./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.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 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:04:57,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:04:57,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:04:57,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:04:57,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:04:57,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:04:57,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:04:57,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:04:57,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:04:57,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:04:57,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:04:57,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:04:57,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:04:57,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:04:57,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:04:57,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:04:57,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:04:57,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:04:57,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:04:58,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:04:58,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:04:58,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:04:58,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:04:58,003 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:04:58,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:04:58,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:04:58,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:04:58,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:04:58,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:04:58,011 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:04:58,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:04:58,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:04:58,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:04:58,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:04:58,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:04:58,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:04:58,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:04:58,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:04:58,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:04:58,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:04:58,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:04:58,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:04:58,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:04:58,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:04:58,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:04:58,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:04:58,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:04:58,042 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:04:58,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:04:58,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:04:58,043 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:04:58,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:04:58,043 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:04:58,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:04:58,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:04:58,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:04:58,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:04:58,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:04:58,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:04:58,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:04:58,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:04:58,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:04:58,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:04:58,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:04:58,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:04:58,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:04:58,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:04:58,052 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:04:58,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:04:58,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:04:58,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:04:58,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 453217a894ab839ac749d51e6f81154421ad61236b47a16877fbef21d8ae30a8 [2021-12-22 12:04:58,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:04:58,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:04:58,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:04:58,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:04:58,260 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:04:58,260 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-22 12:04:58,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87be7b280/b3fffe6c0c3b431c87725d556c0da8c6/FLAG0b8e36e24 [2021-12-22 12:04:58,685 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:04:58,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-22 12:04:58,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87be7b280/b3fffe6c0c3b431c87725d556c0da8c6/FLAG0b8e36e24 [2021-12-22 12:04:58,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87be7b280/b3fffe6c0c3b431c87725d556c0da8c6 [2021-12-22 12:04:58,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:04:58,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:04:58,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:04:58,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:04:58,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:04:58,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:58" (1/1) ... [2021-12-22 12:04:58,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c733f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:58, skipping insertion in model container [2021-12-22 12:04:58,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:04:58" (1/1) ... [2021-12-22 12:04:58,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:04:58,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:04:58,913 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/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-12-22 12:04:58,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:04:58,972 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:04:59,005 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7253,7266] [2021-12-22 12:04:59,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:04:59,046 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:04:59,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59 WrapperNode [2021-12-22 12:04:59,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:04:59,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:04:59,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:04:59,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:04:59,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,090 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 649 [2021-12-22 12:04:59,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:04:59,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:04:59,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:04:59,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:04:59,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:04:59,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:04:59,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:04:59,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:04:59,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (1/1) ... [2021-12-22 12:04:59,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:04:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:04:59,148 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) [2021-12-22 12:04:59,149 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 [2021-12-22 12:04:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:04:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:04:59,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:04:59,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:04:59,247 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:04:59,248 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:04:59,615 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:04:59,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:04:59,626 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:04:59,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:59 BoogieIcfgContainer [2021-12-22 