./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.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 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:23:55,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:23:55,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:23:55,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:23:55,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:23:55,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:23:55,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:23:55,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:23:55,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:23:55,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:23:55,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:23:55,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:23:55,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:23:55,832 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:23:55,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:23:55,834 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:23:55,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:23:55,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:23:55,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:23:55,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:23:55,839 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:23:55,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:23:55,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:23:55,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:23:55,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:23:55,843 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:23:55,843 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:23:55,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:23:55,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:23:55,845 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:23:55,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:23:55,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:23:55,846 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:23:55,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:23:55,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:23:55,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:23:55,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:23:55,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:23:55,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:23:55,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:23:55,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:23:55,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:23:55,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:23:55,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:23:55,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:23:55,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:23:55,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:23:55,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:23:55,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:23:55,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:23:55,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:23:55,868 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:23:55,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:23:55,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:23:55,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:23:55,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:23:55,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:23:55,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:23:55,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:23:55,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:23:55,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:23:55,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:23:55,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:23:55,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:23:55,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:23:55,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:23:55,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:23:55,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:23:55,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:23:55,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:23:55,881 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:23:55,881 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:23:55,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:23:55,881 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:23:55,881 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:23:55,882 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:23:55,882 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b [2022-07-21 05:23:56,137 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:23:56,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:23:56,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:23:56,158 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:23:56,159 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:23:56,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:56,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d017f5e8f/a82abc77cb334b63a37f6d41b7dd330e/FLAG68d42fe0a [2022-07-21 05:23:56,575 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:23:56,576 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:56,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d017f5e8f/a82abc77cb334b63a37f6d41b7dd330e/FLAG68d42fe0a [2022-07-21 05:23:56,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d017f5e8f/a82abc77cb334b63a37f6d41b7dd330e [2022-07-21 05:23:56,592 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:23:56,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:23:56,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:23:56,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:23:56,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:23:56,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1966eac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56, skipping insertion in model container [2022-07-21 05:23:56,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:23:56,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:23:56,820 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2022-07-21 05:23:56,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:23:56,844 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:23:56,895 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2022-07-21 05:23:56,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:23:56,913 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:23:56,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56 WrapperNode [2022-07-21 05:23:56,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:23:56,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:23:56,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:23:56,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:23:56,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,938 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,973 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2022-07-21 05:23:56,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:23:56,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:23:56,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:23:56,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:23:56,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:56,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:57,004 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:57,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:57,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:57,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:23:57,014 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:23:57,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:23:57,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:23:57,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (1/1) ... [2022-07-21 05:23:57,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:23:57,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:23:57,042 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) [2022-07-21 05:23:57,055 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 [2022-07-21 05:23:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:23:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:23:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:23:57,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:23:57,187 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:23:57,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:23:57,555 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:23:57,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:23:57,560 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 05:23:57,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:23:57 BoogieIcfgContainer [2022-07-21 