./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label45.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 e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:13:19,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:13:19,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:13:19,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:13:19,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:13:19,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:13:19,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:13:19,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:13:19,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:13:19,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:13:19,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:13:19,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:13:19,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:13:19,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:13:19,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:13:19,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:13:19,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:13:19,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:13:19,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:13:19,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:13:19,797 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:13:19,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:13:19,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:13:19,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:13:19,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:13:19,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:13:19,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:13:19,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:13:19,810 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:13:19,811 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:13:19,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:13:19,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:13:19,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:13:19,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:13:19,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:13:19,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:13:19,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:13:19,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:13:19,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:13:19,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:13:19,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:13:19,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:13:19,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:13:19,845 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:13:19,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:13:19,846 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:13:19,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:13:19,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:13:19,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:13:19,848 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:13:19,848 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:13:19,848 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:13:19,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:13:19,849 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:13:19,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:13:19,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:13:19,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:13:19,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:13:19,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:13:19,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:13:19,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:13:19,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:13:19,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:13:19,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:13:19,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:13:19,854 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:13:19,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e46cda06cd6f3e72cb5a00e680e37793de7d3fd440c55f6638f7eefc5d4b52af [2022-07-19 11:13:20,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:13:20,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:13:20,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:13:20,034 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:13:20,035 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:13:20,036 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-07-19 11:13:20,079 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e18772a/58f603aef6754f439367210b31ce5699/FLAGf225c2676 [2022-07-19 11:13:20,522 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:13:20,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label45.c [2022-07-19 11:13:20,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e18772a/58f603aef6754f439367210b31ce5699/FLAGf225c2676 [2022-07-19 11:13:20,817 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e18772a/58f603aef6754f439367210b31ce5699 [2022-07-19 11:13:20,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:13:20,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:13:20,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:13:20,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:13:20,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:13:20,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:13:20" (1/1) ... [2022-07-19 11:13:20,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749c7d79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:20, skipping insertion in model container [2022-07-19 11:13:20,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:13:20" (1/1) ... [2022-07-19 11:13:20,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:13:20,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:13:21,443 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/Problem03_label45.c[53653,53666] [2022-07-19 11:13:21,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:13:21,487 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:13:21,631 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/Problem03_label45.c[53653,53666] [2022-07-19 11:13:21,643 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:13:21,655 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:13:21,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21 WrapperNode [2022-07-19 11:13:21,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:13:21,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:13:21,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:13:21,658 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:13:21,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,782 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:13:21,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:13:21,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:13:21,784 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:13:21,784 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:13:21,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:13:21,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:13:21,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:13:21,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:13:21,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (1/1) ... [2022-07-19 11:13:21,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:13:21,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:21,915 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 11:13:21,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 11:13:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:13:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:13:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:13:21,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:13:22,034 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:13:22,036 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:13:23,124 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:13:23,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:13:23,136 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:13:23,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:13:23 BoogieIcfgContainer [2022-07-19 11:13:23,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:13:23,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:13:23,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:13:23,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:13:23,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:13:20" (1/3) ... [2022-07-19 11:13:23,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46036d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:13:23, skipping insertion in model container [2022-07-19 