12:04:59,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:04:59,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:04:59,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:04:59,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:04:59,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:04:58" (1/3) ... [2021-12-22 12:04:59,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac36c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:59, skipping insertion in model container [2021-12-22 12:04:59,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:04:59" (2/3) ... [2021-12-22 12:04:59,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac36c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:04:59, skipping insertion in model container [2021-12-22 12:04:59,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:04:59" (3/3) ... [2021-12-22 12:04:59,648 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-12-22 12:04:59,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:04:59,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:04:59,699 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:04:59,705 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:04:59,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:04:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:04:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 12:04:59,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:04:59,734 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:04:59,734 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:04:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:04:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash 965210613, now seen corresponding path program 1 times [2021-12-22 12:04:59,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:04:59,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805357780] [2021-12-22 12:04:59,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:04:59,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:04:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:00,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:00,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805357780] [2021-12-22 12:05:00,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805357780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:00,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:00,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:00,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749918186] [2021-12-22 12:05:00,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:00,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:00,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:00,094 INFO L87 Difference]: Start difference. First operand has 171 states, 169 states have (on average 1.7218934911242603) internal successors, (291), 170 states have internal predecessors, (291), 0 states have call successors, (0), 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 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:00,298 INFO L93 Difference]: Finished difference Result 606 states and 981 transitions. [2021-12-22 12:05:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:00,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-22 12:05:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:00,320 INFO L225 Difference]: With dead ends: 606 [2021-12-22 12:05:00,320 INFO L226 Difference]: Without dead ends: 512 [2021-12-22 12:05:00,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 12:05:00,325 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 1755 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:00,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1755 Valid, 960 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:05:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-12-22 12:05:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 261. [2021-12-22 12:05:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.5) internal successors, (390), 260 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 390 transitions. [2021-12-22 12:05:00,401 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 390 transitions. Word has length 64 [2021-12-22 12:05:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:00,402 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 390 transitions. [2021-12-22 12:05:00,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 390 transitions. [2021-12-22 12:05:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 12:05:00,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:00,406 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:05:00,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:05:00,407 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash -404660772, now seen corresponding path program 1 times [2021-12-22 12:05:00,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:00,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064230356] [2021-12-22 12:05:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:00,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:00,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:00,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064230356] [2021-12-22 12:05:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064230356] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:00,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:00,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:00,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903571419] [2021-12-22 12:05:00,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:00,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:00,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:00,564 INFO L87 Difference]: Start difference. First operand 261 states and 390 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:00,740 INFO L93 Difference]: Finished difference Result 969 states and 1486 transitions. [2021-12-22 12:05:00,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-22 12:05:00,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:00,745 INFO L225 Difference]: With dead ends: 969 [2021-12-22 12:05:00,745 INFO L226 Difference]: Without dead ends: 767 [2021-12-22 12:05:00,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:00,757 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 895 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:00,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 848 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:05:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-12-22 12:05:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 761. [2021-12-22 12:05:00,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 1.5223684210526316) internal successors, (1157), 760 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1157 transitions. [2021-12-22 12:05:00,821 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1157 transitions. Word has length 65 [2021-12-22 12:05:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:00,822 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1157 transitions. [2021-12-22 12:05:00,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1157 transitions. [2021-12-22 12:05:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:05:00,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:00,828 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:05:00,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:05:00,830 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash 372471029, now seen corresponding path program 1 times [2021-12-22 12:05:00,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:00,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124170941] [2021-12-22 12:05:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:00,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:00,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124170941] [2021-12-22 12:05:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124170941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:00,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:00,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:05:00,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770544472] [2021-12-22 12:05:00,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:00,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:05:00,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:00,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:05:00,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:05:00,912 INFO L87 Difference]: Start difference. First operand 761 states and 1157 