./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label13.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 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:52:40,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:52:40,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:52:40,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:52:40,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:52:40,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:52:40,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:52:40,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:52:40,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:52:40,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:52:40,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:52:40,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:52:40,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:52:40,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:52:40,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:52:40,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:52:40,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:52:40,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:52:40,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:52:40,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:52:40,777 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:52:40,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:52:40,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:52:40,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:52:40,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:52:40,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:52:40,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:52:40,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:52:40,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:52:40,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:52:40,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:52:40,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:52:40,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:52:40,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:52:40,790 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:52:40,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:52:40,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:52:40,792 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:52:40,792 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:52:40,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:52:40,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:52:40,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:52:40,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:52:40,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:52:40,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:52:40,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:52:40,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:52:40,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:52:40,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:52:40,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:52:40,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:52:40,822 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:52:40,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:52:40,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:52:40,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:52:40,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:52:40,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:52:40,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:52:40,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:52:40,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:52:40,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:52:40,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:52:40,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:52:40,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:52:40,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:52:40,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:52:40,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:52:40,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:52:40,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:52:40,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:52:40,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:52:40,827 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:52:40,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:52:40,827 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:52:40,827 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:52:40,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:52:40,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84be5ebe7d0e17b7dfbf14426aab6d066d24416ef8e3b409c38a918132f4bf30 [2022-07-22 12:52:41,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:52:41,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:52:41,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:52:41,077 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:52:41,078 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:52:41,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2022-07-22 12:52:41,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e74dd58/c7e9986af21645f69567d7ac4f9598b8/FLAG6b15fd952 [2022-07-22 12:52:41,706 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:52:41,707 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label13.c [2022-07-22 12:52:41,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e74dd58/c7e9986af21645f69567d7ac4f9598b8/FLAG6b15fd952 [2022-07-22 12:52:42,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e74dd58/c7e9986af21645f69567d7ac4f9598b8 [2022-07-22 12:52:42,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:52:42,200 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:52:42,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:52:42,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:52:42,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:52:42,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:52:42" (1/1) ... [2022-07-22 12:52:42,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2e773d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:42, skipping insertion in model container [2022-07-22 12:52:42,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:52:42" (1/1) ... [2022-07-22 12:52:42,209 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:52:42,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:52:42,439 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label13.c[4647,4660] [2022-07-22 12:52:42,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:52:42,922 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:52:42,955 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label13.c[4647,4660] [2022-07-22 12:52:43,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:52:43,141 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:52:43,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43 WrapperNode [2022-07-22 12:52:43,142 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:52:43,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:52:43,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:52:43,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:52:43,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,375 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-22 12:52:43,375 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:52:43,376 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:52:43,376 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:52:43,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:52:43,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,523 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:52:43,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:52:43,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:52:43,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:52:43,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (1/1) ... [2022-07-22 12:52:43,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:52:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:43,636 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) [2022-07-22 12:52:43,677 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 [2022-07-22 12:52:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:52:43,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:52:43,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:52:43,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:52:43,762 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:52:43,763 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:52:46,115 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:52:46,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:52:46,124 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:52:46,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:52:46 BoogieIcfgContainer [2022-07-22 12:52:46,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:52:46,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:52:46,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:52:46,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:52:46,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:52:42" (1/3) ... [2022-07-22 12:52:46,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6a02d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:52:46, skipping insertion in model container [2022-07-22 12:52:46,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:43" (2/3) ... [2022-07-22 12:52:46,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6a02d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:52:46, skipping insertion in model container [2022-07-22 12:52:46,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:52:46" (3/3) ... [2022-07-22 12:52:46,132 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label13.c [2022-07-22 12:52:46,142 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:52:46,142 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:52:46,182 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:52:46,187 