./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.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 52f0467b9e67537a0ac20514e4a1726e96ded28a47950e156d374c001df2ce1c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 09:06:15,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 09:06:15,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 09:06:15,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 09:06:15,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 09:06:15,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 09:06:15,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 09:06:15,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 09:06:15,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 09:06:15,781 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 09:06:15,782 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 09:06:15,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 09:06:15,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 09:06:15,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 09:06:15,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 09:06:15,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 09:06:15,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 09:06:15,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 09:06:15,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 09:06:15,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 09:06:15,793 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 09:06:15,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 09:06:15,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 09:06:15,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 09:06:15,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 09:06:15,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 09:06:15,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 09:06:15,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 09:06:15,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 09:06:15,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 09:06:15,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 09:06:15,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 09:06:15,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 09:06:15,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 09:06:15,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 09:06:15,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 09:06:15,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 09:06:15,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 09:06:15,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 09:06:15,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 09:06:15,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 09:06:15,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 09:06:15,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 09:06:15,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 09:06:15,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 09:06:15,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 09:06:15,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 09:06:15,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 09:06:15,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 09:06:15,844 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 09:06:15,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 09:06:15,844 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 09:06:15,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 09:06:15,845 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 09:06:15,845 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 09:06:15,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 09:06:15,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 09:06:15,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 09:06:15,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 09:06:15,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 09:06:15,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 09:06:15,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:06:15,847 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 09:06:15,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 09:06:15,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 09:06:15,848 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52f0467b9e67537a0ac20514e4a1726e96ded28a47950e156d374c001df2ce1c [2022-07-12 09:06:16,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 09:06:16,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 09:06:16,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 09:06:16,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 09:06:16,085 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 09:06:16,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2022-07-12 09:06:16,132 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfbb513/23c726e2fb3a4178b303f563b843124f/FLAG9137ef8aa [2022-07-12 09:06:16,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 09:06:16,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2022-07-12 09:06:16,716 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfbb513/23c726e2fb3a4178b303f563b843124f/FLAG9137ef8aa [2022-07-12 09:06:17,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1bfbb513/23c726e2fb3a4178b303f563b843124f [2022-07-12 09:06:17,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 09:06:17,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 09:06:17,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 09:06:17,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 09:06:17,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 09:06:17,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:06:17" (1/1) ... [2022-07-12 09:06:17,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0d95ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:17, skipping insertion in model container [2022-07-12 09:06:17,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 09:06:17" (1/1) ... [2022-07-12 09:06:17,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 09:06:17,251 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 09:06:17,404 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[8653,8666] [2022-07-12 09:06:17,438 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[16401,16414] [2022-07-12 09:06:17,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:06:17,882 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 09:06:17,913 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[8653,8666] [2022-07-12 09:06:17,922 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/combinations/pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c[16401,16414] [2022-07-12 09:06:18,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 09:06:18,211 INFO L208 MainTranslator]: Completed translation [2022-07-12 09:06:18,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18 WrapperNode [2022-07-12 09:06:18,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 09:06:18,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 09:06:18,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 09:06:18,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 09:06:18,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,256 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,568 INFO L137 Inliner]: procedures = 34, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 5032 [2022-07-12 09:06:18,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 09:06:18,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 09:06:18,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 09:06:18,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 09:06:18,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 09:06:18,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 09:06:18,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 09:06:18,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 09:06:18,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (1/1) ... [2022-07-12 09:06:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 09:06:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:06:18,888 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) [2022-07-12 09:06:18,943 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 [2022-07-12 09:06:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 09:06:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 09:06:18,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 09:06:18,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 09:06:19,103 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 09:06:19,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 09:06:21,765 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 09:06:21,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 09:06:21,778 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 09:06:21,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:06:21 BoogieIcfgContainer [2022-07-12 09:06:21,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 09:06:21,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 09:06:21,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 09:06:21,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 09:06:21,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 09:06:17" (1/3) ... [2022-07-12 09:06:21,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff304d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:06:21, skipping insertion in model container [2022-07-12 09:06:21,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 09:06:18" (2/3) ... [2022-07-12 09:06:21,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ff304d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 09:06:21, skipping insertion in model container [2022-07-12 09:06:21,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 09:06:21" (3/3) ... [2022-07-12 09:06:21,817 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals+Problem12_label09.c [2022-07-12 09:06:21,826 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 09:06:21,826 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-12 09:06:21,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 09:06:21,895 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@2533e060, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@208e6f0b [2022-07-12 09:06:21,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-12 09:06:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:06:21,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:21,917 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] [2022-07-12 09:06:21,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:21,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:21,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2022-07-12 09:06:21,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:21,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421787391] [2022-07-12 09:06:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:21,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421787391] [2022-07-12 09:06:22,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421787391] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 09:06:22,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647391595] [2022-07-12 09:06:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 09:06:22,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 09:06:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:06:22,047 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) 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) [2022-07-12 09:06:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,091 INFO L93 Difference]: Finished difference Result 1757 states and 3332 transitions. [2022-07-12 09:06:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 09:06:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) 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 [2022-07-12 09:06:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,104 INFO L225 Difference]: With dead ends: 1757 [2022-07-12 09:06:22,104 INFO L226 Difference]: Without dead ends: 827 [2022-07-12 09:06:22,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 09:06:22,110 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-07-12 09:06:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2022-07-12 09:06:22,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2022-07-12 09:06:22,161 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2022-07-12 09:06:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,162 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2022-07-12 09:06:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) 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) [2022-07-12 09:06:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2022-07-12 09:06:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 09:06:22,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,163 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] [2022-07-12 09:06:22,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 09:06:22,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2022-07-12 09:06:22,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067458494] [2022-07-12 09:06:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067458494] [2022-07-12 09:06:22,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067458494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:06:22,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070140275] [2022-07-12 09:06:22,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:06:22,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:06:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:06:22,246 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2022-07-12 09:06:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,347 INFO L93 Difference]: Finished difference Result 919 states and 1702 transitions. [2022-07-12 09:06:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:22,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 [2022-07-12 09:06:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,351 INFO L225 Difference]: With dead ends: 919 [2022-07-12 09:06:22,351 INFO L226 Difference]: Without dead ends: 871 [2022-07-12 09:06:22,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-12 09:06:22,353 INFO L413 NwaCegarLoop]: 1556 mSDtfsCounter, 71 mSDsluCounter, 4640 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 6196 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-12 09:06:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 827. [2022-07-12 09:06:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2022-07-12 09:06:22,367 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2022-07-12 09:06:22,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,367 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2022-07-12 09:06:22,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2022-07-12 09:06:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2022-07-12 09:06:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:06:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:22,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 09:06:22,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,370 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2022-07-12 09:06:22,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213077737] [2022-07-12 09:06:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213077737] [2022-07-12 09:06:22,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213077737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:22,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250797900] [2022-07-12 09:06:22,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:06:22,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:06:22,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:06:22,476 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,499 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2022-07-12 09:06:22,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:06:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-12 09:06:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,511 INFO L225 Difference]: With dead ends: 909 [2022-07-12 09:06:22,512 INFO L226 Difference]: Without dead ends: 865 [2022-07-12 09:06:22,513 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 [2022-07-12 09:06:22,513 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-12 09:06:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2022-07-12 09:06:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2022-07-12 09:06:22,527 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2022-07-12 09:06:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,527 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2022-07-12 09:06:22,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2022-07-12 09:06:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:06:22,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:22,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 09:06:22,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2022-07-12 09:06:22,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136287583] [2022-07-12 09:06:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136287583] [2022-07-12 09:06:22,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136287583] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:22,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096694701] [2022-07-12 09:06:22,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:06:22,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:06:22,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:06:22,570 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,591 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2022-07-12 09:06:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:06:22,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-12 09:06:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,594 INFO L225 Difference]: With dead ends: 1011 [2022-07-12 09:06:22,594 INFO L226 Difference]: Without dead ends: 931 [2022-07-12 09:06:22,595 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 [2022-07-12 09:06:22,602 INFO L413 NwaCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-07-12 09:06:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2022-07-12 09:06:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2022-07-12 09:06:22,617 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2022-07-12 09:06:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,618 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2022-07-12 09:06:22,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2022-07-12 09:06:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:06:22,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:22,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 09:06:22,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2022-07-12 09:06:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636274020] [2022-07-12 09:06:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636274020] [2022-07-12 09:06:22,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636274020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:22,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915809968] [2022-07-12 09:06:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:06:22,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:06:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:06:22,677 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,702 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2022-07-12 09:06:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:06:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-12 09:06:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,711 INFO L225 Difference]: With dead ends: 1197 [2022-07-12 09:06:22,711 