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:01,168 INFO L93 Difference]: Finished difference Result 2033 states and 3131 transitions. [2021-12-22 12:05:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:05:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:05:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:01,173 INFO L225 Difference]: With dead ends: 2033 [2021-12-22 12:05:01,173 INFO L226 Difference]: Without dead ends: 1319 [2021-12-22 12:05:01,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:05:01,175 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 937 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:01,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 233 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:05:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-12-22 12:05:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2021-12-22 12:05:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.5303951367781155) internal successors, (2014), 1316 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 2014 transitions. [2021-12-22 12:05:01,282 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 2014 transitions. Word has length 66 [2021-12-22 12:05:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 2014 transitions. [2021-12-22 12:05:01,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 2014 transitions. [2021-12-22 12:05:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:05:01,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:01,284 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:05:01,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:05:01,284 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:01,285 INFO L85 PathProgramCache]: Analyzing trace with hash 342598487, now seen corresponding path program 1 times [2021-12-22 12:05:01,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:01,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045046185] [2021-12-22 12:05:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:01,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:01,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:01,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045046185] [2021-12-22 12:05:01,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045046185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:01,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:01,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:05:01,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067834947] [2021-12-22 12:05:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:01,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:05:01,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:05:01,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:05:01,340 INFO L87 Difference]: Start difference. First operand 1317 states and 2014 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:01,608 INFO L93 Difference]: Finished difference Result 3529 states and 5448 transitions. [2021-12-22 12:05:01,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:05:01,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:05:01,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:01,616 INFO L225 Difference]: With dead ends: 3529 [2021-12-22 12:05:01,616 INFO L226 Difference]: Without dead ends: 2309 [2021-12-22 12:05:01,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:05:01,619 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 863 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:01,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 239 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:05:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-12-22 12:05:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2307. [2021-12-22 12:05:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2306 states have (on average 1.533391153512576) internal successors, (3536), 2306 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3536 transitions. [2021-12-22 12:05:01,775 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3536 transitions. Word has length 66 [2021-12-22 12:05:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:01,775 INFO L470 AbstractCegarLoop]: Abstraction has 2307 states and 3536 transitions. [2021-12-22 12:05:01,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3536 transitions. [2021-12-22 12:05:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 12:05:01,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:01,776 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:05:01,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:05:01,777 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash -440340154, now seen corresponding path program 1 times [2021-12-22 12:05:01,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:01,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441040947] [2021-12-22 12:05:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:01,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:01,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:01,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441040947] [2021-12-22 12:05:01,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441040947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:01,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:01,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:05:01,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974420742] [2021-12-22 12:05:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:01,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:05:01,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:01,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:05:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:05:01,858 INFO L87 Difference]: Start difference. First operand 2307 states and 3536 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:02,220 INFO L93 Difference]: Finished difference Result 6570 states and 10123 transitions. [2021-12-22 12:05:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 12:05:02,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-22 12:05:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:02,232 INFO L225 Difference]: With dead ends: 6570 [2021-12-22 12:05:02,232 INFO L226 Difference]: Without dead ends: 4333 [2021-12-22 12:05:02,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:05:02,235 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 893 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:02,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 235 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 12:05:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-12-22 12:05:02,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4331. [2021-12-22 12:05:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4331 states, 4330 states have (on average 1.530715935334873) internal successors, (6628), 4330 states have internal predecessors, (6628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6628 transitions. [2021-12-22 12:05:02,524 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6628 transitions. Word has length 66 [2021-12-22 12:05:02,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:02,525 INFO L470 AbstractCegarLoop]: Abstraction has 4331 states and 6628 transitions. [2021-12-22 12:05:02,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6628 transitions. [2021-12-22 12:05:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 12:05:02,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:02,529 INFO L514 BasicCegarLoop]: 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] [2021-12-22 12:05:02,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:05:02,529 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:02,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1058443688, now seen corresponding path program 1 times [2021-12-22 12:05:02,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:02,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682528694] [2021-12-22 12:05:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:02,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:02,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:02,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682528694] [2021-12-22 12:05:02,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682528694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:02,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:02,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 12:05:02,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056272714] [2021-12-22 