./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label16.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 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:57:59,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:57:59,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:57:59,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:57:59,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:57:59,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:57:59,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:57:59,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:57:59,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:57:59,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:57:59,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:57:59,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:57:59,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:57:59,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:57:59,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:57:59,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:57:59,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:57:59,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:57:59,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:57:59,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:57:59,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:57:59,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:57:59,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:57:59,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:57:59,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:57:59,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:57:59,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:57:59,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:57:59,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:57:59,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:57:59,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:57:59,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:57:59,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:57:59,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:57:59,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:57:59,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:57:59,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:57:59,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:57:59,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:57:59,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:57:59,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:57:59,932 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:57:59,954 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:57:59,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:57:59,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:57:59,955 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:57:59,956 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:57:59,956 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:57:59,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:57:59,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:57:59,957 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:57:59,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:57:59,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:57:59,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:57:59,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:57:59,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:57:59,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:57:59,961 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:57:59,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:57:59,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:57:59,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12946011ae947529b791d0ea774eddb13cd60d584cd7e2008a422f41653953d6 [2021-12-15 09:58:00,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:58:00,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:58:00,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:58:00,190 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:58:00,190 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:58:00,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2021-12-15 09:58:00,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c36a1390/802571e00b6b42d3a1a869dc8068796d/FLAG547b0ad25 [2021-12-15 09:58:00,688 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:58:00,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label16.c [2021-12-15 09:58:00,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c36a1390/802571e00b6b42d3a1a869dc8068796d/FLAG547b0ad25 [2021-12-15 09:58:00,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c36a1390/802571e00b6b42d3a1a869dc8068796d [2021-12-15 09:58:00,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:58:00,995 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:58:00,997 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:58:00,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:58:01,001 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:58:01,002 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:58:00" (1/1) ... [2021-12-15 09:58:01,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293a463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01, skipping insertion in model container [2021-12-15 09:58:01,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:58:00" (1/1) ... [2021-12-15 09:58:01,009 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:58:01,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:58:01,294 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label16.c[3929,3942] [2021-12-15 09:58:01,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:58:01,664 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:58:01,681 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label16.c[3929,3942] [2021-12-15 09:58:01,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:58:01,863 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:58:01,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01 WrapperNode [2021-12-15 09:58:01,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:58:01,865 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:58:01,865 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:58:01,865 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:58:01,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:01,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,215 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 09:58:02,215 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:58:02,216 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:58:02,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:58:02,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:58:02,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:58:02,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:58:02,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:58:02,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:58:02,614 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (1/1) ... [2021-12-15 09:58:02,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:58:02,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:58:02,635 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) [2021-12-15 09:58:02,652 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 [2021-12-15 09:58:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:58:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:58:02,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:58:02,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:58:02,739 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:58:02,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:58:04,858 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:58:04,873 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:58:04,874 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:58:04,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:58:04 BoogieIcfgContainer [2021-12-15 09:58:04,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:58:04,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:58:04,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:58:04,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:58:04,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:58:00" (1/3) ... [2021-12-15 09:58:04,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc87b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:58:04, skipping insertion in model container [2021-12-15 09:58:04,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:58:01" (2/3) ... [2021-12-15 09:58:04,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dc87b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:58:04, skipping insertion in model container [2021-12-15 09:58:04,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:58:04" (3/3) ... [2021-12-15 09:58:04,882 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label16.c [2021-12-15 09:58:04,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:58:04,886 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:58:04,927 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:58:04,933 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 [2021-12-15 09:58:04,933 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:58:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 09:58:04,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:04,961 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] [2021-12-15 09:58:04,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2021-12-15 