05:23:57,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:23:57,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:23:57,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:23:57,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:23:57,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:23:56" (1/3) ... [2022-07-21 05:23:57,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7da667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:23:57, skipping insertion in model container [2022-07-21 05:23:57,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:56" (2/3) ... [2022-07-21 05:23:57,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7da667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:23:57, skipping insertion in model container [2022-07-21 05:23:57,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:23:57" (3/3) ... [2022-07-21 05:23:57,567 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:57,580 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:23:57,581 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:23:57,628 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:23:57,635 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@16373c99, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@16076f0f [2022-07-21 05:23:57,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:23:57,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 05:23:57,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:57,645 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] [2022-07-21 05:23:57,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash 233700331, now seen corresponding path program 1 times [2022-07-21 05:23:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187465370] [2022-07-21 05:23:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:57,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187465370] [2022-07-21 05:23:57,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187465370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:57,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:57,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980657018] [2022-07-21 05:23:57,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:57,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:57,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:57,867 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:57,966 INFO L93 Difference]: Finished difference Result 191 states and 307 transitions. [2022-07-21 05:23:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:23:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-07-21 05:23:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:57,978 INFO L225 Difference]: With dead ends: 191 [2022-07-21 05:23:57,978 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 05:23:57,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:23:57,993 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:57,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 05:23:58,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2022-07-21 05:23:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2022-07-21 05:23:58,027 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 25 [2022-07-21 05:23:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,028 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2022-07-21 05:23:58,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2022-07-21 05:23:58,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 05:23:58,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,031 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] [2022-07-21 05:23:58,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:23:58,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,033 INFO L85 PathProgramCache]: Analyzing trace with hash 182027041, now seen corresponding path program 1 times [2022-07-21 05:23:58,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267979527] [2022-07-21 05:23:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267979527] [2022-07-21 05:23:58,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267979527] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661813904] [2022-07-21 05:23:58,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:58,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:58,146 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:58,170 INFO L93 Difference]: Finished difference Result 167 states and 249 transitions. [2022-07-21 05:23:58,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-07-21 05:23:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:58,174 INFO L225 Difference]: With dead ends: 167 [2022-07-21 05:23:58,174 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 05:23:58,178 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 [2022-07-21 05:23:58,179 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:58,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 05:23:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-07-21 05:23:58,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2022-07-21 05:23:58,196 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 41 [2022-07-21 05:23:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,197 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2022-07-21 05:23:58,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2022-07-21 05:23:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 05:23:58,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,201 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] [2022-07-21 05:23:58,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:23:58,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,202 INFO L85 PathProgramCache]: Analyzing trace with hash 54990345, now seen corresponding path program 1 times [2022-07-21 05:23:58,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217910469] [2022-07-21 05:23:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217910469] [2022-07-21 05:23:58,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217910469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486383350] [2022-07-21 05:23:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:58,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:58,246 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:58,259 INFO L93 Difference]: Finished difference Result 269 states and 409 transitions. [2022-07-21 05:23:58,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-07-21 05:23:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:58,261 INFO L225 Difference]: With dead ends: 269 [2022-07-21 05:23:58,261 INFO L226 Difference]: Without dead ends: 179 [2022-07-21 05:23:58,261 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 [2022-07-21 05:23:58,262 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:58,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:58,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-21 05:23:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-07-21 05:23:58,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2022-07-21 05:23:58,272 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 42 [2022-07-21 05:23:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,273 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2022-07-21 05:23:58,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2022-07-21 05:23:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 05:23:58,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,274 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] [2022-07-21 05:23:58,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:23:58,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1508061361, now seen corresponding path program 1 times [2022-07-21 05:23:58,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146353162] [2022-07-21 05:23:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146353162] [2022-07-21 05:23:58,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146353162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:58,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440782993] [2022-07-21 05:23:58,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:58,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:58,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:58,357 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:58,373 INFO L93 Difference]: Finished difference Result 437 states and 666 transitions. [2022-07-21 05:23:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-21 05:23:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:58,375 INFO L225 Difference]: With dead ends: 437 [2022-07-21 05:23:58,375 INFO L226 Difference]: Without dead ends: 283 [2022-07-21 05:23:58,376 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 [2022-07-21 05:23:58,377 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:58,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-21 05:23:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-07-21 05:23:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5) internal successors, (420), 280 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 420 transitions. [2022-07-21 05:23:58,411 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 420 transitions. Word has length 43 [2022-07-21 05:23:58,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,412 