./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label44.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem12_label44.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 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:49:03,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:49:03,585 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:49:03,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:49:03,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:49:03,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:49:03,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:49:03,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:49:03,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:49:03,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:49:03,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:49:03,634 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:49:03,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:49:03,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:49:03,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:49:03,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:49:03,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:49:03,644 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:49:03,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:49:03,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:49:03,650 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:49:03,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:49:03,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:49:03,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:49:03,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:49:03,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:49:03,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:49:03,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:49:03,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:49:03,661 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:49:03,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:49:03,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:49:03,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:49:03,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:49:03,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:49:03,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:49:03,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:49:03,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:49:03,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:49:03,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:49:03,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:49:03,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:49:03,674 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:49:03,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:49:03,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:49:03,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:49:03,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:49:03,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:49:03,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:49:03,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:49:03,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:49:03,704 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:49:03,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:49:03,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:49:03,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:49:03,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:49:03,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:49:03,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:49:03,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:49:03,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:49:03,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:49:03,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:49:03,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:49:03,707 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:49:03,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:49:03,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:49:03,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:49:03,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:49:03,708 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:49:03,709 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:49:03,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:49:03,709 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4590079a5f8946ec9488ef76281079c2cb860e2f88ad1b21eefdd23ad59a57f9 [2022-07-20 23:49:03,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:49:03,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:49:03,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:49:03,998 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:49:03,998 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:49:03,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2022-07-20 23:49:04,040 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acb02c8c/86311dc6e3494b63a8d8d703c61648f9/FLAGb02409885 [2022-07-20 23:49:04,599 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:49:04,599 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label44.c [2022-07-20 23:49:04,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acb02c8c/86311dc6e3494b63a8d8d703c61648f9/FLAGb02409885 [2022-07-20 23:49:04,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6acb02c8c/86311dc6e3494b63a8d8d703c61648f9 [2022-07-20 23:49:04,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:49:04,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:49:04,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:49:04,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:49:04,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:49:04,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:04" (1/1) ... [2022-07-20 23:49:04,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7dd8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:04, skipping insertion in model container [2022-07-20 23:49:04,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:49:04" (1/1) ... [2022-07-20 23:49:04,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:49:04,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:49:05,176 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/Problem12_label44.c[6250,6263] [2022-07-20 23:49:05,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:49:05,726 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:49:05,749 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/Problem12_label44.c[6250,6263] [2022-07-20 23:49:06,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:49:06,103 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:49:06,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06 WrapperNode [2022-07-20 23:49:06,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:49:06,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:49:06,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:49:06,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:49:06,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,477 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2022-07-20 23:49:06,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:49:06,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:49:06,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:49:06,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:49:06,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,526 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:49:06,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:49:06,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:49:06,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:49:06,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (1/1) ... [2022-07-20 23:49:06,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:49:06,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:49:06,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 23:49:06,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 