INFO L226 Difference]: Without dead ends: 1051 [2022-07-12 09:06:22,711 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 [2022-07-12 09:06:22,712 INFO L413 NwaCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-07-12 09:06:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2022-07-12 09:06:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2022-07-12 09:06:22,734 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2022-07-12 09:06:22,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,736 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2022-07-12 09:06:22,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2022-07-12 09:06:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:06:22,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 09:06:22,740 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2022-07-12 09:06:22,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874901398] [2022-07-12 09:06:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874901398] [2022-07-12 09:06:22,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874901398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790561795] [2022-07-12 09:06:22,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:06:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:06:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:06:22,801 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:22,828 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2022-07-12 09:06:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:06:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-12 09:06:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:22,833 INFO L225 Difference]: With dead ends: 1533 [2022-07-12 09:06:22,833 INFO L226 Difference]: Without dead ends: 1267 [2022-07-12 09:06:22,833 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 [2022-07-12 09:06:22,834 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:22,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-07-12 09:06:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2022-07-12 09:06:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2022-07-12 09:06:22,856 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2022-07-12 09:06:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:22,857 INFO L495 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2022-07-12 09:06:22,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2022-07-12 09:06:22,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-12 09:06:22,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:22,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:22,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 09:06:22,858 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:22,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2022-07-12 09:06:22,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:22,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286618221] [2022-07-12 09:06:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:22,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:22,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:22,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286618221] [2022-07-12 09:06:22,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286618221] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:22,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:22,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:22,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648215547] [2022-07-12 09:06:22,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:22,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:22,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:22,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:22,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:22,927 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:23,110 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2022-07-12 09:06:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 09:06:23,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2022-07-12 09:06:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:23,126 INFO L225 Difference]: With dead ends: 5121 [2022-07-12 09:06:23,126 INFO L226 Difference]: Without dead ends: 4639 [2022-07-12 09:06:23,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-12 09:06:23,130 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:23,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 09:06:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2022-07-12 09:06:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2022-07-12 09:06:23,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2022-07-12 09:06:23,245 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2022-07-12 09:06:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:23,246 INFO L495 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2022-07-12 09:06:23,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2022-07-12 09:06:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:06:23,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:23,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:23,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 09:06:23,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:23,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2022-07-12 09:06:23,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777207219] [2022-07-12 09:06:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:23,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777207219] [2022-07-12 09:06:23,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777207219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:23,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:23,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422266684] [2022-07-12 09:06:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 09:06:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 09:06:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 09:06:23,278 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:23,340 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2022-07-12 09:06:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 09:06:23,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-12 09:06:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:23,347 INFO L225 Difference]: With dead ends: 3151 [2022-07-12 09:06:23,347 INFO L226 Difference]: Without dead ends: 2189 [2022-07-12 09:06:23,349 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 [2022-07-12 09:06:23,350 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:23,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-07-12 09:06:23,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2022-07-12 09:06:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2022-07-12 09:06:23,408 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2022-07-12 09:06:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:23,409 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2022-07-12 09:06:23,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2022-07-12 09:06:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-12 09:06:23,409 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:23,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:23,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 09:06:23,410 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:23,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:23,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2022-07-12 09:06:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:23,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749911805] [2022-07-12 09:06:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:23,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:23,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749911805] [2022-07-12 09:06:23,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749911805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:23,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:23,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:23,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711420607] [2022-07-12 09:06:23,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:23,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:23,483 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:23,609 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2022-07-12 09:06:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2022-07-12 09:06:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:23,615 INFO L225 Difference]: With dead ends: 3591 [2022-07-12 09:06:23,615 INFO L226 Difference]: Without dead ends: 2189 [2022-07-12 09:06:23,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:06:23,618 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 6036 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6036 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:23,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6036 Valid, 1726 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-07-12 09:06:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2022-07-12 09:06:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2022-07-12 09:06:23,682 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2022-07-12 09:06:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:23,683 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2022-07-12 09:06:23,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2022-07-12 09:06:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:06:23,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:23,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:23,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 09:06:23,684 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:23,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2022-07-12 09:06:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:23,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179637425] [2022-07-12 