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 420 transitions. [2022-07-21 05:23:58,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 420 transitions. [2022-07-21 05:23:58,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 05:23:58,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,414 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] [2022-07-21 05:23:58,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:23:58,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -922713191, now seen corresponding path program 1 times [2022-07-21 05:23:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416698022] [2022-07-21 05:23:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416698022] [2022-07-21 05:23:58,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416698022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:58,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234278327] [2022-07-21 05:23:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:58,494 INFO L87 Difference]: Start difference. First operand 281 states and 420 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:58,558 INFO L93 Difference]: Finished difference Result 1313 states and 2008 transitions. [2022-07-21 05:23:58,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:58,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-21 05:23:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:58,562 INFO L225 Difference]: With dead ends: 1313 [2022-07-21 05:23:58,562 INFO L226 Difference]: Without dead ends: 1055 [2022-07-21 05:23:58,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:23:58,564 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:58,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 551 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-07-21 05:23:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 537. [2022-07-21 05:23:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.492537313432836) internal successors, (800), 536 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2022-07-21 05:23:58,590 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 44 [2022-07-21 05:23:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,590 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2022-07-21 05:23:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2022-07-21 05:23:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 05:23:58,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,592 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] [2022-07-21 05:23:58,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:23:58,592 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1077338731, now seen corresponding path program 1 times [2022-07-21 05:23:58,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765026193] [2022-07-21 05:23:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765026193] [2022-07-21 05:23:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765026193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:58,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455614348] [2022-07-21 05:23:58,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:58,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:58,652 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:58,810 INFO L93 Difference]: Finished difference Result 1911 states and 2843 transitions. [2022-07-21 05:23:58,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-21 05:23:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:58,816 INFO L225 Difference]: With dead ends: 1911 [2022-07-21 05:23:58,831 INFO L226 Difference]: Without dead ends: 1397 [2022-07-21 05:23:58,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:58,833 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 209 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:58,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 294 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:23:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-07-21 05:23:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1393. [2022-07-21 05:23:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.471264367816092) internal successors, (2048), 1392 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2048 transitions. [2022-07-21 05:23:58,925 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2048 transitions. Word has length 45 [2022-07-21 05:23:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,925 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 2048 transitions. [2022-07-21 05:23:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2048 transitions. [2022-07-21 05:23:58,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 05:23:58,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,926 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] [2022-07-21 05:23:58,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:23:58,927 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1270898830, now seen corresponding path program 1 times [2022-07-21 05:23:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98568940] [2022-07-21 05:23:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:58,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98568940] [2022-07-21 05:23:58,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98568940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:58,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593113324] [2022-07-21 05:23:58,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:58,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:58,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:58,975 INFO L87 Difference]: Start difference. First operand 1393 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:59,139 INFO L93 Difference]: Finished difference Result 2955 states and 4265 transitions. [2022-07-21 05:23:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:23:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 05:23:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:59,148 INFO L225 Difference]: With dead ends: 2955 [2022-07-21 05:23:59,149 INFO L226 Difference]: Without dead ends: 2953 [2022-07-21 05:23:59,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:23:59,152 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:59,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 455 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-07-21 05:23:59,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2022-07-21 05:23:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4270833333333333) internal successors, (2192), 1536 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2192 transitions. [2022-07-21 05:23:59,263 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2192 transitions. Word has length 46 [2022-07-21 05:23:59,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:59,264 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 2192 transitions. [2022-07-21 05:23:59,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2192 transitions. [2022-07-21 05:23:59,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 05:23:59,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:59,268 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] [2022-07-21 05:23:59,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:23:59,270 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:59,271 INFO L85 PathProgramCache]: Analyzing trace with hash 795736558, now seen corresponding path program 1 times [2022-07-21 05:23:59,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:59,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330488964] [2022-07-21 05:23:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:59,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:59,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330488964] [2022-07-21 05:23:59,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330488964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:59,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:59,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:59,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143987100] [2022-07-21 05:23:59,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:59,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:59,310 INFO L87 Difference]: Start difference. First operand 1537 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:59,455 INFO L93 Difference]: Finished difference Result 3651 states and 5220 transitions. [2022-07-21 05:23:59,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-21 05:23:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:59,468 INFO L225 Difference]: With dead ends: 3651 [2022-07-21 05:23:59,469 INFO L226 Difference]: Without dead ends: 2137 [2022-07-21 05:23:59,470 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 [2022-07-21 05:23:59,471 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:59,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:59,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-07-21 05:23:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2135. [2022-07-21 