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@3e438a1b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@119cb0b6 [2022-07-22 12:52:46,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:52:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:46,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 12:52:46,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:46,198 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] [2022-07-22 12:52:46,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:46,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1722039382, now seen corresponding path program 1 times [2022-07-22 12:52:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:46,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310989384] [2022-07-22 12:52:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:46,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:46,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:46,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310989384] [2022-07-22 12:52:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310989384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:46,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:46,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774302194] [2022-07-22 12:52:46,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:46,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:46,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:46,365 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:48,556 INFO L93 Difference]: Finished difference Result 1667 states and 3061 transitions. [2022-07-22 12:52:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-07-22 12:52:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:48,590 INFO L225 Difference]: With dead ends: 1667 [2022-07-22 12:52:48,590 INFO L226 Difference]: Without dead ends: 998 [2022-07-22 12:52:48,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:48,603 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 515 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:48,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 276 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:52:48,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-07-22 12:52:48,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 982. [2022-07-22 12:52:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 1.707441386340469) internal successors, (1675), 981 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1675 transitions. [2022-07-22 12:52:48,739 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1675 transitions. Word has length 30 [2022-07-22 12:52:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:48,740 INFO L495 AbstractCegarLoop]: Abstraction has 982 states and 1675 transitions. [2022-07-22 12:52:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1675 transitions. [2022-07-22 12:52:48,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 12:52:48,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:48,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:52:48,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:48,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:48,743 INFO L85 PathProgramCache]: Analyzing trace with hash 673698151, now seen corresponding path program 1 times [2022-07-22 12:52:48,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:48,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783705043] [2022-07-22 12:52:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:48,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:48,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783705043] [2022-07-22 12:52:48,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783705043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:48,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:48,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:48,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169598916] [2022-07-22 12:52:48,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:48,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:48,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:48,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:48,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:48,857 INFO L87 Difference]: Start difference. First operand 982 states and 1675 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:50,670 INFO L93 Difference]: Finished difference Result 2841 states and 4881 transitions. [2022-07-22 12:52:50,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-07-22 12:52:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:50,676 INFO L225 Difference]: With dead ends: 2841 [2022-07-22 12:52:50,676 INFO L226 Difference]: Without dead ends: 1861 [2022-07-22 12:52:50,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:50,678 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:50,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 496 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1340 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:52:50,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2022-07-22 12:52:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1857. [2022-07-22 12:52:50,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.4547413793103448) internal successors, (2700), 1856 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2700 transitions. [2022-07-22 12:52:50,710 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2700 transitions. Word has length 95 [2022-07-22 12:52:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:50,711 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2700 transitions. [2022-07-22 12:52:50,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2700 transitions. [2022-07-22 12:52:50,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 12:52:50,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:50,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:50,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:52:50,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:50,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:50,716 INFO L85 PathProgramCache]: Analyzing trace with hash -2095642724, now seen corresponding path program 1 times [2022-07-22 12:52:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:50,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353498010] [2022-07-22 12:52:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353498010] [2022-07-22 12:52:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353498010] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:50,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:50,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988329970] [2022-07-22 12:52:50,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:50,919 INFO L87 Difference]: Start difference. First operand 1857 states and 2700 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:53,074 INFO L93 Difference]: Finished difference Result 4591 states and 6640 transitions. [2022-07-22 12:52:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2022-07-22 12:52:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:53,084 INFO L225 Difference]: With dead ends: 4591 [2022-07-22 12:52:53,085 INFO L226 Difference]: Without dead ends: 2736 [2022-07-22 12:52:53,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:53,094 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:53,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:52:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2022-07-22 12:52:53,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2022-07-22 12:52:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 1.390791896869245) internal successors, (3776), 2715 states have internal predecessors, (3776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 3776 transitions. [2022-07-22 12:52:53,135 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 3776 transitions. Word has length 135 [2022-07-22 12:52:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:53,137 INFO L495 AbstractCegarLoop]: Abstraction has 2716 states and 3776 transitions. [2022-07-22 12:52:53,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 3776 transitions. [2022-07-22 12:52:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-22 12:52:53,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:53,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:53,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:52:53,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:53,151 INFO L85 PathProgramCache]: Analyzing trace with hash -767813459, now seen corresponding path program 1 times [2022-07-22 12:52:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:53,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520596856] [2022-07-22 12:52:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:53,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:53,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520596856] [2022-07-22 12:52:53,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520596856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:53,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:53,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715409804] [2022-07-22 12:52:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:53,268 INFO L87 Difference]: Start difference. First operand 2716 states and 3776 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:54,899 INFO L93 Difference]: Finished difference Result 6709 states and 9429 transitions. [2022-07-22 12:52:54,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:54,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2022-07-22 12:52:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:54,911 INFO L225 Difference]: With dead ends: 6709 [2022-07-22 12:52:54,911 INFO L226 Difference]: Without dead ends: 3995 [2022-07-22 12:52:54,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:54,915 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 347 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:54,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:52:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2022-07-22 