. First operand 32694 states and 40235 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:27,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:27,711 INFO L93 Difference]: Finished difference Result 79567 states and 100193 transitions. [2021-12-17 04:36:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 239 [2021-12-17 04:36:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:27,773 INFO L225 Difference]: With dead ends: 79567 [2021-12-17 04:36:27,774 INFO L226 Difference]: Without dead ends: 47662 [2021-12-17 04:36:27,789 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:27,789 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 818 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 3311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:27,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 1040 Invalid, 3311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:27,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47662 states. [2021-12-17 04:36:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47662 to 47652. [2021-12-17 04:36:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47652 states, 47651 states have (on average 1.212944114499171) internal successors, (57798), 47651 states have internal predecessors, (57798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47652 states to 47652 states and 57798 transitions. [2021-12-17 04:36:28,188 INFO L78 Accepts]: Start accepts. Automaton has 47652 states and 57798 transitions. Word has length 239 [2021-12-17 04:36:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:28,189 INFO L470 AbstractCegarLoop]: Abstraction has 47652 states and 57798 transitions. [2021-12-17 04:36:28,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 47652 states and 57798 transitions. [2021-12-17 04:36:28,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-17 04:36:28,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:28,191 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:28,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:36:28,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1732695792, now seen corresponding path program 1 times [2021-12-17 04:36:28,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:28,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732161248] [2021-12-17 04:36:28,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:28,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 04:36:28,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:28,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732161248] [2021-12-17 04:36:28,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732161248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:28,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:28,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:36:28,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393137246] [2021-12-17 04:36:28,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:28,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:28,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:28,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:28,286 INFO L87 Difference]: Start difference. First operand 47652 states and 57798 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:31,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:31,348 INFO L93 Difference]: Finished difference Result 126774 states and 155041 transitions. [2021-12-17 04:36:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 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 251 [2021-12-17 04:36:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:31,438 INFO L225 Difference]: With dead ends: 126774 [2021-12-17 04:36:31,438 INFO L226 Difference]: Without dead ends: 79911 [2021-12-17 04:36:31,463 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:31,463 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 852 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2315 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 2315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:31,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 996 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 2315 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:36:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79911 states. [2021-12-17 04:36:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79911 to 75184. [2021-12-17 04:36:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75184 states, 75183 states have (on average 1.171701049439368) internal successors, (88092), 75183 states have internal predecessors, (88092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75184 states to 75184 states and 88092 transitions. [2021-12-17 04:36:32,304 INFO L78 Accepts]: Start accepts. Automaton has 75184 states and 88092 transitions. Word has length 251 [2021-12-17 04:36:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:32,304 INFO L470 AbstractCegarLoop]: Abstraction has 75184 states and 88092 transitions. [2021-12-17 04:36:32,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:32,305 INFO L276 IsEmpty]: Start isEmpty. Operand 75184 states and 88092 transitions. [2021-12-17 04:36:32,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2021-12-17 04:36:32,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:32,309 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:32,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:36:32,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1002442702, now seen corresponding path program 1 times [2021-12-17 04:36:32,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468387817] [2021-12-17 04:36:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:32,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 313 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 04:36:32,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:32,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468387817] [2021-12-17 04:36:32,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468387817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:32,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:32,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:32,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003118637] [2021-12-17 04:36:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:32,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:36:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:36:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:32,392 INFO L87 Difference]: Start difference. First operand 75184 states and 88092 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) [2021-12-17 04:36:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:38,655 INFO L93 Difference]: Finished difference Result 200958 states and 237609 transitions. [2021-12-17 04:36:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:36:38,655 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 309 [2021-12-17 04:36:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:38,804 INFO L225 Difference]: With dead ends: 200958 [2021-12-17 04:36:38,805 INFO L226 Difference]: Without dead ends: 126563 [2021-12-17 04:36:38,856 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:38,857 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 1744 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6026 mSolverCounterSat, 1208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 7234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1208 IncrementalHoareTripleChecker+Valid, 6026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:38,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1744 Valid, 652 Invalid, 7234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1208 Valid, 6026 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 04:36:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126563 states. [2021-12-17 04:36:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126563 to 124860. [2021-12-17 04:36:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124860 states, 124859 states have (on average 1.1684940613011476) internal successors, (145897), 124859 states have internal predecessors, (145897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124860 states to 124860 states and 145897 transitions. [2021-12-17 04:36:40,579 INFO L78 Accepts]: Start accepts. Automaton has 124860 states and 145897 transitions. Word has length 309 [2021-12-17 04:36:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:40,579 INFO L470 AbstractCegarLoop]: Abstraction has 124860 states and 145897 transitions. [2021-12-17 04:36:40,579 INFO L471 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) [2021-12-17 04:36:40,580 INFO L276 IsEmpty]: Start isEmpty. Operand 124860 states and 145897 transitions. [2021-12-17 04:36:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-17 04:36:40,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:40,583 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:40,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:36:40,584 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1978393359, now seen corresponding path program 1 times [2021-12-17 04:36:40,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:40,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712720257] [2021-12-17 04:36:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:40,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 04:36:40,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:40,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712720257] [2021-12-17 04:36:40,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712720257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:40,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:40,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:40,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763807907] [2021-12-17 04:36:40,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:40,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:40,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:40,685 INFO L87 Difference]: Start difference. First operand 124860 states and 145897 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:43,955 INFO L93 Difference]: Finished difference Result 249757 states and 291865 transitions. [2021-12-17 04:36:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:43,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 347 [2021-12-17 04:36:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:44,124 INFO L225 Difference]: With dead ends: 249757 [2021-12-17 04:36:44,124 INFO L226 Difference]: Without dead ends: 125686 [2021-12-17 04:36:44,184 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:44,185 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:44,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1993 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:36:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125686 states. [2021-12-17 04:36:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125686 to 125648. [2021-12-17 04:36:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125648 states, 125647 states have (on average 1.1516391159359156) internal successors, (144700), 125647 states have internal predecessors, (144700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125648 states to 125648 states and 144700 transitions. [2021-12-17 04:36:45,795 INFO L78 Accepts]: Start accepts. Automaton has 125648 states and 144700 transitions. Word has length 347 [2021-12-17 04:36:45,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:45,795 INFO L470 AbstractCegarLoop]: Abstraction has 125648 states and 144700 transitions. [2021-12-17 04:36:45,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 125648 states and 144700 transitions. [2021-12-17 04:36:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2021-12-17 04:36:45,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:45,801 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:45,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:36:45,801 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:45,801 INFO L85 PathProgramCache]: Analyzing trace with hash -832537303, now seen corresponding path program 1 times [2021-12-17 04:36:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:45,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566689928] [2021-12-17 04:36:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:45,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 263 proven. 110 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 04:36:46,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566689928] [2021-12-17 04:36:46,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566689928] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:36:46,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442314657] [2021-12-17 04:36:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:46,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:36:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:36:46,010 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) [2021-12-17 04:36:46,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:36:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:46,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:36:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:36:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 04:36:46,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:36:46,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442314657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:46,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:36:46,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:36:46,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530850304] [2021-12-17 04:36:46,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:46,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:46,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:36:46,618 INFO L87 Difference]: Start difference. First operand 125648 states and 144700 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:49,775 INFO L93 Difference]: Finished difference Result 249718 states and 287452 transitions. [2021-12-17 04:36:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 376 [2021-12-17 04:36:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:50,016 INFO L225 Difference]: With dead ends: 249718 [2021-12-17 04:36:50,016 INFO L226 Difference]: Without dead ends: 124859 [2021-12-17 04:36:50,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:36:50,115 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 1094 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:50,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1445 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:36:50,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124859 states. [2021-12-17 04:36:51,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124859 to 124067. [2021-12-17 04:36:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124067 states, 124066 states have (on average 1.1104412167717184) internal successors, (137768), 124066 states have internal predecessors, (137768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124067 states to 124067 states and 137768 transitions. [2021-12-17 04:36:51,710 INFO L78 Accepts]: Start accepts. Automaton has 124067 states and 137768 transitions. Word has length 376 [2021-12-17 04:36:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:51,723 INFO L470 AbstractCegarLoop]: Abstraction has 124067 states and 137768 transitions. [2021-12-17 04:36:51,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 124067 states and 137768 transitions. [2021-12-17 04:36:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-17 04:36:51,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:51,728 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:36:51,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:36:51,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 04:36:51,929 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:51,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:51,929 INFO L85 PathProgramCache]: Analyzing trace with hash -645209022, now seen corresponding path program 1 times [2021-12-17 04:36:51,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311850110] [2021-12-17 04:36:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:51,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-12-17 04:36:52,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:52,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311850110] [2021-12-17 04:36:52,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311850110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:52,026 