09:58:04,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:04,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688398167] [2021-12-15 09:58:04,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:04,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:58:05,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:05,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688398167] [2021-12-15 09:58:05,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688398167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:05,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:05,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:58:05,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463692237] [2021-12-15 09:58:05,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:05,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:05,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:05,171 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:07,218 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2021-12-15 09:58:07,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-15 09:58:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:07,232 INFO L225 Difference]: With dead ends: 1644 [2021-12-15 09:58:07,232 INFO L226 Difference]: Without dead ends: 977 [2021-12-15 09:58:07,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:07,239 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 463 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:07,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:58:07,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-12-15 09:58:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2021-12-15 09:58:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:07,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2021-12-15 09:58:07,292 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 25 [2021-12-15 09:58:07,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2021-12-15 09:58:07,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2021-12-15 09:58:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-15 09:58:07,295 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:07,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:07,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:58:07,295 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1947080830, now seen corresponding path program 1 times [2021-12-15 09:58:07,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805534397] [2021-12-15 09:58:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:07,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:58:07,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805534397] [2021-12-15 09:58:07,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805534397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:07,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:07,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:58:07,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676208301] [2021-12-15 09:58:07,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:07,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:07,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:07,424 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:09,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:09,481 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2021-12-15 09:58:09,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-15 09:58:09,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:09,487 INFO L225 Difference]: With dead ends: 2813 [2021-12-15 09:58:09,487 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 09:58:09,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:09,489 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:09,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-15 09:58:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 09:58:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2021-12-15 09:58:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:09,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2021-12-15 09:58:09,520 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 92 [2021-12-15 09:58:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:09,522 INFO L470 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2021-12-15 09:58:09,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2021-12-15 09:58:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 09:58:09,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:09,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:09,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:58:09,530 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:09,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1701944076, now seen corresponding path program 1 times [2021-12-15 09:58:09,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383355261] [2021-12-15 09:58:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:09,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:58:09,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383355261] [2021-12-15 09:58:09,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383355261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:09,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:09,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:09,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670345796] [2021-12-15 09:58:09,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:09,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:58:09,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:09,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:58:09,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:58:09,657 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:12,844 INFO L93 Difference]: Finished difference Result 6767 states and 9259 transitions. [2021-12-15 09:58:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:58:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-15 09:58:12,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:12,861 INFO L225 Difference]: With dead ends: 6767 [2021-12-15 09:58:12,862 INFO L226 Difference]: Without dead ends: 4928 [2021-12-15 09:58:12,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:58:12,869 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 890 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2790 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:12,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 328 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2790 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:58:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-12-15 09:58:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4875. [2021-12-15 09:58:12,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.2866228970045137) internal successors, (6271), 4874 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 6271 transitions. [2021-12-15 09:58:12,931 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 6271 transitions. Word has length 95 [2021-12-15 09:58:12,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:12,932 INFO L470 AbstractCegarLoop]: Abstraction has 4875 states and 6271 transitions. [2021-12-15 09:58:12,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:12,933 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 6271 transitions. [2021-12-15 09:58:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-15 09:58:12,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:12,939 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:12,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:58:12,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash -106790988, now seen corresponding path program 1 times [2021-12-15 09:58:12,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896107511] [2021-12-15 09:58:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:12,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 09:58:13,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:13,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896107511] [2021-12-15 09:58:13,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896107511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:13,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:13,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:58:13,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943288410] [2021-12-15 09:58:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:13,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:13,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:13,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:13,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:13,071 INFO L87 Difference]: Start difference. First operand 4875 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:14,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:14,825 INFO L93 Difference]: Finished difference Result 14436 states and 18544 transitions. [2021-12-15 09:58:14,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:14,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 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 164 [2021-12-15 09:58:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:14,845 INFO L225 Difference]: With dead ends: 14436 [2021-12-15 09:58:14,846 INFO L226 Difference]: Without dead ends: 8277 [2021-12-15 09:58:14,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:14,859 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:14,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:58:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2021-12-15 