09:06:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:23,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:23,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179637425] [2022-07-12 09:06:23,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179637425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:23,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:23,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:06:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084223320] [2022-07-12 09:06:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:23,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:23,753 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:23,902 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2022-07-12 09:06:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-12 09:06:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:23,908 INFO L225 Difference]: With dead ends: 3589 [2022-07-12 09:06:23,908 INFO L226 Difference]: Without dead ends: 2187 [2022-07-12 09:06:23,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:23,910 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 4595 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4595 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:23,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4595 Valid, 2977 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-07-12 09:06:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-07-12 09:06:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2022-07-12 09:06:23,992 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2022-07-12 09:06:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:23,993 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2022-07-12 09:06:23,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:23,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2022-07-12 09:06:23,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:06:23,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:23,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:23,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 09:06:23,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:23,994 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2022-07-12 09:06:23,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:23,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579947004] [2022-07-12 09:06:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:23,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:24,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579947004] [2022-07-12 09:06:24,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579947004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:24,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:24,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:06:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360205737] [2022-07-12 09:06:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:24,031 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:24,160 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2022-07-12 09:06:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-12 09:06:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:24,169 INFO L225 Difference]: With dead ends: 3589 [2022-07-12 09:06:24,169 INFO L226 Difference]: Without dead ends: 2187 [2022-07-12 09:06:24,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:24,171 INFO L413 NwaCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:24,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-07-12 09:06:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-07-12 09:06:24,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2022-07-12 09:06:24,249 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2022-07-12 09:06:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:24,250 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2022-07-12 09:06:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2022-07-12 09:06:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 09:06:24,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:24,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 09:06:24,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2022-07-12 09:06:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:24,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905754085] [2022-07-12 09:06:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:24,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905754085] [2022-07-12 09:06:24,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905754085] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:24,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:24,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 09:06:24,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861180944] [2022-07-12 09:06:24,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:24,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 09:06:24,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 09:06:24,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:06:24,286 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:24,497 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2022-07-12 09:06:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 09:06:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2022-07-12 09:06:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:24,506 INFO L225 Difference]: With dead ends: 3418 [2022-07-12 09:06:24,506 INFO L226 Difference]: Without dead ends: 3416 [2022-07-12 09:06:24,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 09:06:24,507 INFO L413 NwaCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:24,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-07-12 09:06:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2022-07-12 09:06:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2022-07-12 09:06:24,636 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2022-07-12 09:06:24,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:24,637 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2022-07-12 09:06:24,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2022-07-12 09:06:24,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-12 09:06:24,641 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:24,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:24,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 09:06:24,641 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:24,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1457269204, now seen corresponding path program 1 times [2022-07-12 09:06:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:24,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372401919] [2022-07-12 09:06:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:24,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372401919] [2022-07-12 09:06:24,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372401919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:24,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:24,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 09:06:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900964347] [2022-07-12 09:06:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 09:06:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 09:06:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 09:06:24,697 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:29,568 INFO L93 Difference]: Finished difference Result 4538 states and 7868 transitions. [2022-07-12 09:06:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 09:06:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-12 09:06:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:29,586 INFO L225 Difference]: With dead ends: 4538 [2022-07-12 09:06:29,587 INFO L226 Difference]: Without dead ends: 3785 [2022-07-12 09:06:29,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 09:06:29,588 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 2372 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5154 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 6404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 5154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:29,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2372 Valid, 807 Invalid, 6404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1250 Valid, 5154 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-12 09:06:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2022-07-12 09:06:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2022-07-12 09:06:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3783 states have (on average 1.4631245043616177) internal successors, (5535), 3784 states have internal predecessors, (5535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 5535 transitions. [2022-07-12 09:06:29,721 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 5535 transitions. Word has length 67 [2022-07-12 09:06:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:29,722 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 5535 transitions. [2022-07-12 09:06:29,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:29,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 5535 transitions. [2022-07-12 09:06:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:06:29,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:29,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:29,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 09:06:29,725 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:29,725 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2022-07-12 09:06:29,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:29,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744885214] [2022-07-12 09:06:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:29,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 