11:13:23,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:13:21" (2/3) ... [2022-07-19 11:13:23,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46036d21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:13:23, skipping insertion in model container [2022-07-19 11:13:23,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:13:23" (3/3) ... [2022-07-19 11:13:23,144 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2022-07-19 11:13:23,154 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:13:23,154 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:13:23,194 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:13:23,199 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@57eccc31, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6654578e [2022-07-19 11:13:23,199 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:13:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-19 11:13:23,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:23,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:23,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1107694590, now seen corresponding path program 1 times [2022-07-19 11:13:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:23,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076101108] [2022-07-19 11:13:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:23,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:13:23,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076101108] [2022-07-19 11:13:23,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076101108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:23,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:23,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:23,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812252679] [2022-07-19 11:13:23,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:23,612 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:24,396 INFO L93 Difference]: Finished difference Result 840 states and 1490 transitions. [2022-07-19 11:13:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-19 11:13:24,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:24,408 INFO L225 Difference]: With dead ends: 840 [2022-07-19 11:13:24,409 INFO L226 Difference]: Without dead ends: 460 [2022-07-19 11:13:24,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:24,414 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:24,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 134 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:13:24,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-19 11:13:24,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 445. [2022-07-19 11:13:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.614864864864865) internal successors, (717), 444 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 717 transitions. [2022-07-19 11:13:24,477 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 717 transitions. Word has length 144 [2022-07-19 11:13:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:24,478 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 717 transitions. [2022-07-19 11:13:24,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 717 transitions. [2022-07-19 11:13:24,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-19 11:13:24,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:24,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:24,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:13:24,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:24,482 INFO L85 PathProgramCache]: Analyzing trace with hash -235311730, now seen corresponding path program 1 times [2022-07-19 11:13:24,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:24,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091308045] [2022-07-19 11:13:24,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:24,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:13:24,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:24,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091308045] [2022-07-19 11:13:24,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091308045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:24,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:24,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:24,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819227889] [2022-07-19 11:13:24,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:24,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:24,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:24,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:24,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:24,587 INFO L87 Difference]: Start difference. First operand 445 states and 717 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:25,274 INFO L93 Difference]: Finished difference Result 1324 states and 2138 transitions. [2022-07-19 11:13:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-07-19 11:13:25,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:25,277 INFO L225 Difference]: With dead ends: 1324 [2022-07-19 11:13:25,277 INFO L226 Difference]: Without dead ends: 881 [2022-07-19 11:13:25,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:25,279 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:25,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 125 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:13:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-07-19 11:13:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 877. [2022-07-19 11:13:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.595890410958904) internal successors, (1398), 876 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1398 transitions. [2022-07-19 11:13:25,301 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1398 transitions. Word has length 150 [2022-07-19 11:13:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:25,301 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 1398 transitions. [2022-07-19 11:13:25,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:25,302 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1398 transitions. [2022-07-19 11:13:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-19 11:13:25,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:25,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:25,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:13:25,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:25,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:25,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1640240486, now seen corresponding path program 1 times [2022-07-19 11:13:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:25,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900179054] [2022-07-19 11:13:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:25,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:13:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:25,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900179054] [2022-07-19 11:13:25,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900179054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:25,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:25,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539801849] [2022-07-19 11:13:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:25,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:25,388 INFO L87 Difference]: Start difference. First operand 877 states and 1398 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:25,995 INFO L93 Difference]: Finished difference Result 2565 states and 4101 transitions. [2022-07-19 11:13:25,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:25,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2022-07-19 11:13:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:26,000 INFO L225 Difference]: With dead ends: 2565 [2022-07-19 11:13:26,000 INFO L226 Difference]: Without dead ends: 1690 [2022-07-19 11:13:26,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:26,002 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 216 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:26,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 192 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-07-19 11:13:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1690. [2022-07-19 11:13:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.3860272350503255) internal successors, (2341), 1689 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2341 transitions. [2022-07-19 11:13:26,054 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2341 transitions. Word has length 150 [2022-07-19 11:13:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:26,055 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 2341 transitions. [2022-07-19 11:13:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2341 