05:23:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4198687910028116) internal successors, (3030), 2134 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3030 transitions. [2022-07-21 05:23:59,619 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3030 transitions. Word has length 47 [2022-07-21 05:23:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:59,620 INFO L495 AbstractCegarLoop]: Abstraction has 2135 states and 3030 transitions. [2022-07-21 05:23:59,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3030 transitions. [2022-07-21 05:23:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:23:59,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:59,622 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:23:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 05:23:59,622 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1282796535, now seen corresponding path program 1 times [2022-07-21 05:23:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844256474] [2022-07-21 05:23:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844256474] [2022-07-21 05:23:59,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844256474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:23:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621601109] [2022-07-21 05:23:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:59,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:23:59,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:23:59,686 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) [2022-07-21 05:23:59,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:23:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 05:23:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:23:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:59,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:00,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621601109] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:00,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:00,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-07-21 05:24:00,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836844102] [2022-07-21 05:24:00,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:00,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 05:24:00,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:00,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 05:24:00,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:24:00,224 INFO L87 Difference]: Start difference. First operand 2135 states and 3030 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:00,514 INFO L93 Difference]: Finished difference Result 6595 states and 9454 transitions. [2022-07-21 05:24:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:24:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 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 66 [2022-07-21 05:24:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:00,528 INFO L225 Difference]: With dead ends: 6595 [2022-07-21 05:24:00,528 INFO L226 Difference]: Without dead ends: 5081 [2022-07-21 05:24:00,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:00,534 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 413 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:00,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2022-07-21 05:24:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4831. [2022-07-21 05:24:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4140786749482401) internal successors, (6830), 4830 states have internal predecessors, (6830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6830 transitions. [2022-07-21 05:24:00,791 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6830 transitions. Word has length 66 [2022-07-21 05:24:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:00,791 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 6830 transitions. [2022-07-21 05:24:00,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6830 transitions. [2022-07-21 05:24:00,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:24:00,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:00,793 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:00,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 05:24:01,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:01,008 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:01,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1183086589, now seen corresponding path program 1 times [2022-07-21 05:24:01,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:01,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522042295] [2022-07-21 05:24:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:01,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:01,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:01,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522042295] [2022-07-21 05:24:01,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522042295] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:01,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:01,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:01,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452301955] [2022-07-21 05:24:01,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:01,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:01,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:01,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:01,049 INFO L87 Difference]: Start difference. First operand 4831 states and 6830 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:01,435 INFO L93 Difference]: Finished difference Result 11235 states and 15832 transitions. [2022-07-21 05:24:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 05:24:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:01,467 INFO L225 Difference]: With dead ends: 11235 [2022-07-21 05:24:01,467 INFO L226 Difference]: Without dead ends: 7825 [2022-07-21 05:24:01,509 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 [2022-07-21 05:24:01,510 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:01,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2022-07-21 05:24:01,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2022-07-21 05:24:01,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.3891587829199694) internal successors, (10866), 7822 states have internal predecessors, (10866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 10866 transitions. [2022-07-21 05:24:01,925 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 10866 transitions. Word has length 67 [2022-07-21 05:24:01,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:01,925 INFO L495 AbstractCegarLoop]: Abstraction has 7823 states and 10866 transitions. [2022-07-21 05:24:01,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:01,926 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 10866 transitions. [2022-07-21 05:24:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:24:01,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:01,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:01,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 05:24:01,929 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash -297371507, now seen corresponding path program 1 times [2022-07-21 05:24:01,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:01,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110274312] [2022-07-21 05:24:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:24:01,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:01,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110274312] [2022-07-21 05:24:01,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110274312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:01,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:01,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:01,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919687063] [2022-07-21 05:24:01,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:01,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:24:01,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:01,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:24:01,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:24:01,970 INFO L87 Difference]: Start difference. First operand 7823 states and 10866 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:02,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:02,452 INFO L93 Difference]: Finished difference Result 15327 states and 21392 transitions. [2022-07-21 05:24:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:24:02,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-07-21 05:24:02,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:02,482 INFO L225 Difference]: With dead ends: 15327 [2022-07-21 05:24:02,483 INFO L226 Difference]: Without dead ends: 11957 [2022-07-21 05:24:02,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:24:02,489 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:02,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 486 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11957 states. [2022-07-21 