23:49:06,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:49:06,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:49:06,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:49:06,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:49:07,073 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:49:07,074 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:49:09,789 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:49:09,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:49:09,799 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:49:09,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:09 BoogieIcfgContainer [2022-07-20 23:49:09,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:49:09,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:49:09,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:49:09,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:49:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:49:04" (1/3) ... [2022-07-20 23:49:09,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d5c878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:09, skipping insertion in model container [2022-07-20 23:49:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:49:06" (2/3) ... [2022-07-20 23:49:09,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33d5c878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:49:09, skipping insertion in model container [2022-07-20 23:49:09,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:49:09" (3/3) ... [2022-07-20 23:49:09,806 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label44.c [2022-07-20 23:49:09,815 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:49:09,815 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:49:09,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:49:09,855 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@620daa4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d6dfd04 [2022-07-20 23:49:09,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:49:09,861 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 23:49:09,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:09,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:09,868 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2022-07-20 23:49:09,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:09,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212708248] [2022-07-20 23:49:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:09,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:49:10,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:10,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212708248] [2022-07-20 23:49:10,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212708248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:10,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:10,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:49:10,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586411397] [2022-07-20 23:49:10,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:10,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:10,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:10,066 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:12,894 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2022-07-20 23:49:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2022-07-20 23:49:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:12,918 INFO L225 Difference]: With dead ends: 2388 [2022-07-20 23:49:12,920 INFO L226 Difference]: Without dead ends: 1506 [2022-07-20 23:49:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:12,933 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 784 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:12,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 481 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:49:12,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-07-20 23:49:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2022-07-20 23:49:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6385382059800664) internal successors, (2466), 1505 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2466 transitions. [2022-07-20 23:49:13,025 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2466 transitions. Word has length 50 [2022-07-20 23:49:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:13,025 INFO L495 AbstractCegarLoop]: Abstraction has 1506 states and 2466 transitions. [2022-07-20 23:49:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2466 transitions. [2022-07-20 23:49:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 23:49:13,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:13,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:13,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:49:13,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:13,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1850963095, now seen corresponding path program 1 times [2022-07-20 23:49:13,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:13,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649317367] [2022-07-20 23:49:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:13,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:49:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649317367] [2022-07-20 23:49:13,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649317367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:13,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:13,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255074560] [2022-07-20 23:49:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:49:13,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:49:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:49:13,302 INFO L87 Difference]: Start difference. First operand 1506 states and 2466 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:16,566 INFO L93 Difference]: Finished difference Result 4549 states and 7430 transitions. [2022-07-20 23:49:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:49:16,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 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 121 [2022-07-20 23:49:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:16,599 INFO L225 Difference]: With dead ends: 4549 [2022-07-20 23:49:16,600 INFO L226 Difference]: Without dead ends: 3008 [2022-07-20 23:49:16,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:49:16,616 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 690 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 3732 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 4396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 3732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:16,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 656 Invalid, 4396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 3732 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:49:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2022-07-20 23:49:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2022-07-20 23:49:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.341536415031593) internal successors, (4034), 3007 states have internal predecessors, (4034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4034 transitions. [2022-07-20 23:49:16,671 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4034 transitions. Word has length 121 [2022-07-20 23:49:16,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:16,674 INFO L495 AbstractCegarLoop]: Abstraction has 3008 states and 4034 transitions. [2022-07-20 23:49:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:16,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4034 transitions. [2022-07-20 23:49:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-20 23:49:16,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:16,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:16,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:49:16,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -938273718, now seen corresponding