transitions. [2022-07-19 11:13:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-19 11:13:26,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:26,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:26,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:13:26,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:26,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:26,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1267325975, now seen corresponding path program 1 times [2022-07-19 11:13:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:26,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39092261] [2022-07-19 11:13:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:13:26,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:26,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39092261] [2022-07-19 11:13:26,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39092261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:26,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:26,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:26,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242229823] [2022-07-19 11:13:26,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:26,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:26,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:26,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:26,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:26,120 INFO L87 Difference]: Start difference. First operand 1690 states and 2341 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:26,725 INFO L93 Difference]: Finished difference Result 5048 states and 6998 transitions. [2022-07-19 11:13:26,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:26,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-19 11:13:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:26,735 INFO L225 Difference]: With dead ends: 5048 [2022-07-19 11:13:26,735 INFO L226 Difference]: Without dead ends: 3360 [2022-07-19 11:13:26,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:26,739 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:26,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 206 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:26,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2022-07-19 11:13:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3351. [2022-07-19 11:13:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3350 states have (on average 1.3722388059701494) internal successors, (4597), 3350 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4597 transitions. [2022-07-19 11:13:26,786 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4597 transitions. Word has length 156 [2022-07-19 11:13:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:26,787 INFO L495 AbstractCegarLoop]: Abstraction has 3351 states and 4597 transitions. [2022-07-19 11:13:26,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4597 transitions. [2022-07-19 11:13:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-07-19 11:13:26,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:26,821 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:26,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:13:26,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:26,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:26,822 INFO L85 PathProgramCache]: Analyzing trace with hash -267079187, now seen corresponding path program 1 times [2022-07-19 11:13:26,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:26,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65685872] [2022-07-19 11:13:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:26,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 11:13:26,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:26,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65685872] [2022-07-19 11:13:26,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65685872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:26,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:26,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:26,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535452391] [2022-07-19 11:13:26,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:26,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:26,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:26,892 INFO L87 Difference]: Start difference. First operand 3351 states and 4597 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:27,477 INFO L93 Difference]: Finished difference Result 9992 states and 13723 transitions. [2022-07-19 11:13:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 158 [2022-07-19 11:13:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:27,497 INFO L225 Difference]: With dead ends: 9992 [2022-07-19 11:13:27,498 INFO L226 Difference]: Without dead ends: 6643 [2022-07-19 11:13:27,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:27,506 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:27,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2022-07-19 11:13:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6605. [2022-07-19 11:13:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6605 states, 6604 states have (on average 1.3452453058752272) internal successors, (8884), 6604 states have internal predecessors, (8884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6605 states to 6605 states and 8884 transitions. [2022-07-19 11:13:27,651 INFO L78 Accepts]: Start accepts. Automaton has 6605 states and 8884 transitions. Word has length 158 [2022-07-19 11:13:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:27,651 INFO L495 AbstractCegarLoop]: Abstraction has 6605 states and 8884 transitions. [2022-07-19 11:13:27,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6605 states and 8884 transitions. [2022-07-19 11:13:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-19 11:13:27,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:27,660 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:27,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:13:27,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:27,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1504485225, now seen corresponding path program 1 times [2022-07-19 11:13:27,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:27,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023758300] [2022-07-19 11:13:27,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:27,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:13:27,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:27,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023758300] [2022-07-19 11:13:27,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023758300] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:27,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:27,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:27,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752397192] [2022-07-19 11:13:27,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:27,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:27,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:27,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:27,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:27,719 INFO L87 Difference]: Start difference. First operand 6605 states and 8884 transitions. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:28,450 INFO L93 Difference]: Finished difference Result 17695 states and 24239 transitions. [2022-07-19 11:13:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 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 172 [2022-07-19 11:13:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:28,475 INFO L225 Difference]: With dead ends: 17695 [2022-07-19 11:13:28,476 INFO L226 Difference]: Without dead ends: 11092 [2022-07-19 11:13:28,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:28,483 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:28,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 364 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11092 states. [2022-07-19 11:13:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11092 to 11082. [2022-07-19 11:13:28,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11082 states, 11081 states have (on average 1.2974460788737479) internal successors, (14377), 11081 states have internal predecessors, (14377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11082 states to 11082 states and 14377 transitions. [2022-07-19 11:13:28,657 INFO L78 Accepts]: Start accepts. Automaton has 11082 states and 14377 transitions. Word has length 172 [2022-07-19 11:13:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:28,657 INFO L495 AbstractCegarLoop]: Abstraction has 11082 states and 14377 transitions. [2022-07-19 