12:05:02,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:02,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 12:05:02,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 12:05:02,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:05:02,629 INFO L87 Difference]: Start difference. First operand 4331 states and 6628 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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) [2021-12-22 12:05:03,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:03,184 INFO L93 Difference]: Finished difference Result 8381 states and 12813 transitions. [2021-12-22 12:05:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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 [2021-12-22 12:05:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:03,208 INFO L225 Difference]: With dead ends: 8381 [2021-12-22 12:05:03,208 INFO L226 Difference]: Without dead ends: 8379 [2021-12-22 12:05:03,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:03,212 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 228 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:03,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 935 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:03,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8379 states. [2021-12-22 12:05:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8379 to 4459. [2021-12-22 12:05:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4459 states, 4458 states have (on average 1.515477792732167) internal successors, (6756), 4458 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4459 states to 4459 states and 6756 transitions. [2021-12-22 12:05:03,590 INFO L78 Accepts]: Start accepts. Automaton has 4459 states and 6756 transitions. Word has length 67 [2021-12-22 12:05:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:03,590 INFO L470 AbstractCegarLoop]: Abstraction has 4459 states and 6756 transitions. [2021-12-22 12:05:03,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 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) [2021-12-22 12:05:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4459 states and 6756 transitions. [2021-12-22 12:05:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:05:03,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:03,592 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:03,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:05:03,592 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1287643169, now seen corresponding path program 1 times [2021-12-22 12:05:03,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084880555] [2021-12-22 12:05:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:03,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:03,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:03,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084880555] [2021-12-22 12:05:03,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084880555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:03,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:03,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 12:05:03,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390622150] [2021-12-22 12:05:03,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:03,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 12:05:03,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 12:05:03,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 12:05:03,727 INFO L87 Difference]: Start difference. First operand 4459 states and 6756 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:05,761 INFO L93 Difference]: Finished difference Result 19542 states and 29407 transitions. [2021-12-22 12:05:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-22 12:05:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-22 12:05:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:05,805 INFO L225 Difference]: With dead ends: 19542 [2021-12-22 12:05:05,805 INFO L226 Difference]: Without dead ends: 16828 [2021-12-22 12:05:05,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2021-12-22 12:05:05,813 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 2464 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2464 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:05,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2464 Valid, 1085 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 12:05:05,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16828 states. [2021-12-22 12:05:06,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16828 to 4554. [2021-12-22 12:05:06,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 1.5117504941796618) internal successors, (6883), 4553 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6883 transitions. [2021-12-22 12:05:06,284 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6883 transitions. Word has length 68 [2021-12-22 12:05:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:06,285 INFO L470 AbstractCegarLoop]: Abstraction has 4554 states and 6883 transitions. [2021-12-22 12:05:06,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6883 transitions. [2021-12-22 12:05:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 12:05:06,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:06,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:06,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:05:06,287 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -106958945, now seen corresponding path program 1 times [2021-12-22 12:05:06,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:06,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159650193] [2021-12-22 12:05:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:06,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:06,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159650193] [2021-12-22 12:05:06,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159650193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:06,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:06,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:05:06,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890012354] [2021-12-22 12:05:06,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:06,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:05:06,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:06,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:05:06,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:05:06,344 INFO L87 Difference]: Start difference. First operand 4554 states and 6883 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:07,017 INFO L93 Difference]: Finished difference Result 12206 states and 18485 transitions. [2021-12-22 12:05:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:05:07,018 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-22 12:05:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:07,030 INFO L225 Difference]: With dead ends: 12206 [2021-12-22 12:05:07,030 INFO L226 Difference]: Without dead ends: 8156 [2021-12-22 12:05:07,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:05:07,034 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 233 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:07,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 582 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:07,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8156 states. [2021-12-22 12:05:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8156 to 8154. [2021-12-22 12:05:07,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8154 states, 8153 states have (on average 1.5006745983073715) internal successors, (12235), 8153 states have internal predecessors, (12235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8154 states to 8154 states and 12235 transitions. [2021-12-22 12:05:07,783 INFO L78 Accepts]: Start accepts. Automaton has 8154 states and 12235 transitions. Word has length 68 [2021-12-22 12:05:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:07,783 INFO L470 AbstractCegarLoop]: Abstraction has 8154 states and 12235 transitions. [2021-12-22 12:05:07,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 8154 states and 12235 transitions. [2021-12-22 12:05:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:07,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:07,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:07,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:05:07,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 494119873, now seen corresponding path program 1 times [2021-12-22 