05:24:02,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11957 to 10593. [2022-07-21 05:24:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 1.3834969788519638) internal successors, (14654), 10592 states have internal predecessors, (14654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14654 transitions. [2022-07-21 05:24:03,040 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14654 transitions. Word has length 67 [2022-07-21 05:24:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:03,041 INFO L495 AbstractCegarLoop]: Abstraction has 10593 states and 14654 transitions. [2022-07-21 05:24:03,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14654 transitions. [2022-07-21 05:24:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:24:03,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:03,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:03,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 05:24:03,044 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash 129974557, now seen corresponding path program 1 times [2022-07-21 05:24:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500616144] [2022-07-21 05:24:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:03,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:03,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500616144] [2022-07-21 05:24:03,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500616144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:03,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:03,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:03,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985262169] [2022-07-21 05:24:03,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:03,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:03,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:03,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:03,067 INFO L87 Difference]: Start difference. First operand 10593 states and 14654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:03,491 INFO L93 Difference]: Finished difference Result 18149 states and 24986 transitions. [2022-07-21 05:24:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-21 05:24:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:03,509 INFO L225 Difference]: With dead ends: 18149 [2022-07-21 05:24:03,509 INFO L226 Difference]: Without dead ends: 11113 [2022-07-21 05:24:03,518 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 [2022-07-21 05:24:03,519 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:03,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2022-07-21 05:24:03,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10664. [2022-07-21 05:24:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 10663 states have (on average 1.3522460845915782) internal successors, (14419), 10663 states have internal predecessors, (14419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14419 transitions. [2022-07-21 05:24:03,947 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14419 transitions. Word has length 67 [2022-07-21 05:24:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:03,948 INFO L495 AbstractCegarLoop]: Abstraction has 10664 states and 14419 transitions. [2022-07-21 05:24:03,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14419 transitions. [2022-07-21 05:24:03,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:24:03,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:03,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:03,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:24:03,950 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:03,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:03,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1562240835, now seen corresponding path program 1 times [2022-07-21 05:24:03,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384884372] [2022-07-21 05:24:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:03,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:24:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384884372] [2022-07-21 05:24:03,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384884372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:03,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:03,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080630468] [2022-07-21 05:24:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:24:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:24:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:24:03,984 INFO L87 Difference]: Start difference. First operand 10664 states and 14419 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:04,506 INFO L93 Difference]: Finished difference Result 15411 states and 21048 transitions. [2022-07-21 05:24:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:24:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 67 [2022-07-21 05:24:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:04,531 INFO L225 Difference]: With dead ends: 15411 [2022-07-21 05:24:04,532 INFO L226 Difference]: Without dead ends: 13669 [2022-07-21 05:24:04,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:24:04,539 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 286 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:04,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 482 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:04,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2022-07-21 05:24:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 12284. [2022-07-21 05:24:05,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 1.3543108361149556) internal successors, (16635), 12283 states have internal predecessors, (16635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 16635 transitions. [2022-07-21 05:24:05,364 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 16635 transitions. Word has length 67 [2022-07-21 05:24:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:05,364 INFO L495 AbstractCegarLoop]: Abstraction has 12284 states and 16635 transitions. [2022-07-21 05:24:05,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:05,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 16635 transitions. [2022-07-21 05:24:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:24:05,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:05,372 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 05:24:05,373 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2062316443, now seen corresponding path program 1 times [2022-07-21 05:24:05,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094184504] [2022-07-21 05:24:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:05,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:24:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094184504] [2022-07-21 05:24:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094184504] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:05,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268697228] [2022-07-21 05:24:05,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:05,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:24:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:05,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:24:05,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:24:05,427 INFO L87 Difference]: Start difference. First operand 12284 states and 16635 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:06,051 INFO L93 Difference]: Finished difference Result 19196 states and 26179 transitions. [2022-07-21 05:24:06,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:24:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 67 [2022-07-21 05:24:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:06,091 INFO L225 Difference]: With dead ends: 19196 [2022-07-21 05:24:06,091 INFO L226 Difference]: Without dead ends: 16092 [2022-07-21 05:24:06,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:24:06,102 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 281 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:06,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2022-07-21 05:24:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 14696. [2022-07-21 05:24:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14696 states, 14695 states have (on average 1.350187138482477) internal successors, (19841), 14695 states have internal predecessors, (19841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:06,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14696 states to 14696 states and 19841 transitions. [2022-07-21 05:24:06,817 INFO L78 Accepts]: Start accepts. Automaton has 14696 states and 19841 transitions. Word has length 67 [2022-07-21 05:24:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:06,817 INFO L495 AbstractCegarLoop]: Abstraction has 14696 states and 19841 transitions. [2022-07-21 05:24:06,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:06,817 INFO L276 IsEmpty]: Start isEmpty. Operand 14696 states and 19841 transitions. [2022-07-21 05:24:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 