path program 1 times [2022-07-20 23:49:16,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928170533] [2022-07-20 23:49:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:16,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:16,871 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:49:16,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928170533] [2022-07-20 23:49:16,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928170533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:16,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:16,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130602652] [2022-07-20 23:49:16,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:16,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:49:16,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:49:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:49:16,874 INFO L87 Difference]: Start difference. First operand 3008 states and 4034 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:20,710 INFO L93 Difference]: Finished difference Result 9769 states and 12892 transitions. [2022-07-20 23:49:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:49:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2022-07-20 23:49:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:20,741 INFO L225 Difference]: With dead ends: 9769 [2022-07-20 23:49:20,741 INFO L226 Difference]: Without dead ends: 6763 [2022-07-20 23:49:20,745 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:49:20,750 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 2093 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4273 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2093 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 4840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 4273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:20,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2093 Valid, 452 Invalid, 4840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 4273 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-20 23:49:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2022-07-20 23:49:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2022-07-20 23:49:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.287341023365868) internal successors, (8705), 6762 states have internal predecessors, (8705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 8705 transitions. [2022-07-20 23:49:20,835 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 8705 transitions. Word has length 159 [2022-07-20 23:49:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:20,836 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 8705 transitions. [2022-07-20 23:49:20,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 8705 transitions. [2022-07-20 23:49:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-07-20 23:49:20,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:20,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:49:20,840 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -341145559, now seen corresponding path program 1 times [2022-07-20 23:49:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:20,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202867774] [2022-07-20 23:49:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-20 23:49:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:21,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202867774] [2022-07-20 23:49:21,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202867774] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:21,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:21,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902358498] [2022-07-20 23:49:21,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:49:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:49:21,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:49:21,020 INFO L87 Difference]: Start difference. First operand 6763 states and 8705 transitions. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:24,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:24,340 INFO L93 Difference]: Finished difference Result 15816 states and 21393 transitions. [2022-07-20 23:49:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:49:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 262 [2022-07-20 23:49:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:24,364 INFO L225 Difference]: With dead ends: 15816 [2022-07-20 23:49:24,365 INFO L226 Difference]: Without dead ends: 9769 [2022-07-20 23:49:24,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:49:24,371 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 776 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3909 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 4451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:24,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 492 Invalid, 4451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3909 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:49:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2022-07-20 23:49:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2022-07-20 23:49:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.272987917263977) internal successors, (12432), 9766 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12432 transitions. [2022-07-20 23:49:24,483 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12432 transitions. Word has length 262 [2022-07-20 23:49:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:24,483 INFO L495 AbstractCegarLoop]: Abstraction has 9767 states and 12432 transitions. [2022-07-20 23:49:24,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12432 transitions. [2022-07-20 23:49:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-20 23:49:24,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:24,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:49:24,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -533867888, now seen corresponding path program 1 times [2022-07-20 23:49:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175104305] [2022-07-20 23:49:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:24,671 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 41 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:49:24,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:24,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175104305] [2022-07-20 23:49:24,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175104305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:49:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087183941] [2022-07-20 23:49:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:24,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:49:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:49:24,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 23:49:24,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:49:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:24,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:49:24,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:49:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:49:24,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:49:24,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087183941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:24,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:49:24,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-20 23:49:24,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763019908] [2022-07-20 23:49:24,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:24,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:24,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:24,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:24,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:49:24,907 INFO L87 Difference]: Start difference. First operand 9767 states and 12432 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:27,277 INFO L93 Difference]: Finished difference Result 26291 states and 34151 