12:52:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3142. [2022-07-22 12:52:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3142 states, 3141 states have (on average 1.274434893346068) internal successors, (4003), 3141 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3142 states to 3142 states and 4003 transitions. [2022-07-22 12:52:54,949 INFO L78 Accepts]: Start accepts. Automaton has 3142 states and 4003 transitions. Word has length 141 [2022-07-22 12:52:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:54,950 INFO L495 AbstractCegarLoop]: Abstraction has 3142 states and 4003 transitions. [2022-07-22 12:52:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 2 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3142 states and 4003 transitions. [2022-07-22 12:52:54,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-22 12:52:54,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:54,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:52:54,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash -513035753, now seen corresponding path program 1 times [2022-07-22 12:52:54,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:54,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299829142] [2022-07-22 12:52:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:55,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299829142] [2022-07-22 12:52:55,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299829142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:55,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:55,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 12:52:55,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844105995] [2022-07-22 12:52:55,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:55,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:52:55,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:52:55,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:52:55,038 INFO L87 Difference]: Start difference. First operand 3142 states and 4003 transitions. Second operand has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:57,309 INFO L93 Difference]: Finished difference Result 8019 states and 10522 transitions. [2022-07-22 12:52:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:57,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 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 178 [2022-07-22 12:52:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:57,321 INFO L225 Difference]: With dead ends: 8019 [2022-07-22 12:52:57,321 INFO L226 Difference]: Without dead ends: 4879 [2022-07-22 12:52:57,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:52:57,324 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 1096 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1990 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 1990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:57,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 881 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 1990 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 12:52:57,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2022-07-22 12:52:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4852. [2022-07-22 12:52:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4852 states, 4851 states have (on average 1.2665429808286952) internal successors, (6144), 4851 states have internal predecessors, (6144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4852 states to 4852 states and 6144 transitions. [2022-07-22 12:52:57,384 INFO L78 Accepts]: Start accepts. Automaton has 4852 states and 6144 transitions. Word has length 178 [2022-07-22 12:52:57,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:57,385 INFO L495 AbstractCegarLoop]: Abstraction has 4852 states and 6144 transitions. [2022-07-22 12:52:57,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.6) internal successors, (178), 5 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4852 states and 6144 transitions. [2022-07-22 12:52:57,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-22 12:52:57,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:57,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:57,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:52:57,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash 185887176, now seen corresponding path program 1 times [2022-07-22 12:52:57,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:57,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477975824] [2022-07-22 12:52:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:52:57,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:57,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477975824] [2022-07-22 12:52:57,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477975824] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:57,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:57,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:57,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938599527] [2022-07-22 12:52:57,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:57,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:57,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:57,450 INFO L87 Difference]: Start difference. First operand 4852 states and 6144 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:59,292 INFO L93 Difference]: Finished difference Result 12249 states and 15825 transitions. [2022-07-22 12:52:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 184 [2022-07-22 12:52:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:59,309 INFO L225 Difference]: With dead ends: 12249 [2022-07-22 12:52:59,310 INFO L226 Difference]: Without dead ends: 7399 [2022-07-22 12:52:59,342 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 [2022-07-22 12:52:59,343 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 418 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:59,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 545 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:52:59,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7399 states. [2022-07-22 12:52:59,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7399 to 4826. [2022-07-22 12:52:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4825 states have (on average 1.2652849740932643) internal successors, (6105), 4825 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 6105 transitions. [2022-07-22 12:52:59,396 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 6105 transitions. Word has length 184 [2022-07-22 12:52:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:59,396 INFO L495 AbstractCegarLoop]: Abstraction has 4826 states and 6105 transitions. [2022-07-22 12:52:59,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 6105 transitions. [2022-07-22 12:52:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-22 12:52:59,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:59,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:52:59,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 416641564, now seen corresponding path program 1 times [2022-07-22 12:52:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970978250] [2022-07-22 12:52:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:59,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:59,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970978250] [2022-07-22 12:52:59,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970978250] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:59,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:59,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:59,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234760965] [2022-07-22 12:52:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:59,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:59,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:59,474 INFO L87 Difference]: Start difference. First operand 4826 states and 6105 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:01,343 INFO L93 Difference]: Finished difference Result 13486 states and 17137 transitions. [2022-07-22 12:53:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:01,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 197 [2022-07-22 12:53:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:01,360 INFO L225 Difference]: With dead ends: 13486 [2022-07-22 12:53:01,360 INFO L226 Difference]: Without dead ends: 7355 [2022-07-22 12:53:01,366 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 [2022-07-22 12:53:01,367 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 563 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:01,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 635 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 1277 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:53:01,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7355 states. [2022-07-22 12:53:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7355 to 6499. [2022-07-22 12:53:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6498 states have (on average 1.1871345029239766) internal successors, (7714), 6498 states have internal predecessors, (7714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 7714 transitions. [2022-07-22 12:53:01,436 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 7714 transitions. Word has length 197 [2022-07-22 12:53:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:01,437 INFO L495 AbstractCegarLoop]: Abstraction has 6499 states and 7714 transitions. [2022-07-22 12:53:01,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 7714 transitions. [2022-07-22 12:53:01,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-07-22 12:53:01,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:01,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:01,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:53:01,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2139731954, now seen corresponding path program 1 times [2022-07-22 12:53:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:01,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84856825] [2022-07-22 