12:05:07,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:07,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829860230] [2021-12-22 12:05:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:07,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:07,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:07,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829860230] [2021-12-22 12:05:07,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829860230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:07,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:07,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:05:07,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350432915] [2021-12-22 12:05:07,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:07,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:05:07,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:07,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:05:07,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:05:07,814 INFO L87 Difference]: Start difference. First operand 8154 states and 12235 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:08,700 INFO L93 Difference]: Finished difference Result 14045 states and 21073 transitions. [2021-12-22 12:05:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:05:08,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:08,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:08,714 INFO L225 Difference]: With dead ends: 14045 [2021-12-22 12:05:08,715 INFO L226 Difference]: Without dead ends: 9847 [2021-12-22 12:05:08,721 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:08,721 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 147 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:08,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 456 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9847 states. [2021-12-22 12:05:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9847 to 9725. [2021-12-22 12:05:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9725 states, 9724 states have (on average 1.4762443438914028) internal successors, (14355), 9724 states have internal predecessors, (14355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9725 states to 9725 states and 14355 transitions. [2021-12-22 12:05:09,568 INFO L78 Accepts]: Start accepts. Automaton has 9725 states and 14355 transitions. Word has length 69 [2021-12-22 12:05:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:09,568 INFO L470 AbstractCegarLoop]: Abstraction has 9725 states and 14355 transitions. [2021-12-22 12:05:09,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9725 states and 14355 transitions. [2021-12-22 12:05:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:09,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:09,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:09,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:05:09,571 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash -760950752, now seen corresponding path program 1 times [2021-12-22 12:05:09,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:09,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531870990] [2021-12-22 12:05:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:09,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:09,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:09,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531870990] [2021-12-22 12:05:09,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531870990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:09,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:09,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:09,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261817690] [2021-12-22 12:05:09,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:09,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:09,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:09,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:09,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:09,613 INFO L87 Difference]: Start difference. First operand 9725 states and 14355 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:11,065 INFO L93 Difference]: Finished difference Result 18494 states and 27406 transitions. [2021-12-22 12:05:11,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:11,090 INFO L225 Difference]: With dead ends: 18494 [2021-12-22 12:05:11,091 INFO L226 Difference]: Without dead ends: 17004 [2021-12-22 12:05:11,097 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:11,098 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 996 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:11,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1096 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17004 states. [2021-12-22 12:05:12,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17004 to 11195. [2021-12-22 12:05:12,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11195 states, 11194 states have (on average 1.4744505985349294) internal successors, (16505), 11194 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11195 states to 11195 states and 16505 transitions. [2021-12-22 12:05:12,353 INFO L78 Accepts]: Start accepts. Automaton has 11195 states and 16505 transitions. Word has length 69 [2021-12-22 12:05:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:12,354 INFO L470 AbstractCegarLoop]: Abstraction has 11195 states and 16505 transitions. [2021-12-22 12:05:12,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11195 states and 16505 transitions. [2021-12-22 12:05:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:12,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:12,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:12,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:05:12,356 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 192736000, now seen corresponding path program 1 times [2021-12-22 12:05:12,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308227439] [2021-12-22 12:05:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:12,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:12,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308227439] [2021-12-22 12:05:12,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308227439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:12,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:12,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:05:12,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659770276] [2021-12-22 12:05:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:12,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:05:12,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:12,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:05:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:05:12,382 INFO L87 Difference]: Start difference. First operand 11195 states and 16505 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:13,605 INFO L93 Difference]: Finished difference Result 22630 states and 33315 transitions. [2021-12-22 12:05:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:05:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:13,627 INFO L225 Difference]: With dead ends: 22630 [2021-12-22 12:05:13,627 INFO L226 Difference]: Without dead ends: 13651 [2021-12-22 12:05:13,637 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:13,637 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 154 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:13,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 471 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13651 states. [2021-12-22 12:05:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13651 to 13509. [2021-12-22 12:05:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13509 states, 13508 states have (on average 1.4427746520580398) internal successors, (19489), 13508 states have internal predecessors, (19489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13509 states to 13509 states and 19489 transitions. [2021-12-22 12:05:14,931 INFO L78 Accepts]: Start accepts. Automaton has 13509 states and 19489 transitions. Word has length 69 [2021-12-22 12:05:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:14,931 INFO L470 AbstractCegarLoop]: Abstraction has 13509 states and 19489 transitions. [2021-12-22 12:05:14,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13509 states and 19489 transitions. [2021-12-22 12:05:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:14,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:14,934 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:14,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 