transitions. [2022-07-20 23:49:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:27,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 280 [2022-07-20 23:49:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:27,342 INFO L225 Difference]: With dead ends: 26291 [2022-07-20 23:49:27,344 INFO L226 Difference]: Without dead ends: 17277 [2022-07-20 23:49:27,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:49:27,363 INFO L413 NwaCegarLoop]: 1087 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 2902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:27,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1095 Invalid, 2902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:49:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2022-07-20 23:49:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 17277. [2022-07-20 23:49:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17277 states, 17276 states have (on average 1.260997916184302) internal successors, (21785), 17276 states have internal predecessors, (21785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17277 states to 17277 states and 21785 transitions. [2022-07-20 23:49:27,680 INFO L78 Accepts]: Start accepts. Automaton has 17277 states and 21785 transitions. Word has length 280 [2022-07-20 23:49:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:27,682 INFO L495 AbstractCegarLoop]: Abstraction has 17277 states and 21785 transitions. [2022-07-20 23:49:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17277 states and 21785 transitions. [2022-07-20 23:49:27,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-07-20 23:49:27,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:27,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:49:27,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:49:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:49:27,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1850802994, now seen corresponding path program 1 times [2022-07-20 23:49:27,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:27,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308871881] [2022-07-20 23:49:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-20 23:49:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:28,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308871881] [2022-07-20 23:49:28,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308871881] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:28,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:28,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:49:28,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405328842] [2022-07-20 23:49:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:28,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:28,007 INFO L87 Difference]: Start difference. First operand 17277 states and 21785 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:30,261 INFO L93 Difference]: Finished difference Result 33801 states and 42812 transitions. [2022-07-20 23:49:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 284 [2022-07-20 23:49:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:30,284 INFO L225 Difference]: With dead ends: 33801 [2022-07-20 23:49:30,284 INFO L226 Difference]: Without dead ends: 17277 [2022-07-20 23:49:30,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:30,297 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 694 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:30,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 431 Invalid, 2672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:49:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2022-07-20 23:49:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 15775. [2022-07-20 23:49:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.1705337897806518) internal successors, (18464), 15774 states have internal predecessors, (18464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 18464 transitions. [2022-07-20 23:49:30,675 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 18464 transitions. Word has length 284 [2022-07-20 23:49:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:30,676 INFO L495 AbstractCegarLoop]: Abstraction has 15775 states and 18464 transitions. [2022-07-20 23:49:30,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 18464 transitions. [2022-07-20 23:49:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-07-20 23:49:30,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:30,680 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:30,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:49:30,681 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:30,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1446669815, now seen corresponding path program 1 times [2022-07-20 23:49:30,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:30,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109158629] [2022-07-20 23:49:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:30,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-20 23:49:30,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109158629] [2022-07-20 23:49:30,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109158629] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:30,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:30,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000153006] [2022-07-20 23:49:30,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:30,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:30,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:30,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:30,811 INFO L87 Difference]: Start difference. First operand 15775 states and 18464 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:33,274 INFO L93 Difference]: Finished difference Result 39058 states and 46323 transitions. [2022-07-20 23:49:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 363 [2022-07-20 23:49:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:33,343 INFO L225 Difference]: With dead ends: 39058 [2022-07-20 23:49:33,344 INFO L226 Difference]: Without dead ends: 24036 [2022-07-20 23:49:33,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:33,363 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 738 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 738 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:33,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [738 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-20 23:49:33,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2022-07-20 23:49:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 24036. [2022-07-20 23:49:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.1707093821510297) internal successors, (28138), 24035 states have internal predecessors, (28138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:33,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28138 transitions. [2022-07-20 23:49:33,615 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28138 transitions. Word has length 363 [2022-07-20 23:49:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:33,615 INFO L495 AbstractCegarLoop]: Abstraction has 24036 states and 28138 transitions. [2022-07-20 23:49:33,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28138 transitions. [2022-07-20 23:49:33,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-07-20 23:49:33,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:33,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:33,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:49:33,621 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1093901614, now seen corresponding path program 1 times [2022-07-20 23:49:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751253827] [2022-07-20 23:49:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 324 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:49:33,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:33,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751253827] [2022-07-20 