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:52,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:52,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981253975] [2021-12-17 04:36:52,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:52,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:36:52,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:52,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:36:52,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:36:52,028 INFO L87 Difference]: Start difference. First operand 124067 states and 137768 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:36:55,596 INFO L93 Difference]: Finished difference Result 281195 states and 315803 transitions. [2021-12-17 04:36:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:36:55,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 377 [2021-12-17 04:36:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:36:55,801 INFO L225 Difference]: With dead ends: 281195 [2021-12-17 04:36:55,801 INFO L226 Difference]: Without dead ends: 157917 [2021-12-17 04:36:55,839 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:36:55,840 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 885 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2429 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 3356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 2429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:36:55,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 961 Invalid, 3356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 2429 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:36:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157917 states. [2021-12-17 04:36:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157917 to 157897. [2021-12-17 04:36:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157897 states, 157896 states have (on average 1.1165830673354613) internal successors, (176304), 157896 states have internal predecessors, (176304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157897 states to 157897 states and 176304 transitions. [2021-12-17 04:36:57,520 INFO L78 Accepts]: Start accepts. Automaton has 157897 states and 176304 transitions. Word has length 377 [2021-12-17 04:36:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:36:57,520 INFO L470 AbstractCegarLoop]: Abstraction has 157897 states and 176304 transitions. [2021-12-17 04:36:57,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:36:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 157897 states and 176304 transitions. [2021-12-17 04:36:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-12-17 04:36:57,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:36:57,526 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:36:57,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:36:57,527 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:36:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:36:57,527 INFO L85 PathProgramCache]: Analyzing trace with hash 307251648, now seen corresponding path program 1 times [2021-12-17 04:36:57,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:36:57,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219025597] [2021-12-17 04:36:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:36:57,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:36:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:36:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 04:36:57,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:36:57,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219025597] [2021-12-17 04:36:57,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219025597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:36:57,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:36:57,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:36:57,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609400463] [2021-12-17 04:36:57,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:36:57,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:36:57,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:36:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:36:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:36:57,624 INFO L87 Difference]: Start difference. First operand 157897 states and 176304 transitions. Second operand has 4 states, 4 states have (on average 98.0) 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) [2021-12-17 04:37:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:02,216 INFO L93 Difference]: Finished difference Result 330744 states and 368848 transitions. [2021-12-17 04:37:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:37:02,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.0) 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 410 [2021-12-17 04:37:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:02,415 INFO L225 Difference]: With dead ends: 330744 [2021-12-17 04:37:02,415 INFO L226 Difference]: Without dead ends: 163401 [2021-12-17 04:37:02,498 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:02,499 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 1454 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 4601 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 4601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:02,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 1134 Invalid, 5087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 4601 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 04:37:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163401 states. [2021-12-17 04:37:03,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163401 to 152376. [2021-12-17 04:37:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152376 states, 152375 states have (on average 1.101532403609516) internal successors, (167846), 152375 states have internal predecessors, (167846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152376 states to 152376 states and 167846 transitions. [2021-12-17 04:37:04,255 INFO L78 Accepts]: Start accepts. Automaton has 152376 states and 167846 transitions. Word has length 410 [2021-12-17 04:37:04,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:04,256 INFO L470 AbstractCegarLoop]: Abstraction has 152376 states and 167846 transitions. [2021-12-17 04:37:04,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.0) 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) [2021-12-17 04:37:04,256 INFO L276 IsEmpty]: Start isEmpty. Operand 152376 states and 167846 transitions. [2021-12-17 04:37:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-12-17 04:37:04,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:04,262 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-17 04:37:04,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:37:04,263 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -482627801, now seen corresponding path program 1 times [2021-12-17 04:37:04,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:04,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45676524] [2021-12-17 04:37:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:04,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:04,653 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 388 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:37:04,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:04,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45676524] [2021-12-17 04:37:04,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45676524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:04,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:04,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:04,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939205189] [2021-12-17 04:37:04,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:04,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:04,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:04,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:04,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:04,655 INFO L87 Difference]: Start difference. First operand 152376 states and 167846 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:08,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:08,295 INFO L93 Difference]: Finished difference Result 333883 states and 370659 transitions. [2021-12-17 04:37:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:08,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 