12:05:14,934 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -334349023, now seen corresponding path program 1 times [2021-12-22 12:05:14,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:14,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2156389] [2021-12-22 12:05:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:14,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:14,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:14,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2156389] [2021-12-22 12:05:14,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2156389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:14,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:14,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:05:14,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876060440] [2021-12-22 12:05:14,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:14,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:05:14,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:05:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:05:14,959 INFO L87 Difference]: Start difference. First operand 13509 states and 19489 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:17,340 INFO L93 Difference]: Finished difference Result 33983 states and 48932 transitions. [2021-12-22 12:05:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:05:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:17,368 INFO L225 Difference]: With dead ends: 33983 [2021-12-22 12:05:17,368 INFO L226 Difference]: Without dead ends: 22473 [2021-12-22 12:05:17,377 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:17,377 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 161 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:17,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 454 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22473 states. [2021-12-22 12:05:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22473 to 22471. [2021-12-22 12:05:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22471 states, 22470 states have (on average 1.4213173119715177) internal successors, (31937), 22470 states have internal predecessors, (31937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22471 states to 22471 states and 31937 transitions. [2021-12-22 12:05:19,538 INFO L78 Accepts]: Start accepts. Automaton has 22471 states and 31937 transitions. Word has length 69 [2021-12-22 12:05:19,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:19,538 INFO L470 AbstractCegarLoop]: Abstraction has 22471 states and 31937 transitions. [2021-12-22 12:05:19,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:19,539 INFO L276 IsEmpty]: Start isEmpty. Operand 22471 states and 31937 transitions. [2021-12-22 12:05:19,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:19,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:19,542 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:19,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 12:05:19,542 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1412359137, now seen corresponding path program 1 times [2021-12-22 12:05:19,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:19,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539003822] [2021-12-22 12:05:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:19,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:19,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:19,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:19,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539003822] [2021-12-22 12:05:19,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539003822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:19,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:19,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:19,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802733357] [2021-12-22 12:05:19,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:19,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:19,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:19,584 INFO L87 Difference]: Start difference. First operand 22471 states and 31937 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:23,386 INFO L93 Difference]: Finished difference Result 44005 states and 62924 transitions. [2021-12-22 12:05:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:23,441 INFO L225 Difference]: With dead ends: 44005 [2021-12-22 12:05:23,441 INFO L226 Difference]: Without dead ends: 38867 [2021-12-22 12:05:23,456 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:23,457 INFO L933 BasicCegarLoop]: 362 mSDtfsCounter, 985 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:23,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 1295 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38867 states. [2021-12-22 12:05:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38867 to 27565. [2021-12-22 12:05:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27565 states, 27564 states have (on average 1.421092729647366) internal successors, (39171), 27564 states have internal predecessors, (39171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27565 states to 27565 states and 39171 transitions. [2021-12-22 12:05:26,403 INFO L78 Accepts]: Start accepts. Automaton has 27565 states and 39171 transitions. Word has length 69 [2021-12-22 12:05:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:26,403 INFO L470 AbstractCegarLoop]: Abstraction has 27565 states and 39171 transitions. [2021-12-22 12:05:26,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27565 states and 39171 transitions. [2021-12-22 12:05:26,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-22 12:05:26,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:26,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:26,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 12:05:26,407 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash -677295103, now seen corresponding path program 1 times [2021-12-22 12:05:26,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:26,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528524921] [2021-12-22 12:05:26,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:26,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:26,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:26,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528524921] [2021-12-22 12:05:26,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528524921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:26,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:26,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:26,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166537546] [2021-12-22 12:05:26,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:26,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:26,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:26,483 INFO L87 Difference]: Start difference. First operand 27565 states and 39171 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:31,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:31,199 INFO L93 Difference]: Finished difference Result 52793 states and 75507 transitions. [2021-12-22 12:05:31,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:31,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-22 12:05:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:31,260 INFO L225 Difference]: With dead ends: 52793 [2021-12-22 12:05:31,260 INFO L226 Difference]: Without dead ends: 43871 [2021-12-22 12:05:31,279 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:31,280 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 1066 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1066 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:31,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1066 Valid, 1197 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43871 states. [2021-12-22 12:05:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43871 to 33669. [2021-12-22 12:05:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33669 states, 33668 states have (on average 1.4223892123084234) internal successors, (47889), 33668 states have internal predecessors, (47889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:35,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33669 states to 33669 states and 47889 transitions. [2021-12-22 12:05:35,064 INFO L78 Accepts]: Start accepts. Automaton has 33669 states and 47889 transitions. Word has length 69 [2021-12-22 12:05:35,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:35,064 