23:49:33,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751253827] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:33,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:33,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891910821] [2022-07-20 23:49:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:33,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:33,737 INFO L87 Difference]: Start difference. First operand 24036 states and 28138 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:36,484 INFO L93 Difference]: Finished difference Result 64592 states and 76565 transitions. [2022-07-20 23:49:36,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 [2022-07-20 23:49:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:36,536 INFO L225 Difference]: With dead ends: 64592 [2022-07-20 23:49:36,536 INFO L226 Difference]: Without dead ends: 41309 [2022-07-20 23:49:36,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:36,558 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 678 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2268 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 2268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:36,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 526 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [627 Valid, 2268 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:49:36,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41309 states. [2022-07-20 23:49:36,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41309 to 40558. [2022-07-20 23:49:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40558 states, 40557 states have (on average 1.154720516803511) internal successors, (46832), 40557 states have internal predecessors, (46832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40558 states to 40558 states and 46832 transitions. [2022-07-20 23:49:36,916 INFO L78 Accepts]: Start accepts. Automaton has 40558 states and 46832 transitions. Word has length 377 [2022-07-20 23:49:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:36,917 INFO L495 AbstractCegarLoop]: Abstraction has 40558 states and 46832 transitions. [2022-07-20 23:49:36,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:36,917 INFO L276 IsEmpty]: Start isEmpty. Operand 40558 states and 46832 transitions. [2022-07-20 23:49:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-07-20 23:49:36,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:36,923 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:36,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:49:36,923 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1052886306, now seen corresponding path program 1 times [2022-07-20 23:49:36,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104455230] [2022-07-20 23:49:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:36,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-07-20 23:49:37,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:37,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104455230] [2022-07-20 23:49:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104455230] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:37,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:37,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989528817] [2022-07-20 23:49:37,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:37,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:37,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:37,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:37,070 INFO L87 Difference]: Start difference. First operand 40558 states and 46832 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:39,471 INFO L93 Difference]: Finished difference Result 90126 states and 103765 transitions. [2022-07-20 23:49:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:39,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 409 [2022-07-20 23:49:39,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:39,542 INFO L225 Difference]: With dead ends: 90126 [2022-07-20 23:49:39,542 INFO L226 Difference]: Without dead ends: 50321 [2022-07-20 23:49:39,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:39,567 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 818 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:39,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [818 Valid, 900 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-20 23:49:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50321 states. [2022-07-20 23:49:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50321 to 46566. [2022-07-20 23:49:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46566 states, 46565 states have (on average 1.143326532803608) internal successors, (53239), 46565 states have internal predecessors, (53239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:40,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46566 states to 46566 states and 53239 transitions. [2022-07-20 23:49:40,059 INFO L78 Accepts]: Start accepts. Automaton has 46566 states and 53239 transitions. Word has length 409 [2022-07-20 23:49:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:40,060 INFO L495 AbstractCegarLoop]: Abstraction has 46566 states and 53239 transitions. [2022-07-20 23:49:40,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:40,060 INFO L276 IsEmpty]: Start isEmpty. Operand 46566 states and 53239 transitions. [2022-07-20 23:49:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2022-07-20 23:49:40,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:40,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:49:40,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 23:49:40,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:40,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash 684792886, now seen corresponding path program 1 times [2022-07-20 23:49:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:40,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061141259] [2022-07-20 23:49:40,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:40,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 396 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-20 23:49:40,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061141259] [2022-07-20 23:49:40,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061141259] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:40,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:40,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:40,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136712906] [2022-07-20 23:49:40,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:40,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:40,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:40,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:40,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:40,202 INFO L87 Difference]: Start difference. First operand 46566 states and 53239 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:43,253 INFO L93 Difference]: Finished difference Result 110405 states and 127520 transitions. [2022-07-20 23:49:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 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 468 [2022-07-20 23:49:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:43,335 INFO L225 Difference]: With dead ends: 110405 [2022-07-20 23:49:43,336 INFO L226 Difference]: Without dead ends: 64592 [2022-07-20 23:49:43,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:43,368 INFO L413 NwaCegarLoop]: 1256 mSDtfsCounter, 699 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:43,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1264 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:49:43,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64592 states. [2022-07-20 23:49:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64592 to 60835. [2022-07-20 23:49:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60835 states, 60834 states have (on average 1.129335568925272) internal successors, (68702), 60834 states have internal