469 [2021-12-17 04:37:08,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:08,520 INFO L225 Difference]: With dead ends: 333883 [2021-12-17 04:37:08,520 INFO L226 Difference]: Without dead ends: 181509 [2021-12-17 04:37:08,591 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:08,593 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 722 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 2501 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:08,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1906 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2501 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:37:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181509 states. [2021-12-17 04:37:10,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181509 to 179918. [2021-12-17 04:37:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179918 states, 179917 states have (on average 1.089385661165982) internal successors, (195999), 179917 states have internal predecessors, (195999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179918 states to 179918 states and 195999 transitions. [2021-12-17 04:37:10,551 INFO L78 Accepts]: Start accepts. Automaton has 179918 states and 195999 transitions. Word has length 469 [2021-12-17 04:37:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:10,551 INFO L470 AbstractCegarLoop]: Abstraction has 179918 states and 195999 transitions. [2021-12-17 04:37:10,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 179918 states and 195999 transitions. [2021-12-17 04:37:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-12-17 04:37:10,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:10,558 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:10,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:37:10,558 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash 552198721, now seen corresponding path program 1 times [2021-12-17 04:37:10,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:10,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877118084] [2021-12-17 04:37:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:10,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 522 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-17 04:37:10,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:10,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877118084] [2021-12-17 04:37:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877118084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:10,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:10,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906680655] [2021-12-17 04:37:10,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:10,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:37:10,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:10,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:37:10,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:37:10,674 INFO L87 Difference]: Start difference. First operand 179918 states and 195999 transitions. Second operand has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:15,673 INFO L93 Difference]: Finished difference Result 359069 states and 391240 transitions. [2021-12-17 04:37:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:37:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 470 [2021-12-17 04:37:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:15,897 INFO L225 Difference]: With dead ends: 359069 [2021-12-17 04:37:15,897 INFO L226 Difference]: Without dead ends: 179940 [2021-12-17 04:37:15,971 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:15,972 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 1438 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 4995 mSolverCounterSat, 437 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 5432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 4995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:15,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1438 Valid, 1136 Invalid, 5432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 4995 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 04:37:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179940 states. [2021-12-17 04:37:17,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179940 to 179918. [2021-12-17 04:37:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179918 states, 179917 states have (on average 1.0825380592161942) internal successors, (194767), 179917 states have internal predecessors, (194767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:18,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179918 states to 179918 states and 194767 transitions. [2021-12-17 04:37:18,013 INFO L78 Accepts]: Start accepts. Automaton has 179918 states and 194767 transitions. Word has length 470 [2021-12-17 04:37:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:37:18,013 INFO L470 AbstractCegarLoop]: Abstraction has 179918 states and 194767 transitions. [2021-12-17 04:37:18,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.25) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:18,013 INFO L276 IsEmpty]: Start isEmpty. Operand 179918 states and 194767 transitions. [2021-12-17 04:37:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-12-17 04:37:18,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:37:18,024 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:37:18,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:37:18,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:37:18,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:37:18,024 INFO L85 PathProgramCache]: Analyzing trace with hash -493778240, now seen corresponding path program 1 times [2021-12-17 04:37:18,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:37:18,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395979346] [2021-12-17 04:37:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:37:18,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:37:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:37:18,145 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 759 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 04:37:18,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:37:18,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395979346] [2021-12-17 04:37:18,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395979346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:37:18,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:37:18,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:37:18,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850145941] [2021-12-17 04:37:18,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:37:18,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:37:18,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:37:18,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:37:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:37:18,147 INFO L87 Difference]: Start difference. First operand 179918 states and 194767 transitions. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:37:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:37:21,719 INFO L93 Difference]: Finished difference Result 338597 states and 367554 transitions. [2021-12-17 04:37:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:37:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 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 543 [2021-12-17 04:37:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:37:22,271 INFO L225 Difference]: With dead ends: 338597 [2021-12-17 04:37:22,272 INFO L226 Difference]: Without dead ends: 179938 [2021-12-17 04:37:22,350 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:37:22,352 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 725 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:37:22,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1802 Invalid, 2851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:37:22,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179938 states. [2021-12-17 04:37:23,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179938 to 179129. [2021-12-17 04:37:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179129 states, 179128 states have (on average 1.071278638738779) internal successors, (191896), 179128 states have internal predecessors, (191896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)