05:24:06,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:06,820 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 05:24:06,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:06,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash -762122981, now seen corresponding path program 1 times [2022-07-21 05:24:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:06,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129769885] [2022-07-21 05:24:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:06,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129769885] [2022-07-21 05:24:06,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129769885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:06,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:06,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:06,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672660496] [2022-07-21 05:24:06,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:06,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:06,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:06,852 INFO L87 Difference]: Start difference. First operand 14696 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:07,629 INFO L93 Difference]: Finished difference Result 35614 states and 47892 transitions. [2022-07-21 05:24:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:07,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-07-21 05:24:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:07,657 INFO L225 Difference]: With dead ends: 35614 [2022-07-21 05:24:07,657 INFO L226 Difference]: Without dead ends: 21860 [2022-07-21 05:24:07,670 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 [2022-07-21 05:24:07,671 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 50 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:07,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 246 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2022-07-21 05:24:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21198. [2022-07-21 05:24:08,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21197 states have (on average 1.3274519979242345) internal successors, (28138), 21197 states have internal predecessors, (28138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 28138 transitions. [2022-07-21 05:24:08,671 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 28138 transitions. Word has length 70 [2022-07-21 05:24:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:08,671 INFO L495 AbstractCegarLoop]: Abstraction has 21198 states and 28138 transitions. [2022-07-21 05:24:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:08,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 28138 transitions. [2022-07-21 05:24:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:08,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:08,675 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:08,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 05:24:08,676 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash -624325544, now seen corresponding path program 1 times [2022-07-21 05:24:08,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:08,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388268890] [2022-07-21 05:24:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:08,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:08,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388268890] [2022-07-21 05:24:08,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388268890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:08,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016577182] [2022-07-21 05:24:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:08,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:08,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:08,720 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) [2022-07-21 05:24:08,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:24:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:08,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:08,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:08,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016577182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:08,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:08,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:08,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057715938] [2022-07-21 05:24:08,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:08,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:08,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:08,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:08,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:08,981 INFO L87 Difference]: Start difference. First operand 21198 states and 28138 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:11,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:11,916 INFO L93 Difference]: Finished difference Result 64966 states and 86142 transitions. [2022-07-21 05:24:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:11,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:12,011 INFO L225 Difference]: With dead ends: 64966 [2022-07-21 05:24:12,012 INFO L226 Difference]: Without dead ends: 47852 [2022-07-21 05:24:12,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:12,044 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1393 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:12,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 369 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47852 states. [2022-07-21 05:24:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47852 to 24863. [2022-07-21 05:24:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 24862 states have (on average 1.3303837181240448) internal successors, (33076), 24862 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 33076 transitions. [2022-07-21 05:24:13,762 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 33076 transitions. Word has length 71 [2022-07-21 05:24:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:13,763 INFO L495 AbstractCegarLoop]: Abstraction has 24863 states and 33076 transitions. [2022-07-21 05:24:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 33076 transitions. [2022-07-21 05:24:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:13,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:13,768 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:13,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-21 05:24:13,981 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,SelfDestructingSolverStorable15 [2022-07-21 05:24:13,982 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash -2058940762, now seen corresponding path program 1 times [2022-07-21 05:24:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669838516] [2022-07-21 05:24:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:13,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:14,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:24:14,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669838516] [2022-07-21 05:24:14,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669838516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:14,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:14,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:14,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885900066] [2022-07-21 05:24:14,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:14,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:14,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:14,029 INFO L87 Difference]: Start difference. First operand 24863 states and 33076 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:16,376 INFO L93 Difference]: Finished difference Result 61430 states and 81709 transitions. [2022-07-21 05:24:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:16,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:16,429 INFO L225 Difference]: With dead ends: 61430 [2022-07-21 05:24:16,429 INFO L226 Difference]: Without dead ends: 36606 [2022-07-21 05:24:16,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:24:16,450 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 519 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:16,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 200 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:16,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36606 states. [2022-07-21 05:24:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36606 to 33398. [2022-07-21 05:24:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33398 states, 33397 states have (on average 1.3117046441297122) internal successors, (43807), 33397 states have internal predecessors, (43807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:18,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33398 states to 33398 states and 43807 transitions. [2022-07-21 05:24:18,941 INFO L78 Accepts]: Start accepts. Automaton has 33398 states and 43807 transitions. Word has length 71 [2022-07-21 05:24:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:18,942 