11:13:28,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11082 states and 14377 transitions. [2022-07-19 11:13:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-19 11:13:28,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:28,669 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:28,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:13:28,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:28,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2111621614, now seen corresponding path program 1 times [2022-07-19 11:13:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:28,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650073589] [2022-07-19 11:13:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:13:28,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650073589] [2022-07-19 11:13:28,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650073589] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970464011] [2022-07-19 11:13:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:28,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:28,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:28,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:28,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 11:13:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:28,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:13:28,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:28,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970464011] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:28,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:28,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:13:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575501412] [2022-07-19 11:13:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:28,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:28,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:28,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:28,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:28,921 INFO L87 Difference]: Start difference. First operand 11082 states and 14377 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:29,605 INFO L93 Difference]: Finished difference Result 31946 states and 41599 transitions. [2022-07-19 11:13:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-19 11:13:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:29,647 INFO L225 Difference]: With dead ends: 31946 [2022-07-19 11:13:29,648 INFO L226 Difference]: Without dead ends: 20866 [2022-07-19 11:13:29,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:29,659 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 230 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:29,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 206 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20866 states. [2022-07-19 11:13:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20866 to 20862. [2022-07-19 11:13:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20862 states, 20861 states have (on average 1.268012079957816) internal successors, (26452), 20861 states have internal predecessors, (26452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20862 states to 20862 states and 26452 transitions. [2022-07-19 11:13:29,968 INFO L78 Accepts]: Start accepts. Automaton has 20862 states and 26452 transitions. Word has length 181 [2022-07-19 11:13:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:29,968 INFO L495 AbstractCegarLoop]: Abstraction has 20862 states and 26452 transitions. [2022-07-19 11:13:29,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 20862 states and 26452 transitions. [2022-07-19 11:13:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-19 11:13:29,995 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:29,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:30,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 11:13:30,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:30,213 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:30,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1871477101, now seen corresponding path program 1 times [2022-07-19 11:13:30,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:30,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872561376] [2022-07-19 11:13:30,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:30,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 11:13:30,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:30,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872561376] [2022-07-19 11:13:30,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872561376] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:30,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:30,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169887333] [2022-07-19 11:13:30,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:30,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:30,285 INFO L87 Difference]: Start difference. First operand 20862 states and 26452 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:31,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:31,019 INFO L93 Difference]: Finished difference Result 48864 states and 62100 transitions. [2022-07-19 11:13:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:31,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 185 [2022-07-19 11:13:31,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:31,064 INFO L225 Difference]: With dead ends: 48864 [2022-07-19 11:13:31,064 INFO L226 Difference]: Without dead ends: 28004 [2022-07-19 11:13:31,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:31,087 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:31,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 361 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28004 states. [2022-07-19 11:13:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28004 to 27969. [2022-07-19 11:13:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27969 states, 27968 states have (on average 1.2254362128146452) internal successors, (34273), 27968 states have internal predecessors, (34273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27969 states to 27969 states and 34273 transitions. [2022-07-19 11:13:31,452 INFO L78 Accepts]: Start accepts. Automaton has 27969 states and 34273 transitions. Word has length 185 [2022-07-19 11:13:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:31,453 INFO L495 AbstractCegarLoop]: Abstraction has 27969 states and 34273 transitions. [2022-07-19 11:13:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 27969 states and 34273 transitions. [2022-07-19 11:13:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-19 11:13:31,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:31,474 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:13:31,475 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash 564235399, now seen corresponding path program 1 times [2022-07-19 11:13:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:31,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501333464] [2022-07-19 11:13:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:13:31,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:31,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501333464] [2022-07-19 11:13:31,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501333464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:31,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:31,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709983496] [2022-07-19 11:13:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:31,558 INFO L87 Difference]: Start difference. First operand 27969 states and 34273 transitions. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:32,331 INFO L93 Difference]: Finished difference Result 50148 states and 61194 transitions. [2022-07-19 11:13:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:32,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 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 200 [2022-07-19 11:13:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:32,361 INFO L225 Difference]: With dead ends: 50148 [2022-07-19 11:13:32,361 INFO L226 Difference]: Without dead ends: 22384 [2022-07-19 11:13:32,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:32,384 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 460 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:32,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 54 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2022-07-19 11:13:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 22384. [2022-07-19 11:13:32,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22384 states, 22383 states have (on average 1.1557878747263548) internal successors, (25870), 22383 states have internal predecessors, (25870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 25870 transitions. [2022-07-19 11:13:32,703 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 25870 transitions. Word has length 200 [2022-07-19 11:13:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:32,703 INFO L495 AbstractCegarLoop]: Abstraction has 22384 states and 25870 transitions. [2022-07-19 11:13:32,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 25870 transitions. [2022-07-19 11:13:32,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-07-19 11:13:32,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:32,722 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, 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] [2022-07-19 11:13:32,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 11:13:32,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:32,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1419350507, now seen corresponding path program 1 times [2022-07-19 11:13:32,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508654181] [2022-07-19 11:13:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:32,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 11:13:32,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:32,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508654181] [2022-07-19 11:13:32,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508654181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:32,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:32,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:32,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980657696] [2022-07-19 11:13:32,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:32,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:32,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:32,791 INFO L87 Difference]: Start difference. First operand 22384 states and 25870 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:33,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:33,531 INFO L93 Difference]: Finished difference Result 55756 states and 64725 transitions. [2022-07-19 11:13:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:33,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 213 [2022-07-19 11:13:33,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:33,570 INFO L225 Difference]: With dead ends: 55756 [2022-07-19 11:13:33,570 INFO L226 Difference]: Without dead ends: 33577 [2022-07-19 11:13:33,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:33,589 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:33,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 100 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33577 states. [2022-07-19 11:13:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33577 to 32956. [2022-07-19 11:13:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32956 states, 32955 states have (on average 1.1514489455317858) internal successors, (37946), 32955 states have internal predecessors, (37946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32956 states to 32956 states and 37946 transitions. [2022-07-19 11:13:33,999 INFO L78 Accepts]: Start accepts. Automaton has 32956 states and 37946 transitions. Word has length 213 [2022-07-19 11:13:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:33,999 INFO L495 AbstractCegarLoop]: Abstraction has 32956 states and 37946 transitions. [2022-07-19 11:13:33,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32956 states and 37946 transitions. [2022-07-19 11:13:34,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-07-19 11:13:34,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:34,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:34,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 11:13:34,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:34,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1457404762, now seen corresponding path program 1 times [2022-07-19 11:13:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:34,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32063631] [2022-07-19 11:13:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:34,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-07-19 11:13:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:34,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32063631] [2022-07-19 11:13:34,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32063631] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:34,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:34,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:34,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337195512] [2022-07-19 11:13:34,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:34,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:34,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:34,106 INFO L87 Difference]: Start difference. First operand 32956 states and 37946 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:35,159 INFO L93 Difference]: Finished difference Result 95627 states and 110910 transitions. [2022-07-19 11:13:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:35,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 230 [2022-07-19 11:13:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:35,229 INFO L225 Difference]: With dead ends: 95627 [2022-07-19 11:13:35,230 INFO L226 Difference]: Without dead ends: 63079 [2022-07-19 11:13:35,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:35,252 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 471 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:35,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 472 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:13:35,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63079 states. [2022-07-19 11:13:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63079 to 50459. [2022-07-19 11:13:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50459 states, 50458 states have (on average 1.1502041301676642) internal successors, (58037), 50458 states have internal predecessors, (58037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50459 states to 50459 states and 58037 transitions. [2022-07-19 11:13:35,983 INFO L78 Accepts]: Start accepts. Automaton has 50459 states and 58037 transitions. Word has length 230 [2022-07-19 11:13:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:35,984 INFO L495 AbstractCegarLoop]: Abstraction has 50459 states and 58037 transitions. [2022-07-19 11:13:35,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 50459 states and 58037 transitions. [2022-07-19 11:13:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-07-19 11:13:36,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:36,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:36,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:13:36,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:36,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2026881340, now seen corresponding path program 1 times [2022-07-19 11:13:36,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:36,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556498568] [2022-07-19 11:13:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-19 11:13:36,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:36,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556498568] [2022-07-19 11:13:36,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556498568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:36,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:36,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:36,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782196772] [2022-07-19 11:13:36,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:36,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:36,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:36,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:36,138 INFO L87 Difference]: Start difference. First operand 50459 states and 58037 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:37,087 INFO L93 Difference]: Finished difference Result 134481 states and 155084 transitions. [2022-07-19 11:13:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 295 [2022-07-19 11:13:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:37,204 INFO L225 Difference]: With dead ends: 134481 [2022-07-19 11:13:37,204 INFO L226 Difference]: Without dead ends: 84227 [2022-07-19 11:13:37,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:37,231 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 215 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:37,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 122 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84227 states. [2022-07-19 11:13:38,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84227 to 84220. [2022-07-19 