09:58:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 6576. [2021-12-15 09:58:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 1.1793155893536122) internal successors, (7754), 6575 states have internal predecessors, (7754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 7754 transitions. [2021-12-15 09:58:14,964 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 7754 transitions. Word has length 164 [2021-12-15 09:58:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:14,965 INFO L470 AbstractCegarLoop]: Abstraction has 6576 states and 7754 transitions. [2021-12-15 09:58:14,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 7754 transitions. [2021-12-15 09:58:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-12-15 09:58:14,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:14,967 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:14,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:58:14,968 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:14,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:14,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1141369514, now seen corresponding path program 1 times [2021-12-15 09:58:14,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:14,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805777433] [2021-12-15 09:58:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:14,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:58:15,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805777433] [2021-12-15 09:58:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805777433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:15,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:15,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:15,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611562850] [2021-12-15 09:58:15,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:15,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:15,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:15,062 INFO L87 Difference]: Start difference. First operand 6576 states and 7754 transitions. Second operand has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:16,580 INFO L93 Difference]: Finished difference Result 16560 states and 19931 transitions. [2021-12-15 09:58:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 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 177 [2021-12-15 09:58:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:16,612 INFO L225 Difference]: With dead ends: 16560 [2021-12-15 09:58:16,612 INFO L226 Difference]: Without dead ends: 9986 [2021-12-15 09:58:16,621 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 [2021-12-15 09:58:16,621 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:16,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 801 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 09:58:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9986 states. [2021-12-15 09:58:16,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9986 to 9986. [2021-12-15 09:58:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 1.1696544817225838) internal successors, (11679), 9985 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:16,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 11679 transitions. [2021-12-15 09:58:16,743 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 11679 transitions. Word has length 177 [2021-12-15 09:58:16,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:16,744 INFO L470 AbstractCegarLoop]: Abstraction has 9986 states and 11679 transitions. [2021-12-15 09:58:16,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:16,747 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 11679 transitions. [2021-12-15 09:58:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-15 09:58:16,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:16,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:16,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:58:16,749 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:16,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash 3113787, now seen corresponding path program 1 times [2021-12-15 09:58:16,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:16,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495031274] [2021-12-15 09:58:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:16,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:58:16,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:16,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495031274] [2021-12-15 09:58:16,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495031274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:16,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:16,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:16,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808006677] [2021-12-15 09:58:16,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:16,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:16,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:16,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:16,904 INFO L87 Difference]: Start difference. First operand 9986 states and 11679 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:18,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:18,528 INFO L93 Difference]: Finished difference Result 25067 states and 29587 transitions. [2021-12-15 09:58:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:18,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 179 [2021-12-15 09:58:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:18,569 INFO L225 Difference]: With dead ends: 25067 [2021-12-15 09:58:18,569 INFO L226 Difference]: Without dead ends: 15083 [2021-12-15 09:58:18,580 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 [2021-12-15 09:58:18,582 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 429 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:18,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 486 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:58:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15083 states. [2021-12-15 09:58:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15083 to 10384. [2021-12-15 09:58:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10384 states, 10383 states have (on average 1.1651738418568813) internal successors, (12098), 10383 states have internal predecessors, (12098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10384 states to 10384 states and 12098 transitions. [2021-12-15 09:58:18,715 INFO L78 Accepts]: Start accepts. Automaton has 10384 states and 12098 transitions. Word has length 179 [2021-12-15 09:58:18,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:18,716 INFO L470 AbstractCegarLoop]: Abstraction has 10384 states and 12098 transitions. [2021-12-15 09:58:18,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 10384 states and 12098 transitions. [2021-12-15 09:58:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-15 09:58:18,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:18,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:18,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:58:18,718 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1690682791, now seen corresponding path program 1 times [2021-12-15 09:58:18,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:18,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652405279] [2021-12-15 09:58:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:18,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:58:18,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:18,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652405279] [2021-12-15 09:58:18,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652405279] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:18,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:18,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:18,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186105957] [2021-12-15 09:58:18,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:18,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:18,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:18,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:18,792 INFO L87 Difference]: Start difference. First operand 10384 states and 12098 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:20,622 INFO L93 Difference]: Finished difference Result 25874 states and 30417 transitions. [2021-12-15 09:58:20,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:20,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 192 [2021-12-15 09:58:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:20,647 INFO L225 Difference]: With dead ends: 25874 [2021-12-15 09:58:20,647 INFO L226 Difference]: Without dead ends: 15492 [2021-12-15 09:58:20,658 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 [2021-12-15 09:58:20,660 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 453 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:20,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 448 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:58:20,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15492 states. [2021-12-15 09:58:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15492 to 13778. [2021-12-15 09:58:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13778 states, 13777 states have (on average 1.166509399724178) internal successors, (16071), 13777 states have internal predecessors, (16071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13778 