12:53:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:01,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:01,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:01,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84856825] [2022-07-22 12:53:01,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84856825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:01,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:01,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:01,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158833268] [2022-07-22 12:53:01,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:01,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:01,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:01,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:01,594 INFO L87 Difference]: Start difference. First operand 6499 states and 7714 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:03,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:03,010 INFO L93 Difference]: Finished difference Result 14278 states and 16920 transitions. [2022-07-22 12:53:03,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:03,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 250 [2022-07-22 12:53:03,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:03,021 INFO L225 Difference]: With dead ends: 14278 [2022-07-22 12:53:03,021 INFO L226 Difference]: Without dead ends: 7781 [2022-07-22 12:53:03,026 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 [2022-07-22 12:53:03,026 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 406 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:03,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 812 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2022-07-22 12:53:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 7351. [2022-07-22 12:53:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7351 states, 7350 states have (on average 1.1794557823129252) internal successors, (8669), 7350 states have internal predecessors, (8669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7351 states to 7351 states and 8669 transitions. [2022-07-22 12:53:03,088 INFO L78 Accepts]: Start accepts. Automaton has 7351 states and 8669 transitions. Word has length 250 [2022-07-22 12:53:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:03,089 INFO L495 AbstractCegarLoop]: Abstraction has 7351 states and 8669 transitions. [2022-07-22 12:53:03,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7351 states and 8669 transitions. [2022-07-22 12:53:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-07-22 12:53:03,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:03,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:03,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:53:03,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1207693812, now seen corresponding path program 1 times [2022-07-22 12:53:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390659372] [2022-07-22 12:53:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:03,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:03,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390659372] [2022-07-22 12:53:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390659372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:03,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:03,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036688217] [2022-07-22 12:53:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:03,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:03,176 INFO L87 Difference]: Start difference. First operand 7351 states and 8669 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:04,530 INFO L93 Difference]: Finished difference Result 18527 states and 21831 transitions. [2022-07-22 12:53:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 268 [2022-07-22 12:53:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:04,544 INFO L225 Difference]: With dead ends: 18527 [2022-07-22 12:53:04,545 INFO L226 Difference]: Without dead ends: 11178 [2022-07-22 12:53:04,551 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 [2022-07-22 12:53:04,551 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 436 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:04,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 336 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:53:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11178 states. [2022-07-22 12:53:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11178 to 9900. [2022-07-22 12:53:04,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9900 states, 9899 states have (on average 1.1641579957571473) internal successors, (11524), 9899 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9900 states to 9900 states and 11524 transitions. [2022-07-22 12:53:04,669 INFO L78 Accepts]: Start accepts. Automaton has 9900 states and 11524 transitions. Word has length 268 [2022-07-22 12:53:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:04,670 INFO L495 AbstractCegarLoop]: Abstraction has 9900 states and 11524 transitions. [2022-07-22 12:53:04,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9900 states and 11524 transitions. [2022-07-22 12:53:04,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-22 12:53:04,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:04,673 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:04,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:53:04,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1810738291, now seen corresponding path program 1 times [2022-07-22 12:53:04,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:04,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242280209] [2022-07-22 12:53:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:04,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 226 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242280209] [2022-07-22 12:53:04,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242280209] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:04,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:04,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:53:04,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731040968] [2022-07-22 12:53:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:04,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:04,798 INFO L87 Difference]: Start difference. First operand 9900 states and 11524 transitions. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:07,261 INFO L93 Difference]: Finished difference Result 31342 states and 36568 transitions. [2022-07-22 12:53:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2022-07-22 12:53:07,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:07,287 INFO L225 Difference]: With dead ends: 31342 [2022-07-22 12:53:07,288 INFO L226 Difference]: Without dead ends: 20165 [2022-07-22 12:53:07,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:07,299 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 873 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:07,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 241 Invalid, 2900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:53:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20165 states. [2022-07-22 12:53:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20165 to 18858. [2022-07-22 12:53:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18858 states, 18857 states have (on average 1.1585087765816409) internal successors, (21846), 18857 states have internal predecessors, (21846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:07,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18858 states to 18858 states and 21846 transitions. [2022-07-22 12:53:07,541 INFO L78 Accepts]: Start accepts. Automaton has 18858 states and 21846 transitions. Word has length 290 [2022-07-22 12:53:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:07,541 INFO L495 AbstractCegarLoop]: Abstraction has 18858 states and 21846 transitions. [2022-07-22 12:53:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 18858 states and 21846 transitions. [2022-07-22 12:53:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-07-22 12:53:07,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:07,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:53:07,549 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1792169996, now seen corresponding path program 1 times [2022-07-22 12:53:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643536937] [2022-07-22 12:53:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 198 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:07,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643536937] [2022-07-22 12:53:07,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643536937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:07,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327548458] [2022-07-22 12:53:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:07,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:07,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:07,687 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) [2022-07-22 12:53:07,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:53:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:07,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:53:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 155 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:08,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:53:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:08,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327548458] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:08,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:53:08,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2022-07-22 12:53:08,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268352256] [2022-07-22 12:53:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:08,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 12:53:08,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 