11:13:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84220 states, 84219 states have (on average 1.1496811883304243) internal successors, (96825), 84219 states have internal predecessors, (96825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84220 states to 84220 states and 96825 transitions. [2022-07-19 11:13:38,277 INFO L78 Accepts]: Start accepts. Automaton has 84220 states and 96825 transitions. Word has length 295 [2022-07-19 11:13:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:38,277 INFO L495 AbstractCegarLoop]: Abstraction has 84220 states and 96825 transitions. [2022-07-19 11:13:38,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:38,278 INFO L276 IsEmpty]: Start isEmpty. Operand 84220 states and 96825 transitions. [2022-07-19 11:13:38,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-07-19 11:13:38,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:38,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:38,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 11:13:38,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:38,318 INFO L85 PathProgramCache]: Analyzing trace with hash -679322528, now seen corresponding path program 1 times [2022-07-19 11:13:38,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:38,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755474218] [2022-07-19 11:13:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-07-19 11:13:38,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:38,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755474218] [2022-07-19 11:13:38,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755474218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:38,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:38,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:38,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997660448] [2022-07-19 11:13:38,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:38,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:38,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:38,436 INFO L87 Difference]: Start difference. First operand 84220 states and 96825 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:39,584 INFO L93 Difference]: Finished difference Result 189401 states and 218167 transitions. [2022-07-19 11:13:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:39,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 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 319 [2022-07-19 11:13:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:39,933 INFO L225 Difference]: With dead ends: 189401 [2022-07-19 11:13:39,943 INFO L226 Difference]: Without dead ends: 105386 [2022-07-19 11:13:39,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:39,978 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:39,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 141 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:13:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105386 states. [2022-07-19 11:13:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105386 to 105384. [2022-07-19 11:13:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105384 states, 105383 states have (on average 1.1522826262300372) internal successors, (121431), 105383 states have internal predecessors, (121431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105384 states to 105384 states and 121431 transitions. [2022-07-19 11:13:41,292 INFO L78 Accepts]: Start accepts. Automaton has 105384 states and 121431 transitions. Word has length 319 [2022-07-19 11:13:41,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:41,293 INFO L495 AbstractCegarLoop]: Abstraction has 105384 states and 121431 transitions. [2022-07-19 11:13:41,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 105384 states and 121431 transitions. [2022-07-19 11:13:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-07-19 11:13:41,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:41,585 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 11:13:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 11:13:41,586 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:41,586 INFO L85 PathProgramCache]: Analyzing trace with hash 901370999, now seen corresponding path program 1 times [2022-07-19 11:13:41,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:41,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303395987] [2022-07-19 11:13:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-19 11:13:41,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:41,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303395987] [2022-07-19 11:13:41,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303395987] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:41,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:41,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:41,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001742357] [2022-07-19 11:13:41,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:41,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:41,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:41,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:41,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:41,727 INFO L87 Difference]: Start difference. First operand 105384 states and 121431 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:43,225 INFO L93 Difference]: Finished difference Result 196707 states and 226115 transitions. [2022-07-19 11:13:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 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 323 [2022-07-19 11:13:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:43,372 INFO L225 Difference]: With dead ends: 196707 [2022-07-19 11:13:43,372 INFO L226 Difference]: Without dead ends: 112692 [2022-07-19 11:13:43,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:43,400 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 163 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:43,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 357 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112692 states. [2022-07-19 11:13:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112692 to 111880. [2022-07-19 11:13:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111880 states, 111879 states have (on average 1.1415010859946908) internal successors, (127710), 111879 states have internal predecessors, (127710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111880 states to 111880 states and 127710 transitions. [2022-07-19 11:13:44,907 INFO L78 Accepts]: Start accepts. Automaton has 111880 states and 127710 transitions. Word has length 323 [2022-07-19 11:13:44,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:44,907 INFO L495 AbstractCegarLoop]: Abstraction has 111880 states and 127710 transitions. [2022-07-19 11:13:44,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 111880 states and 127710 transitions. [2022-07-19 11:13:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-07-19 11:13:44,966 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:44,967 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:44,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 11:13:44,967 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:44,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1063126104, now seen corresponding path program 1 times [2022-07-19 11:13:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293547901] [2022-07-19 11:13:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-19 11:13:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293547901] [2022-07-19 11:13:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293547901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:45,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:45,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447761773] [2022-07-19 11:13:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:45,045 INFO L87 Difference]: Start difference. First operand 111880 states and 127710 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:46,403 INFO L93 Difference]: Finished difference Result 228832 states and 260859 transitions. [2022-07-19 11:13:46,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:46,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-07-19 11:13:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:46,577 INFO L225 Difference]: With dead ends: 228832 [2022-07-19 11:13:46,577 INFO L226 Difference]: Without dead ends: 138321 [2022-07-19 11:13:46,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:46,651 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:46,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 134 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:13:46,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138321 states. [2022-07-19 11:13:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138321 