INFO L470 AbstractCegarLoop]: Abstraction has 33669 states and 47889 transitions. [2021-12-22 12:05:35,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:35,064 INFO L276 IsEmpty]: Start isEmpty. Operand 33669 states and 47889 transitions. [2021-12-22 12:05:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 12:05:35,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:35,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:35,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 12:05:35,067 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:35,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1338735588, now seen corresponding path program 1 times [2021-12-22 12:05:35,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:35,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894080795] [2021-12-22 12:05:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:35,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:35,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:35,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894080795] [2021-12-22 12:05:35,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894080795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:35,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:35,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:35,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540682180] [2021-12-22 12:05:35,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:35,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 12:05:35,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:35,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 12:05:35,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 12:05:35,114 INFO L87 Difference]: Start difference. First operand 33669 states and 47889 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:40,862 INFO L93 Difference]: Finished difference Result 58573 states and 83680 transitions. [2021-12-22 12:05:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 12:05:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-22 12:05:40,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:40,948 INFO L225 Difference]: With dead ends: 58573 [2021-12-22 12:05:40,948 INFO L226 Difference]: Without dead ends: 51179 [2021-12-22 12:05:40,965 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:40,966 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 1055 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:40,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1038 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:40,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51179 states. [2021-12-22 12:05:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51179 to 37881. [2021-12-22 12:05:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37881 states, 37880 states have (on average 1.4250791974656811) internal successors, (53982), 37880 states have internal predecessors, (53982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37881 states to 37881 states and 53982 transitions. [2021-12-22 12:05:45,490 INFO L78 Accepts]: Start accepts. Automaton has 37881 states and 53982 transitions. Word has length 70 [2021-12-22 12:05:45,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:45,490 INFO L470 AbstractCegarLoop]: Abstraction has 37881 states and 53982 transitions. [2021-12-22 12:05:45,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:45,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37881 states and 53982 transitions. [2021-12-22 12:05:45,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 12:05:45,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:45,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:45,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 12:05:45,494 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:45,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:45,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2011557288, now seen corresponding path program 1 times [2021-12-22 12:05:45,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:45,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352965080] [2021-12-22 12:05:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:45,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:45,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:45,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352965080] [2021-12-22 12:05:45,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352965080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:45,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:45,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:05:45,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125433180] [2021-12-22 12:05:45,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:45,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:05:45,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:05:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:05:45,528 INFO L87 Difference]: Start difference. First operand 37881 states and 53982 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:05:49,976 INFO L93 Difference]: Finished difference Result 56257 states and 79672 transitions. [2021-12-22 12:05:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:05:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-12-22 12:05:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:05:50,031 INFO L225 Difference]: With dead ends: 56257 [2021-12-22 12:05:50,031 INFO L226 Difference]: Without dead ends: 36223 [2021-12-22 12:05:50,057 INFO L932 BasicCegarLoop]: 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 [2021-12-22 12:05:50,057 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 131 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:05:50,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 501 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:05:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36223 states. [2021-12-22 12:05:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36223 to 32027. [2021-12-22 12:05:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32027 states, 32026 states have (on average 1.3957409604696185) internal successors, (44700), 32026 states have internal predecessors, (44700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32027 states to 32027 states and 44700 transitions. [2021-12-22 12:05:54,402 INFO L78 Accepts]: Start accepts. Automaton has 32027 states and 44700 transitions. Word has length 72 [2021-12-22 12:05:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:05:54,402 INFO L470 AbstractCegarLoop]: Abstraction has 32027 states and 44700 transitions. [2021-12-22 12:05:54,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:05:54,402 INFO L276 IsEmpty]: Start isEmpty. Operand 32027 states and 44700 transitions. [2021-12-22 12:05:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 12:05:54,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:05:54,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 12:05:54,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 12:05:54,407 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:05:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:05:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash 377435358, now seen corresponding path program 1 times [2021-12-22 12:05:54,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:05:54,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634268373] [2021-12-22 12:05:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:05:54,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:05:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:05:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:05:54,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:05:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634268373] [2021-12-22 12:05:54,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634268373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:05:54,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:05:54,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 12:05:54,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125735441] [2021-12-22 12:05:54,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:05:54,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:05:54,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:05:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:05:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:05:54,480 INFO L87 Difference]: Start difference. First operand 32027 states and 44700 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)