09:06:29,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:29,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744885214] [2022-07-12 09:06:29,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744885214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:29,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:29,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:29,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929724139] [2022-07-12 09:06:29,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:29,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:29,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:29,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:29,774 INFO L87 Difference]: Start difference. First operand 3785 states and 5535 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:30,230 INFO L93 Difference]: Finished difference Result 10091 states and 14304 transitions. [2022-07-12 09:06:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:30,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 79 [2022-07-12 09:06:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:30,241 INFO L225 Difference]: With dead ends: 10091 [2022-07-12 09:06:30,241 INFO L226 Difference]: Without dead ends: 8593 [2022-07-12 09:06:30,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:30,243 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4749 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4749 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:30,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4749 Valid, 3340 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2022-07-12 09:06:30,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 5281. [2022-07-12 09:06:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5281 states, 5279 states have (on average 1.4394771737071415) internal successors, (7599), 5280 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:30,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5281 states to 5281 states and 7599 transitions. [2022-07-12 09:06:30,477 INFO L78 Accepts]: Start accepts. Automaton has 5281 states and 7599 transitions. Word has length 79 [2022-07-12 09:06:30,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:30,478 INFO L495 AbstractCegarLoop]: Abstraction has 5281 states and 7599 transitions. [2022-07-12 09:06:30,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:30,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5281 states and 7599 transitions. [2022-07-12 09:06:30,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:06:30,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:30,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:30,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 09:06:30,480 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:30,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2022-07-12 09:06:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:30,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100709747] [2022-07-12 09:06:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:30,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 09:06:30,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100709747] [2022-07-12 09:06:30,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100709747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:30,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:30,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959518335] [2022-07-12 09:06:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:30,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:30,522 INFO L87 Difference]: Start difference. First operand 5281 states and 7599 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:31,061 INFO L93 Difference]: Finished difference Result 11587 states and 16368 transitions. [2022-07-12 09:06:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 79 [2022-07-12 09:06:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:31,074 INFO L225 Difference]: With dead ends: 11587 [2022-07-12 09:06:31,074 INFO L226 Difference]: Without dead ends: 10089 [2022-07-12 09:06:31,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:31,078 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 4706 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4706 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:31,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4706 Valid, 3379 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10089 states. [2022-07-12 09:06:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10089 to 7529. [2022-07-12 09:06:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7529 states, 7527 states have (on average 1.4182277135645012) internal successors, (10675), 7528 states have internal predecessors, (10675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7529 states to 7529 states and 10675 transitions. [2022-07-12 09:06:31,500 INFO L78 Accepts]: Start accepts. Automaton has 7529 states and 10675 transitions. Word has length 79 [2022-07-12 09:06:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:31,500 INFO L495 AbstractCegarLoop]: Abstraction has 7529 states and 10675 transitions. [2022-07-12 09:06:31,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 7529 states and 10675 transitions. [2022-07-12 09:06:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:06:31,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:31,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:31,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 09:06:31,509 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:31,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2022-07-12 09:06:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:31,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202199995] [2022-07-12 09:06:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 09:06:31,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:31,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202199995] [2022-07-12 09:06:31,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202199995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:31,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:31,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:31,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291993391] [2022-07-12 09:06:31,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:31,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:31,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:31,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:31,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:31,550 INFO L87 Difference]: Start difference. First operand 7529 states and 10675 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:32,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:32,221 INFO L93 Difference]: Finished difference Result 13083 states and 18432 transitions. [2022-07-12 09:06:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:32,221 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 79 [2022-07-12 09:06:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:32,238 INFO L225 Difference]: With dead ends: 13083 [2022-07-12 09:06:32,238 INFO L226 Difference]: Without dead ends: 11585 [2022-07-12 09:06:32,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:32,243 INFO L413 NwaCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:32,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11585 states. [2022-07-12 09:06:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11585 to 9025. [2022-07-12 09:06:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9023 states have (on average 1.4118364180427796) internal successors, (12739), 9024 states have internal predecessors, (12739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 12739 transitions. [2022-07-12 09:06:32,771 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 12739 transitions. Word has length 79 [2022-07-12 09:06:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:32,771 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 12739 transitions. [2022-07-12 09:06:32,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 12739 transitions. [2022-07-12 09:06:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-12 09:06:32,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:32,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 09:06:32,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-12 09:06:32,774 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:32,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2022-07-12 09:06:32,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:32,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271427748] [2022-07-12 09:06:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:32,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:06:32,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:32,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271427748] [2022-07-12 09:06:32,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271427748] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 09:06:32,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 09:06:32,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 09:06:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587986903] [2022-07-12 09:06:32,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 09:06:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 09:06:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 09:06:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 09:06:32,810 INFO L87 Difference]: Start difference. First operand 9025 states and 12739 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:33,564 INFO L93 Difference]: Finished difference Result 13699 states and 19296 transitions. [2022-07-12 09:06:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 09:06:33,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 