to 138316. [2022-07-19 11:13:48,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138316 states, 138315 states have (on average 1.1416043090048078) internal successors, (157901), 138315 states have internal predecessors, (157901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138316 states to 138316 states and 157901 transitions. [2022-07-19 11:13:48,480 INFO L78 Accepts]: Start accepts. Automaton has 138316 states and 157901 transitions. Word has length 330 [2022-07-19 11:13:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:48,481 INFO L495 AbstractCegarLoop]: Abstraction has 138316 states and 157901 transitions. [2022-07-19 11:13:48,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 138316 states and 157901 transitions. [2022-07-19 11:13:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-07-19 11:13:48,865 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:48,865 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 11:13:48,866 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 178796709, now seen corresponding path program 1 times [2022-07-19 11:13:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:48,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017167074] [2022-07-19 11:13:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:48,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 11:13:49,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017167074] [2022-07-19 11:13:49,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017167074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:49,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:49,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:49,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702702905] [2022-07-19 11:13:49,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:49,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:49,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:49,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:49,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:49,018 INFO L87 Difference]: Start difference. First operand 138316 states and 157901 transitions. Second operand has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:50,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:50,340 INFO L93 Difference]: Finished difference Result 228942 states and 261013 transitions. [2022-07-19 11:13:50,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:50,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 338 [2022-07-19 11:13:50,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:50,892 INFO L225 Difference]: With dead ends: 228942 [2022-07-19 11:13:50,892 INFO L226 Difference]: Without dead ends: 138431 [2022-07-19 11:13:50,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:50,950 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 381 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:50,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 78 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:13:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138431 states. [2022-07-19 11:13:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138431 to 136895. [2022-07-19 11:13:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136895 states, 136894 states have (on average 1.1424678948675617) internal successors, (156397), 136894 states have internal predecessors, (156397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136895 states to 136895 states and 156397 transitions. [2022-07-19 11:13:52,721 INFO L78 Accepts]: Start accepts. Automaton has 136895 states and 156397 transitions. Word has length 338 [2022-07-19 11:13:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:52,722 INFO L495 AbstractCegarLoop]: Abstraction has 136895 states and 156397 transitions. [2022-07-19 11:13:52,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.5) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 136895 states and 156397 transitions. [2022-07-19 11:13:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-19 11:13:52,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:52,784 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:52,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 11:13:52,785 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1666657648, now seen corresponding path program 1 times [2022-07-19 11:13:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:52,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873679649] [2022-07-19 11:13:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-19 11:13:53,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873679649] [2022-07-19 11:13:53,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873679649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:53,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742719403] [2022-07-19 11:13:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:53,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:53,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:53,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:13:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-19 11:13:53,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:53,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742719403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:53,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:53,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:13:53,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54316572] [2022-07-19 11:13:53,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:53,528 INFO L87 Difference]: Start difference. First operand 136895 states and 156397 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:54,676 INFO L93 Difference]: Finished difference Result 297131 states and 339473 transitions. [2022-07-19 11:13:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 345 [2022-07-19 11:13:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:55,504 INFO L225 Difference]: With dead ends: 297131 [2022-07-19 11:13:55,504 INFO L226 Difference]: Without dead ends: 160441 [2022-07-19 11:13:55,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:55,553 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 238 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:55,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 128 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160441 states. [2022-07-19 11:13:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160441 to 159827. [2022-07-19 11:13:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159827 states, 159826 states have (on average 1.1344336966451016) internal successors, (181312), 159826 states have internal predecessors, (181312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159827 states to 159827 states and 181312 transitions. [2022-07-19 11:13:58,073 INFO L78 Accepts]: Start accepts. Automaton has 159827 states and 181312 transitions. Word has length 345 [2022-07-19 11:13:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:58,073 INFO L495 AbstractCegarLoop]: Abstraction has 159827 states and 181312 transitions. [2022-07-19 11:13:58,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 159827 states and 181312 transitions. [2022-07-19 11:13:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-07-19 11:13:58,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:58,142 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 11:13:58,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 11:13:58,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 11:13:58,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:58,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash -290618115, now seen corresponding path program 1 times [2022-07-19 11:13:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806067717] [2022-07-19 11:13:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:58,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-19 11:13:58,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:58,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806067717] [2022-07-19 11:13:58,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806067717] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:58,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:58,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:58,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856126738] [2022-07-19 11:13:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:58,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:58,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:58,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:58,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:58,548 INFO L87 Difference]: Start difference. First operand 159827 states and 181312 transitions. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:14:00,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:14:00,512 INFO L93 Difference]: Finished difference Result 348829 states and 396351 transitions. [2022-07-19 11:14:00,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:14:00,513 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 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 349 [2022-07-19 11:14:00,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:14:00,758 INFO L225 Difference]: With dead ends: 348829 [2022-07-19 11:14:00,758 INFO L226 Difference]: Without dead ends: 189207 [2022-07-19 11:14:00,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:14:00,839 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 370 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:14:00,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 92 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:14:01,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189207 states. [2022-07-19 11:14:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189207 to 176320. [2022-07-19 11:14:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176320 states, 176319 states have (on average 1.134455163652244) internal successors, (200026), 176319 states have internal predecessors, (200026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:14:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176320 states to 176320 states and 200026 transitions. [2022-07-19 11:14:03,348 INFO L78 Accepts]: Start accepts. Automaton has 176320 states and 200026 transitions. Word has length 349 [2022-07-19 11:14:03,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:14:03,348 INFO L495 AbstractCegarLoop]: Abstraction has 176320 states and 200026 transitions. [2022-07-19 11:14:03,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:14:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 176320 states and 200026 transitions. [2022-07-19 11:14:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-07-19 11:14:03,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:14:03,427 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 11:14:03,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 11:14:03,428 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:14:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:14:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash 930329166, now seen corresponding path program 1 times [2022-07-19 11:14:03,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:14:03,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900955329] [2022-07-19 11:14:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:14:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:14:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:14:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 11:14:03,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:14:03,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900955329] [2022-07-19 11:14:03,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900955329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:14:03,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:14:03,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:14:03,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223213069] [2022-07-19 11:14:03,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:14:03,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:14:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:14:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:14:03,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:14:03,561 INFO L87 Difference]: Start difference. First operand 176320 states and 200026 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 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) [2022-07-19 11:14:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:14:05,575 INFO L93 Difference]: Finished difference Result 415911 states and 472217 transitions. [2022-07-19 11:14:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:14:05,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 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 369 [2022-07-19 11:14:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:14:05,937 INFO L225 Difference]: With dead ends: 415911 [2022-07-19 11:14:05,938 INFO L226 Difference]: Without dead ends: 239796 [2022-07-19 11:14:06,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:14:06,063 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 208 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:14:06,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 151 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:14:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239796 states. [2022-07-19 11:14:09,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239796 to 239793. [2022-07-19 11:14:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239793 states, 239792 states have (on average 1.1338868686194703) internal successors, (271897), 239792 states have internal predecessors, (271897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:14:09,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239793 states to 239793 states and 271897 transitions. [2022-07-19 11:14:09,654 INFO L78 Accepts]: Start accepts. Automaton has 239793 states and 271897 transitions. Word has length 369 [2022-07-19 11:14:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:14:09,654 INFO L495 AbstractCegarLoop]: Abstraction has 239793 states and 271897 transitions. [2022-07-19 11:14:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 2 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) [2022-07-19 11:14:09,654 INFO L276 IsEmpty]: Start isEmpty. Operand 239793 states and 271897 transitions. [2022-07-19 11:14:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-07-19 11:14:09,781 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:14:09,783 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:14:09,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:14:09,783 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:14:09,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:14:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1072339715, now seen corresponding path program 1 times [2022-07-19 11:14:09,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:14:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565435600] [2022-07-19 11:14:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:14:09,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:14:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:14:09,922 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 171 proven. 6 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 11:14:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:14:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565435600] [2022-07-19 11:14:09,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565435600] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:14:09,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824015582] [2022-07-19 11:14:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:14:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:14:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:14:09,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:14:09,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:14:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:14:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:14:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:14:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 11:14:10,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:14:10,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824015582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:14:10,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:14:10,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:14:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132276796] [2022-07-19 11:14:10,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:14:10,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:14:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:14:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:14:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:14:10,157 INFO L87 Difference]: Start difference. First operand 239793 states and 271897 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:14:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:14:12,416 INFO L93 Difference]: Finished difference Result 470727 states and 533778 transitions. [2022-07-19 11:14:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:14:12,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 376 [2022-07-19 11:14:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:14:12,793 INFO L225 Difference]: With dead ends: 470727 [2022-07-19 11:14:12,793 INFO L226 Difference]: Without dead ends: 231342