12:53:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:08,838 INFO L87 Difference]: Start difference. First operand 18858 states and 21846 transitions. Second operand has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:11,915 INFO L93 Difference]: Finished difference Result 56887 states and 65971 transitions. [2022-07-22 12:53:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 12:53:11,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 371 [2022-07-22 12:53:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:11,974 INFO L225 Difference]: With dead ends: 56887 [2022-07-22 12:53:11,975 INFO L226 Difference]: Without dead ends: 37181 [2022-07-22 12:53:11,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 735 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:11,996 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1606 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2578 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:11,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1606 Valid, 138 Invalid, 3488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2578 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:53:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37181 states. [2022-07-22 12:53:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37181 to 36745. [2022-07-22 12:53:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36745 states, 36744 states have (on average 1.1361582843457436) internal successors, (41747), 36744 states have internal predecessors, (41747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36745 states to 36745 states and 41747 transitions. [2022-07-22 12:53:12,497 INFO L78 Accepts]: Start accepts. Automaton has 36745 states and 41747 transitions. Word has length 371 [2022-07-22 12:53:12,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:12,498 INFO L495 AbstractCegarLoop]: Abstraction has 36745 states and 41747 transitions. [2022-07-22 12:53:12,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.2) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36745 states and 41747 transitions. [2022-07-22 12:53:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-22 12:53:12,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:12,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:12,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:53:12,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 12:53:12,724 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:12,725 INFO L85 PathProgramCache]: Analyzing trace with hash 704014078, now seen corresponding path program 1 times [2022-07-22 12:53:12,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:12,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713991128] [2022-07-22 12:53:12,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:12,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713991128] [2022-07-22 12:53:12,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713991128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:12,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784344428] [2022-07-22 12:53:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:12,921 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) [2022-07-22 12:53:12,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:53:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:53:13,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:53:14,793 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 242 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:14,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784344428] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:53:14,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:53:14,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2022-07-22 12:53:14,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909447990] [2022-07-22 12:53:14,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:53:14,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:53:14,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:14,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:53:14,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:53:14,805 INFO L87 Difference]: Start difference. First operand 36745 states and 41747 transitions. Second operand has 9 states, 9 states have (on average 75.77777777777777) internal successors, (682), 8 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:19,458 INFO L93 Difference]: Finished difference Result 113326 states and 128979 transitions. [2022-07-22 12:53:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 12:53:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 75.77777777777777) internal successors, (682), 8 states have internal predecessors, (682), 0 states have call successors, (0), 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 414 [2022-07-22 12:53:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:19,560 INFO L225 Difference]: With dead ends: 113326 [2022-07-22 12:53:19,561 INFO L226 Difference]: Without dead ends: 76583 [2022-07-22 12:53:19,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 835 GetRequests, 823 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-07-22 12:53:19,685 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 3633 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 5814 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3633 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 7206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 5814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 695 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:19,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3633 Valid, 442 Invalid, 7206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 5814 Invalid, 0 Unknown, 695 Unchecked, 4.1s Time] [2022-07-22 12:53:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76583 states. [2022-07-22 12:53:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76583 to 71351. [2022-07-22 12:53:20,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71351 states, 71350 states have (on average 1.1213594954449895) internal successors, (80009), 71350 states have internal predecessors, (80009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71351 states to 71351 states and 80009 transitions. [2022-07-22 12:53:20,634 INFO L78 Accepts]: Start accepts. Automaton has 71351 states and 80009 transitions. Word has length 414 [2022-07-22 12:53:20,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:20,635 INFO L495 AbstractCegarLoop]: Abstraction has 71351 states and 80009 transitions. [2022-07-22 12:53:20,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 75.77777777777777) internal successors, (682), 8 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,635 INFO L276 IsEmpty]: Start isEmpty. Operand 71351 states and 80009 transitions. [2022-07-22 12:53:20,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-07-22 12:53:20,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:20,648 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:20,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 12:53:20,863 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,SelfDestructingSolverStorable11 [2022-07-22 12:53:20,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:20,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:20,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1196618286, now seen corresponding path program 1 times [2022-07-22 12:53:20,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:20,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962929044] [2022-07-22 12:53:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:20,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 367 proven. 73 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-22 12:53:21,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962929044] [2022-07-22 12:53:21,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962929044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:21,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120397745] [2022-07-22 12:53:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:21,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:21,213 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) [2022-07-22 12:53:21,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:53:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:21,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:53:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 367 proven. 73 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-22 12:53:21,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:53:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 440 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-22 12:53:22,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120397745] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:22,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:53:22,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2022-07-22 12:53:22,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948089348] [2022-07-22 12:53:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:22,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:53:22,038 INFO L87 Difference]: Start difference. First operand 71351 states and 80009 transitions. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:25,012 INFO L93 Difference]: Finished difference Result 162200 states and 181529 transitions. [2022-07-22 12:53:25,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 472 [2022-07-22 12:53:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:25,128 INFO L225 Difference]: With dead ends: 162200 [2022-07-22 12:53:25,129 INFO L226 Difference]: Without dead ends: 91381 [2022-07-22 12:53:25,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 945 GetRequests, 939 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:53:25,163 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 861 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 143 Invalid, 2654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:53:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91381 states. [2022-07-22 12:53:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91381 to 86274. [2022-07-22 12:53:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86274 states, 86273 states have (on average 1.1128278835788716) internal successors, (96007), 86273 states have internal predecessors, (96007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86274 states to 86274 states and 96007 transitions. [2022-07-22 12:53:26,374 INFO L78 Accepts]: Start accepts. Automaton has 86274 states and 96007 transitions. Word has length 472 [2022-07-22 12:53:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:26,374 INFO L495 AbstractCegarLoop]: Abstraction has 86274 states and 96007 transitions. [2022-07-22 12:53:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,375 INFO L276 IsEmpty]: Start isEmpty. Operand 86274 states and 96007 transitions. [2022-07-22 12:53:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2022-07-22 12:53:26,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:26,384 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:26,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 12:53:26,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:26,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:26,600 INFO L85 PathProgramCache]: Analyzing trace with hash 341296752, now seen corresponding path program 1 times [2022-07-22 12:53:26,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149433777] [2022-07-22 12:53:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:26,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:53:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:26,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149433777] [2022-07-22 12:53:26,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149433777] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:26,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:26,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:26,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835195026] [2022-07-22 12:53:26,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:26,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:26,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:26,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:26,826 INFO L87 Difference]: Start difference. First operand 86274 states and 96007 transitions. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:28,616 INFO L93 Difference]: Finished difference Result 183151 states and 203737 transitions. [2022-07-22 12:53:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 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 485 [2022-07-22 12:53:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:28,877 INFO L225 Difference]: With dead ends: 183151 [2022-07-22 12:53:28,878 INFO L226 Difference]: Without dead ends: 96984 [2022-07-22 12:53:28,912 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 [2022-07-22 12:53:28,913 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 278 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:28,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 222 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:53:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96984 states. [2022-07-22 12:53:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96984 to 86274. [2022-07-22 12:53:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86274 states, 86273 states have (on average 1.1113326301392092) internal successors, (95878), 86273 states have internal predecessors, (95878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86274 states to 86274 states and 95878 transitions. [2022-07-22 12:53:30,060 INFO L78 Accepts]: Start accepts. Automaton has 86274 states and 95878 transitions. Word has length 485 [2022-07-22 12:53:30,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 86274 states and 95878 transitions. [2022-07-22 12:53:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 86274 states and 95878 transitions. [2022-07-22 12:53:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-07-22 12:53:30,069 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:30,070 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:30,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:53:30,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:30,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:30,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1181450359, now seen corresponding path program 1 times [2022-07-22 12:53:30,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:30,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280155718] [2022-07-22 12:53:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:30,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 517 proven. 80 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:30,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:30,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280155718] [2022-07-22 12:53:30,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280155718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:30,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309606060] [2022-07-22 12:53:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:30,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:30,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:30,352 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) [2022-07-22 12:53:30,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:53:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:30,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:53:30,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 597 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 12:53:30,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:30,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309606060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:30,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:30,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-22 12:53:30,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542728504] [2022-07-22 12:53:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:30,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:30,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:30,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:30,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:30,847 INFO L87 Difference]: Start difference. First operand 86274 states and 95878 transitions. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:33,359 INFO L93 Difference]: Finished difference Result 176266 states and 195657 transitions. [2022-07-22 12:53:33,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:33,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 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 496 [2022-07-22 12:53:33,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:33,734 INFO L225 Difference]: With dead ends: 176266 [2022-07-22 12:53:33,735 INFO L226 Difference]: Without dead ends: 90524 [2022-07-22 12:53:33,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:33,784 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 814 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2048 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:33,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 251 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2048 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 12:53:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90524 states. [2022-07-22 12:53:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90524 to 85849. [2022-07-22 12:53:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85849 states, 85848 states have (on average 1.1116391762184326) internal successors, (95432), 85848 states have internal predecessors, (95432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85849 states to 85849 states and 95432 transitions. [2022-07-22 12:53:35,004 INFO L78 Accepts]: Start accepts. Automaton has 85849 states and 95432 transitions. Word has length 496 [2022-07-22 12:53:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:35,004 INFO L495 AbstractCegarLoop]: Abstraction has 85849 states and 95432 transitions. [2022-07-22 12:53:35,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85849 states and 95432 transitions. [2022-07-22 12:53:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-07-22 12:53:35,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:35,017 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:35,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 12:53:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 12:53:35,227 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash -308219943, now seen corresponding path program 1 times [2022-07-22 12:53:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:35,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5489023] [2022-07-22 12:53:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 503 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-07-22 12:53:35,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5489023] [2022-07-22 12:53:35,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5489023] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:35,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:35,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:35,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174313166] [2022-07-22 12:53:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:35,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:35,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:35,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:35,361 INFO L87 Difference]: Start difference. First operand 85849 states and 95432 transitions. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:37,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:37,201 INFO L93 Difference]: Finished difference Result 195105 states and 216531 transitions. [2022-07-22 12:53:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 501 [2022-07-22 12:53:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:37,532 INFO L225 Difference]: With dead ends: 195105 [2022-07-22 12:53:37,532 INFO L226 Difference]: Without dead ends: 109788 [2022-07-22 12:53:37,572 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 [2022-07-22 12:53:37,573 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 364 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:37,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 753 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109788 states. [2022-07-22 12:53:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109788 to 109346. [2022-07-22 12:53:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109346 states, 109345 states have (on average 1.0882985047327267) internal successors, (119000), 109345 states have internal predecessors, (119000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109346 states to 109346 states and 119000 transitions. [2022-07-22 12:53:38,991 INFO L78 Accepts]: Start accepts. Automaton has 109346 states and 119000 transitions. Word has length 501 [2022-07-22 12:53:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:38,991 INFO L495 AbstractCegarLoop]: Abstraction has 109346 states and 119000 transitions. [2022-07-22 12:53:38,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:38,992 INFO L276 IsEmpty]: Start isEmpty. Operand 109346 states and 119000 transitions. [2022-07-22 12:53:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2022-07-22 12:53:39,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:39,005 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:53:39,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:39,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash -920286702, now seen corresponding path program 1 times [2022-07-22 12:53:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:39,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308445253] [2022-07-22 12:53:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:39,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 357 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-07-22 12:53:39,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:39,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308445253] [2022-07-22 12:53:39,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308445253] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:39,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:39,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:39,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682352475] [2022-07-22 12:53:39,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:39,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:39,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:39,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:39,350 INFO L87 Difference]: Start difference. First operand 109346 states and 119000 transitions. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:41,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:41,409 INFO L93 Difference]: Finished difference Result 235591 states and 256366 transitions. [2022-07-22 12:53:41,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 544 [2022-07-22 12:53:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:41,588 INFO L225 Difference]: With dead ends: 235591 [2022-07-22 12:53:41,588 INFO L226 Difference]: Without dead ends: 126777 [2022-07-22 12:53:41,652 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 [2022-07-22 12:53:41,653 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 482 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:41,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 655 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 12:53:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126777 states. [2022-07-22 12:53:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126777 to 126770. [2022-07-22 12:53:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126770 states, 126769 states have (on average 1.0782289045429088) internal successors, (136686), 126769 states have internal predecessors, (136686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126770 states to 126770 states and 136686 transitions. [2022-07-22 12:53:43,374 INFO L78 Accepts]: Start accepts. Automaton has 126770 states and 136686 transitions. Word has length 544 [2022-07-22 12:53:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:43,374 INFO L495 AbstractCegarLoop]: Abstraction has 126770 states and 136686 transitions. [2022-07-22 12:53:43,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 126770 states and 136686 transitions. [2022-07-22 12:53:43,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2022-07-22 12:53:43,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:43,391 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:43,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:53:43,392 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:43,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:43,392 INFO L85 PathProgramCache]: Analyzing trace with hash 668304960, now seen corresponding path program 1 times [2022-07-22 12:53:43,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:43,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73123917] [2022-07-22 12:53:43,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:43,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2022-07-22 12:53:43,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:43,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73123917] [2022-07-22 12:53:43,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73123917] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:43,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:43,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:53:43,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018436557] [2022-07-22 12:53:43,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:43,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:43,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:43,896 INFO L87 Difference]: Start difference. First operand 126770 states and 136686 transitions. Second operand has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:47,357 INFO L93 Difference]: Finished difference Result 279419 states and 300806 transitions. [2022-07-22 12:53:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 583 [2022-07-22 12:53:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:47,530 INFO L225 Difference]: With dead ends: 279419 [2022-07-22 12:53:47,530 INFO L226 Difference]: Without dead ends: 152331 [2022-07-22 12:53:47,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:47,579 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 833 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:47,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 141 Invalid, 2804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:53:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152331 states. [2022-07-22 12:53:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152331 to 139103. [2022-07-22 12:53:49,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139103 states, 139102 states have (on average 1.0769794826817731) internal successors, (149810), 139102 states have internal predecessors, (149810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139103 states to 139103 states and 149810 transitions. [2022-07-22 12:53:49,466 INFO L78 Accepts]: Start accepts. Automaton has 139103 states and 149810 transitions. Word has length 583 [2022-07-22 12:53:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:49,466 INFO L495 AbstractCegarLoop]: Abstraction has 139103 states and 149810 transitions. [2022-07-22 12:53:49,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.75) internal successors, (319), 4 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 139103 states and 149810 transitions. [2022-07-22 12:53:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-07-22 12:53:49,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:49,482 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:49,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 12:53:49,482 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:49,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:49,483 INFO L85 PathProgramCache]: Analyzing trace with hash 618956926, now seen corresponding path program 1 times [2022-07-22 12:53:49,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:49,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533369336] [2022-07-22 12:53:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:49,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 754 proven. 0 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 12:53:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:49,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533369336] [2022-07-22 12:53:49,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533369336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:49,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:49,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:49,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358740019] [2022-07-22 12:53:49,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:49,930 INFO L87 Difference]: Start difference. First operand 139103 states and 149810 transitions. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:52,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:52,735 INFO L93 Difference]: Finished difference Result 295549 states and 318738 transitions. [2022-07-22 12:53:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:52,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 599 [2022-07-22 12:53:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:52,943 INFO L225 Difference]: With dead ends: 295549 [2022-07-22 12:53:52,944 INFO L226 Difference]: Without dead ends: 156978 [2022-07-22 12:53:52,968 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 [2022-07-22 12:53:52,969 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 266 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:52,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 261 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156978 states. [2022-07-22 12:53:54,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156978 to 149309. [2022-07-22 12:53:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149309 states, 149308 states have (on average 1.0698221126798295) internal successors, (159733), 149308 states have internal predecessors, (159733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149309 states to 149309 states and 159733 transitions. [2022-07-22 12:53:55,069 INFO L78 Accepts]: Start accepts. Automaton has 149309 states and 159733 transitions. Word has length 599 [2022-07-22 12:53:55,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:55,069 INFO L495 AbstractCegarLoop]: Abstraction has 149309 states and 159733 transitions. [2022-07-22 12:53:55,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 149309 states and 159733 transitions. [2022-07-22 12:53:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-07-22 12:53:55,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:55,082 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:55,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:53:55,082 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash -81054258, now seen corresponding path program 1 times [2022-07-22 12:53:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:55,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417885594] [2022-07-22 12:53:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 12:53:55,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417885594] [2022-07-22 12:53:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417885594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:55,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:53:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358657812] [2022-07-22 12:53:55,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:55,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:55,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:55,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:55,256 INFO L87 Difference]: Start difference. First operand 149309 states and 159733 transitions. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:58,772 INFO L93 Difference]: Finished difference Result 329634 states and 352387 transitions. [2022-07-22 12:53:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 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 599 [2022-07-22 12:53:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:59,003 INFO L225 Difference]: With dead ends: 329634 [2022-07-22 12:53:59,004 INFO L226 Difference]: Without dead ends: 180857 [2022-07-22 12:53:59,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:53:59,098 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 711 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:59,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 253 Invalid, 2658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:53:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180857 states. [2022-07-22 12:54:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180857 to 167202. [2022-07-22 12:54:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167202 states, 167201 states have (on average 1.0698739840072726) internal successors, (178884), 167201 states have internal predecessors, (178884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167202 states to 167202 states and 178884 transitions. [2022-07-22 12:54:01,736 INFO L78 Accepts]: Start accepts. Automaton has 167202 states and 178884 transitions. Word has length 599 [2022-07-22 12:54:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:54:01,736 INFO L495 AbstractCegarLoop]: Abstraction has 167202 states and 178884 transitions. [2022-07-22 12:54:01,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 167202 states and 178884 transitions. [2022-07-22 12:54:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2022-07-22 12:54:01,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:54:01,751 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:54:01,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:54:01,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:54:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:54:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash -267407460, now seen corresponding path program 1 times [2022-07-22 12:54:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:54:01,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074851951] [2022-07-22 12:54:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:01,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:54:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 738 proven. 175 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 12:54:01,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:54:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074851951] [2022-07-22 12:54:01,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074851951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:54:01,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537071371] [2022-07-22 12:54:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:01,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:54:01,919 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) [2022-07-22 12:54:01,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:54:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:54:02,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:54:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 913 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 12:54:02,475 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:54:02,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537071371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:54:02,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:54:02,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-22 12:54:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908655419] [2022-07-22 12:54:02,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:54:02,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:54:02,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:54:02,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:54:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:54:02,478 INFO L87 Difference]: Start difference. First operand 167202 states and 178884 transitions. Second operand has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:54:05,546 INFO L93 Difference]: Finished difference Result 342829 states and 366532 transitions. [2022-07-22 12:54:05,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:54:05,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 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 613 [2022-07-22 12:54:05,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:54:05,787 INFO L225 Difference]: With dead ends: 342829 [2022-07-22 12:54:05,788 INFO L226 Difference]: Without dead ends: 176159 [2022-07-22 12:54:05,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:54:05,860 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 753 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:54:05,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 255 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2054 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:54:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176159 states. [2022-07-22 12:54:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176159 to 170525. [2022-07-22 12:54:07,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170525 states, 170524 states have (on average 1.0654687903169056) internal successors, (181688), 170524 states have internal predecessors, (181688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170525 states to 170525 states and 181688 transitions. [2022-07-22 12:54:08,161 INFO L78 Accepts]: Start accepts. Automaton has 170525 states and 181688 transitions. Word has length 613 [2022-07-22 12:54:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:54:08,161 INFO L495 AbstractCegarLoop]: Abstraction has 170525 states and 181688 transitions. [2022-07-22 12:54:08,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 128.25) internal successors, (513), 4 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:54:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 170525 states and 181688 transitions. [2022-07-22 12:54:08,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2022-07-22 12:54:08,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:54:08,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:54:08,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 12:54:08,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:54:08,392 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:54:08,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:54:08,392 INFO L85 PathProgramCache]: Analyzing trace with hash 188952405, now seen corresponding path program 1 times [2022-07-22 12:54:08,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:54:08,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164229698] [2022-07-22 12:54:08,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:54:08,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:54:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:54:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 374 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 12:54:08,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:54:08,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164229698] [2022-07-22 12:54:08,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164229698] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:54:08,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:54:08,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:54:08,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166168211] [2022-07-22 12:54:08,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:54:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:54:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:54:08,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:54:08,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:54:08,583 INFO L87 Difference]: Start difference. First operand 170525 states and 181688 transitions. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)