79 [2022-07-12 09:06:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:33,580 INFO L225 Difference]: With dead ends: 13699 [2022-07-12 09:06:33,580 INFO L226 Difference]: Without dead ends: 12641 [2022-07-12 09:06:33,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-12 09:06:33,585 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 4739 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:33,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:33,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12641 states. [2022-07-12 09:06:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12641 to 10081. [2022-07-12 09:06:34,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10079 states have (on average 1.4099613056850877) internal successors, (14211), 10080 states have internal predecessors, (14211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14211 transitions. [2022-07-12 09:06:34,217 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14211 transitions. Word has length 79 [2022-07-12 09:06:34,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:34,217 INFO L495 AbstractCegarLoop]: Abstraction has 10081 states and 14211 transitions. [2022-07-12 09:06:34,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14211 transitions. [2022-07-12 09:06:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-12 09:06:34,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:34,219 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 09:06:34,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 09:06:34,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2022-07-12 09:06:34,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:34,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539297251] [2022-07-12 09:06:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:06:34,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:34,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539297251] [2022-07-12 09:06:34,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539297251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:06:34,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551906320] [2022-07-12 09:06:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:34,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:06:34,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:06:34,288 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) [2022-07-12 09:06:34,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 09:06:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:34,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:06:34,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:06:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:06:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:06:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 09:06:34,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551906320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:06:34,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:06:34,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-07-12 09:06:34,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685699589] [2022-07-12 09:06:34,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:06:34,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 09:06:34,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 09:06:34,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-12 09:06:34,741 INFO L87 Difference]: Start difference. First operand 10081 states and 14211 transitions. Second operand has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:06:36,628 INFO L93 Difference]: Finished difference Result 30702 states and 43069 transitions. [2022-07-12 09:06:36,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 09:06:36,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 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 80 [2022-07-12 09:06:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:06:36,657 INFO L225 Difference]: With dead ends: 30702 [2022-07-12 09:06:36,658 INFO L226 Difference]: Without dead ends: 24892 [2022-07-12 09:06:36,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-07-12 09:06:36,668 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 6357 mSDsluCounter, 4808 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6357 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 09:06:36,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6357 Valid, 6410 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 09:06:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24892 states. [2022-07-12 09:06:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24892 to 24721. [2022-07-12 09:06:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24721 states, 24719 states have (on average 1.3734778915004653) internal successors, (33951), 24720 states have internal predecessors, (33951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:38,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24721 states to 24721 states and 33951 transitions. [2022-07-12 09:06:38,572 INFO L78 Accepts]: Start accepts. Automaton has 24721 states and 33951 transitions. Word has length 80 [2022-07-12 09:06:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 09:06:38,572 INFO L495 AbstractCegarLoop]: Abstraction has 24721 states and 33951 transitions. [2022-07-12 09:06:38,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.9) internal successors, (219), 10 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 09:06:38,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24721 states and 33951 transitions. [2022-07-12 09:06:38,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 09:06:38,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 09:06:38,575 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 09:06:38,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 09:06:38,777 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,SelfDestructingSolverStorable17 [2022-07-12 09:06:38,777 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 09:06:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 09:06:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1057956914, now seen corresponding path program 1 times [2022-07-12 09:06:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 09:06:38,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052499723] [2022-07-12 09:06:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:38,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 09:06:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:38,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 09:06:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052499723] [2022-07-12 09:06:38,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052499723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 09:06:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593209739] [2022-07-12 09:06:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 09:06:38,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 09:06:38,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 09:06:38,979 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) [2022-07-12 09:06:38,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 09:06:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 09:06:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 09:06:39,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 09:06:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:39,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 09:06:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 09:06:39,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593209739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 09:06:39,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 09:06:39,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2022-07-12 09:06:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288518872] [2022-07-12 09:06:39,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 09:06:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-12 09:06:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 09:06:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-12 09:06:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-07-12 09:06:39,889 INFO L87 Difference]: Start difference. First operand 24721 states and 33951 transitions. Second operand has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 29 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) [2022-07-12 09:07:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 09:07:53,246 INFO L93 Difference]: Finished difference Result 514227 states and 685399 transitions. [2022-07-12 09:07:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2022-07-12 09:07:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.966666666666667) internal successors, (209), 29 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 81 [2022-07-12 09:07:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 09:07:54,324 INFO L225 Difference]: With dead ends: 514227 [2022-07-12 09:07:54,324 INFO L226 Difference]: Without dead ends: 491793 [2022-07-12 09:07:54,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43738 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=11400, Invalid=93252, Unknown=0, NotChecked=0, Total=104652 [2022-07-12 09:07:54,477 INFO L413 NwaCegarLoop]: 1706 mSDtfsCounter, 23774 mSDsluCounter, 12431 mSDsCounter, 0 mSdLazyCounter, 4020 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23774 SdHoareTripleChecker+Valid, 14137 SdHoareTripleChecker+Invalid, 4584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 4020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 09:07:54,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23774 Valid, 14137 Invalid, 4584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 4020 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 09:07:54,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491793 states.