predecessors, (68702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:44,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60835 states to 60835 states and 68702 transitions. [2022-07-20 23:49:44,103 INFO L78 Accepts]: Start accepts. Automaton has 60835 states and 68702 transitions. Word has length 468 [2022-07-20 23:49:44,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:44,104 INFO L495 AbstractCegarLoop]: Abstraction has 60835 states and 68702 transitions. [2022-07-20 23:49:44,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:44,105 INFO L276 IsEmpty]: Start isEmpty. Operand 60835 states and 68702 transitions. [2022-07-20 23:49:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-07-20 23:49:44,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:44,111 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:49:44,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1938920774, now seen corresponding path program 1 times [2022-07-20 23:49:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:44,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311109208] [2022-07-20 23:49:44,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-07-20 23:49:44,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:44,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311109208] [2022-07-20 23:49:44,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311109208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:44,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:44,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:44,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428918357] [2022-07-20 23:49:44,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:44,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:44,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:44,240 INFO L87 Difference]: Start difference. First operand 60835 states and 68702 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:47,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:47,470 INFO L93 Difference]: Finished difference Result 153210 states and 172786 transitions. [2022-07-20 23:49:47,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 484 [2022-07-20 23:49:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:47,611 INFO L225 Difference]: With dead ends: 153210 [2022-07-20 23:49:47,611 INFO L226 Difference]: Without dead ends: 93128 [2022-07-20 23:49:47,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:47,653 INFO L413 NwaCegarLoop]: 1200 mSDtfsCounter, 569 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2594 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 2934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 2594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:47,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 1208 Invalid, 2934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 2594 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:49:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93128 states. [2022-07-20 23:49:48,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93128 to 88622. [2022-07-20 23:49:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88622 states, 88621 states have (on average 1.121788289457352) internal successors, (99414), 88621 states have internal predecessors, (99414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:48,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88622 states to 88622 states and 99414 transitions. [2022-07-20 23:49:48,778 INFO L78 Accepts]: Start accepts. Automaton has 88622 states and 99414 transitions. Word has length 484 [2022-07-20 23:49:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:48,779 INFO L495 AbstractCegarLoop]: Abstraction has 88622 states and 99414 transitions. [2022-07-20 23:49:48,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 88622 states and 99414 transitions. [2022-07-20 23:49:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2022-07-20 23:49:48,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:48,788 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:49:48,789 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:48,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1393823655, now seen corresponding path program 1 times [2022-07-20 23:49:48,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:48,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663415660] [2022-07-20 23:49:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:48,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 419 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 23:49:49,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:49,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663415660] [2022-07-20 23:49:49,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663415660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:49,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:49,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:49,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662921985] [2022-07-20 23:49:49,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:49,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:49,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:49,054 INFO L87 Difference]: Start difference. First operand 88622 states and 99414 transitions. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:52,161 INFO L93 Difference]: Finished difference Result 217796 states and 246607 transitions. [2022-07-20 23:49:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 521 [2022-07-20 23:49:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:52,453 INFO L225 Difference]: With dead ends: 217796 [2022-07-20 23:49:52,453 INFO L226 Difference]: Without dead ends: 129927 [2022-07-20 23:49:52,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:52,514 INFO L413 NwaCegarLoop]: 1308 mSDtfsCounter, 594 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:52,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1315 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:49:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129927 states. [2022-07-20 23:49:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129927 to 121666. [2022-07-20 23:49:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121666 states, 121665 states have (on average 1.1104590473842106) internal successors, (135104), 121665 states have internal predecessors, (135104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121666 states to 121666 states and 135104 transitions. [2022-07-20 23:49:54,153 INFO L78 Accepts]: Start accepts. Automaton has 121666 states and 135104 transitions. Word has length 521 [2022-07-20 23:49:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:54,154 INFO L495 AbstractCegarLoop]: Abstraction has 121666 states and 135104 transitions. [2022-07-20 23:49:54,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 121666 states and 135104 transitions. [2022-07-20 23:49:54,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-07-20 23:49:54,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:54,168 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:49:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:49:54,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:54,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:54,169 INFO L85 PathProgramCache]: Analyzing trace with hash -605368177, now seen corresponding path program 1 times [2022-07-20 23:49:54,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:54,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181742509] [2022-07-20 23:49:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-20 23:49:54,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:54,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181742509] [2022-07-20 23:49:54,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181742509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:54,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:54,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:54,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773640830] [2022-07-20 23:49:54,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:54,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:54,521 INFO L87 Difference]: Start difference. First operand 121666 states and 135104 transitions. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:49:57,277 INFO L93 Difference]: Finished difference Result 244832 states and 271712 transitions. [2022-07-20 23:49:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:49:57,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 571 [2022-07-20 23:49:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:49:57,429 INFO L225 Difference]: With dead ends: 244832 [2022-07-20 23:49:57,429 INFO L226 Difference]: Without dead ends: 123919 [2022-07-20 23:49:57,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:57,477 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 792 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:49:57,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 212 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:49:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2022-07-20 23:49:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 119413. [2022-07-20 23:49:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119413 states, 119412 states have (on average 1.0944461193179915) internal successors, (130690), 119412 states have internal predecessors, (130690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119413 states to 119413 states and 130690 transitions. [2022-07-20 23:49:59,124 INFO L78 Accepts]: Start accepts. Automaton has 119413 states and 130690 transitions. Word has length 571 [2022-07-20 23:49:59,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:49:59,125 INFO L495 AbstractCegarLoop]: Abstraction has 119413 states and 130690 transitions. [2022-07-20 23:49:59,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:49:59,125 INFO L276 IsEmpty]: Start isEmpty. Operand 119413 states and 130690 transitions. [2022-07-20 23:49:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-07-20 23:49:59,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:49:59,137 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2022-07-20 23:49:59,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:49:59,137 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:49:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:49:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1297666386, now seen corresponding path program 1 times [2022-07-20 23:49:59,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:49:59,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099981826] [2022-07-20 23:49:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:49:59,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:49:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:49:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 664 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-20 23:49:59,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:49:59,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099981826] [2022-07-20 23:49:59,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099981826] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:49:59,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:49:59,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:49:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759850795] [2022-07-20 23:49:59,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:49:59,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:49:59,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:49:59,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:49:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:49:59,261 INFO L87 Difference]: Start difference. First operand 119413 states and 130690 transitions. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:02,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:50:02,118 INFO L93 Difference]: Finished difference Result 268864 states and 294514 transitions. [2022-07-20 23:50:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:50:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 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 593 [2022-07-20 23:50:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:50:02,311 INFO L225 Difference]: With dead ends: 268864 [2022-07-20 23:50:02,312 INFO L226 Difference]: Without dead ends: 150204 [2022-07-20 23:50:02,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:50:02,381 INFO L413 NwaCegarLoop]: 1327 mSDtfsCounter, 675 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 2510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:50:02,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1335 Invalid, 2510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 23:50:02,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150204 states. [2022-07-20 23:50:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150204 to 149453. [2022-07-20 23:50:04,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149453 states, 149452 states have (on average 1.0841608007922277) internal successors, (162030), 149452 states have internal predecessors, (162030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149453 states to 149453 states and 162030 transitions. [2022-07-20 23:50:04,183 INFO L78 Accepts]: Start accepts. Automaton has 149453 states and 162030 transitions. Word has length 593 [2022-07-20 23:50:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:50:04,183 INFO L495 AbstractCegarLoop]: Abstraction has 149453 states and 162030 transitions. [2022-07-20 23:50:04,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:04,184 INFO L276 IsEmpty]: Start isEmpty. Operand 149453 states and 162030 transitions. [2022-07-20 23:50:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2022-07-20 23:50:04,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:50:04,465 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:50:04,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:50:04,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:50:04,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:50:04,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1416325111, now seen corresponding path program 1 times [2022-07-20 23:50:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:50:04,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288750807] [2022-07-20 23:50:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:50:04,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:50:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:50:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-07-20 23:50:04,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:50:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288750807] [2022-07-20 23:50:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288750807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:50:04,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:50:04,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:50:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421288075] [2022-07-20 23:50:04,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:50:04,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:50:04,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:50:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:50:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:50:04,842 INFO L87 Difference]: Start difference. First operand 149453 states and 162030 transitions. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:50:10,786 INFO L93 Difference]: Finished difference Result 447604 states and 486560 transitions. [2022-07-20 23:50:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:50:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 628 [2022-07-20 23:50:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:50:11,283 INFO L225 Difference]: With dead ends: 447604 [2022-07-20 23:50:11,284 INFO L226 Difference]: Without dead ends: 298904 [2022-07-20 23:50:11,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:50:11,396 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1720 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4621 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1720 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 5288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 4621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:50:11,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1720 Valid, 62 Invalid, 5288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 4621 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 23:50:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298904 states. [2022-07-20 23:50:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298904 to 296649. [2022-07-20 23:50:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296649 states, 296648 states have (on average 1.0819759445538146) internal successors, (320966), 296648 states have internal predecessors, (320966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:15,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296649 states to 296649 states and 320966 transitions. [2022-07-20 23:50:15,633 INFO L78 Accepts]: Start accepts. Automaton has 296649 states and 320966 transitions. Word has length 628 [2022-07-20 23:50:15,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:50:15,634 INFO L495 AbstractCegarLoop]: Abstraction has 296649 states and 320966 transitions. [2022-07-20 23:50:15,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:15,634 INFO L276 IsEmpty]: Start isEmpty. Operand 296649 states and 320966 transitions. [2022-07-20 23:50:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2022-07-20 23:50:15,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:50:15,658 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:50:15,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:50:15,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:50:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:50:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1226073397, now seen corresponding path program 1 times [2022-07-20 23:50:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:50:15,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430770565] [2022-07-20 23:50:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:50:15,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:50:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:50:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-07-20 23:50:16,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:50:16,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430770565] [2022-07-20 23:50:16,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430770565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:50:16,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:50:16,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 23:50:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922000347] [2022-07-20 23:50:16,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:50:16,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:50:16,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:50:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:50:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:50:16,381 INFO L87 Difference]: Start difference. First operand 296649 states and 320966 transitions. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:50:23,105 INFO L93 Difference]: Finished difference Result 725474 states and 786400 transitions. [2022-07-20 23:50:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:50:23,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 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 650 [2022-07-20 23:50:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:50:23,791 INFO L225 Difference]: With dead ends: 725474 [2022-07-20 23:50:23,791 INFO L226 Difference]: Without dead ends: 429578 [2022-07-20 23:50:23,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:50:23,966 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 1309 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4789 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1309 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:50:23,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1309 Valid, 223 Invalid, 5926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4789 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 23:50:24,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429578 states. [2022-07-20 23:50:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429578 to 388271. [2022-07-20 23:50:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388271 states, 388270 states have (on average 1.0850001287763669) internal successors, (421273), 388270 states have internal predecessors, (421273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388271 states to 388271 states and 421273 transitions. [2022-07-20 23:50:30,183 INFO L78 Accepts]: Start accepts. Automaton has 388271 states and 421273 transitions. Word has length 650 [2022-07-20 23:50:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:50:30,183 INFO L495 AbstractCegarLoop]: Abstraction has 388271 states and 421273 transitions. [2022-07-20 23:50:30,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 388271 states and 421273 transitions. [2022-07-20 23:50:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2022-07-20 23:50:30,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:50:30,713 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:50:30,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:50:30,713 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:50:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:50:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1276313430, now seen corresponding path program 1 times [2022-07-20 23:50:30,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:50:30,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203659930] [2022-07-20 23:50:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:50:30,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:50:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:50:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1304 backedges. 1010 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-07-20 23:50:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:50:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203659930] [2022-07-20 23:50:30,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203659930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:50:30,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:50:30,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:50:30,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380191899] [2022-07-20 23:50:30,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:50:30,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:50:30,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:50:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:50:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:50:30,985 INFO L87 Difference]: Start difference. First operand 388271 states and 421273 transitions. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:50:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:50:34,998 INFO L93 Difference]: Finished difference Result 760018 states and 825394 transitions. [2022-07-20 23:50:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:50:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 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 700 [2022-07-20 23:50:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:50:35,503 INFO L225 Difference]: With dead ends: 760018 [2022-07-20 23:50:35,503 INFO L226 Difference]: Without dead ends: 372500 [2022-07-20 23:50:35,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:50:35,652 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 779 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:50:35,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 139 Invalid, 2618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 23:50:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372500 states.