INFO L495 AbstractCegarLoop]: Abstraction has 33398 states and 43807 transitions. [2022-07-21 05:24:18,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 33398 states and 43807 transitions. [2022-07-21 05:24:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:18,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:18,947 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:18,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 05:24:18,947 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:18,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540196, now seen corresponding path program 1 times [2022-07-21 05:24:18,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:18,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543933132] [2022-07-21 05:24:18,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:18,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:18,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543933132] [2022-07-21 05:24:18,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543933132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355257843] [2022-07-21 05:24:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:18,988 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) [2022-07-21 05:24:18,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:24:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:19,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:19,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355257843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:19,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:19,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:19,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589375093] [2022-07-21 05:24:19,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:19,260 INFO L87 Difference]: Start difference. First operand 33398 states and 43807 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:22,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:22,012 INFO L93 Difference]: Finished difference Result 72462 states and 94424 transitions. [2022-07-21 05:24:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:22,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:22,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:22,072 INFO L225 Difference]: With dead ends: 72462 [2022-07-21 05:24:22,073 INFO L226 Difference]: Without dead ends: 45957 [2022-07-21 05:24:22,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:22,099 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 852 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:22,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 351 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:22,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45957 states. [2022-07-21 05:24:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45957 to 33893. [2022-07-21 05:24:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33893 states, 33892 states have (on average 1.3054113065030095) internal successors, (44243), 33892 states have internal predecessors, (44243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33893 states to 33893 states and 44243 transitions. [2022-07-21 05:24:24,567 INFO L78 Accepts]: Start accepts. Automaton has 33893 states and 44243 transitions. Word has length 71 [2022-07-21 05:24:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:24,567 INFO L495 AbstractCegarLoop]: Abstraction has 33893 states and 44243 transitions. [2022-07-21 05:24:24,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 33893 states and 44243 transitions. [2022-07-21 05:24:24,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:24,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:24,572 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 05:24:24,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 05:24:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 05:24:24,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -85511602, now seen corresponding path program 1 times [2022-07-21 05:24:24,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:24,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164193857] [2022-07-21 05:24:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164193857] [2022-07-21 05:24:24,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164193857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503705540] [2022-07-21 05:24:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:24,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:24,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:24,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:24:24,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:24:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:24,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:25,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:25,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503705540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:25,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:25,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:25,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655584902] [2022-07-21 05:24:25,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:25,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:25,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:25,200 INFO L87 Difference]: Start difference. First operand 33893 states and 44243 transitions. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:29,963 INFO L93 Difference]: Finished difference Result 89058 states and 116006 transitions. [2022-07-21 05:24:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-21 05:24:29,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:30,068 INFO L225 Difference]: With dead ends: 89058 [2022-07-21 05:24:30,069 INFO L226 Difference]: Without dead ends: 66760 [2022-07-21 05:24:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:30,096 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 777 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:30,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 410 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66760 states. [2022-07-21 05:24:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66760 to 39289. [2022-07-21 05:24:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39289 states, 39288 states have (on average 1.3065058032987171) internal successors, (51330), 39288 states have internal predecessors, (51330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 51330 transitions. [2022-07-21 05:24:33,302 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 51330 transitions. Word has length 71 [2022-07-21 05:24:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:33,302 INFO L495 AbstractCegarLoop]: Abstraction has 39289 states and 51330 transitions. [2022-07-21 05:24:33,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 51330 transitions. [2022-07-21 05:24:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 05:24:33,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:33,308 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:33,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 05:24:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:33,526 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 2029316117, now seen corresponding path program 1 times [2022-07-21 05:24:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:33,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204722731] [2022-07-21 05:24:33,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:33,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:33,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:33,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204722731] [2022-07-21 05:24:33,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204722731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:33,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576388850] [2022-07-21 05:24:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:33,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:33,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:33,660 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:24:33,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:24:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 05:24:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:34,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:35,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576388850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:35,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:35,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 30 [2022-07-21 05:24:35,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088042667] [2022-07-21 05:24:35,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 05:24:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 05:24:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-07-21 05:24:35,010 INFO L87 Difference]: Start difference. First operand 39289 states and 51330 transitions. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)