states to 13778 states and 16071 transitions. [2021-12-15 09:58:20,840 INFO L78 Accepts]: Start accepts. Automaton has 13778 states and 16071 transitions. Word has length 192 [2021-12-15 09:58:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:20,840 INFO L470 AbstractCegarLoop]: Abstraction has 13778 states and 16071 transitions. [2021-12-15 09:58:20,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 13778 states and 16071 transitions. [2021-12-15 09:58:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:58:20,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:20,844 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:20,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:58:20,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1691584357, now seen corresponding path program 1 times [2021-12-15 09:58:20,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:20,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603014859] [2021-12-15 09:58:20,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:20,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 09:58:20,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:20,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603014859] [2021-12-15 09:58:20,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603014859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:20,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:20,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:20,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086260573] [2021-12-15 09:58:20,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:20,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:20,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:20,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:20,922 INFO L87 Difference]: Start difference. First operand 13778 states and 16071 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:23,473 INFO L93 Difference]: Finished difference Result 32234 states and 37932 transitions. [2021-12-15 09:58:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:23,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 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 224 [2021-12-15 09:58:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:23,496 INFO L225 Difference]: With dead ends: 32234 [2021-12-15 09:58:23,496 INFO L226 Difference]: Without dead ends: 18458 [2021-12-15 09:58:23,508 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 [2021-12-15 09:58:23,509 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 467 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:23,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 416 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:58:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18458 states. [2021-12-15 09:58:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18458 to 17176. [2021-12-15 09:58:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17176 states, 17175 states have (on average 1.1833478893740903) internal successors, (20324), 17175 states have internal predecessors, (20324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17176 states to 17176 states and 20324 transitions. [2021-12-15 09:58:23,665 INFO L78 Accepts]: Start accepts. Automaton has 17176 states and 20324 transitions. Word has length 224 [2021-12-15 09:58:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:23,665 INFO L470 AbstractCegarLoop]: Abstraction has 17176 states and 20324 transitions. [2021-12-15 09:58:23,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 17176 states and 20324 transitions. [2021-12-15 09:58:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 09:58:23,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:23,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:23,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:58:23,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:23,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:23,670 INFO L85 PathProgramCache]: Analyzing trace with hash 852276715, now seen corresponding path program 1 times [2021-12-15 09:58:23,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:23,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825756640] [2021-12-15 09:58:23,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:23,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:23,764 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:58:23,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:23,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825756640] [2021-12-15 09:58:23,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825756640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:23,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:23,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:23,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732730378] [2021-12-15 09:58:23,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:23,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:23,767 INFO L87 Difference]: Start difference. First operand 17176 states and 20324 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:25,572 INFO L93 Difference]: Finished difference Result 39057 states and 46415 transitions. [2021-12-15 09:58:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 241 [2021-12-15 09:58:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:25,605 INFO L225 Difference]: With dead ends: 39057 [2021-12-15 09:58:25,605 INFO L226 Difference]: Without dead ends: 21458 [2021-12-15 09:58:25,619 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 [2021-12-15 09:58:25,619 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 356 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:25,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 864 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 09:58:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21458 states. [2021-12-15 09:58:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21458 to 21025. [2021-12-15 09:58:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21025 states, 21024 states have (on average 1.1667142313546424) internal successors, (24529), 21024 states have internal predecessors, (24529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:25,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21025 states to 21025 states and 24529 transitions. [2021-12-15 09:58:25,852 INFO L78 Accepts]: Start accepts. Automaton has 21025 states and 24529 transitions. Word has length 241 [2021-12-15 09:58:25,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:25,852 INFO L470 AbstractCegarLoop]: Abstraction has 21025 states and 24529 transitions. [2021-12-15 09:58:25,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 21025 states and 24529 transitions. [2021-12-15 09:58:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-15 09:58:25,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:25,860 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:25,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:58:25,860 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1233843982, now seen corresponding path program 1 times [2021-12-15 09:58:25,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:25,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020617205] [2021-12-15 09:58:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:25,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 09:58:25,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020617205] [2021-12-15 09:58:25,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020617205] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:58:25,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709983740] [2021-12-15 09:58:25,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:25,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:58:25,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:58:25,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:58:25,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:58:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:58:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:58:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 184 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 09:58:26,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:58:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 09:58:27,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709983740] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:58:27,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:58:27,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 09:58:27,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043187246] [2021-12-15 09:58:27,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:27,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:58:27,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:27,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:58:27,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:27,464 INFO L87 Difference]: Start difference. First operand 21025 states and 24529 transitions. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:30,441 INFO L93 Difference]: Finished difference Result 59100 states and 69388 transitions. [2021-12-15 09:58:30,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:58:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 249 [2021-12-15 09:58:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:30,500 INFO L225 Difference]: With dead ends: 59100 [2021-12-15 09:58:30,500 INFO L226 Difference]: Without dead ends: 37213 [2021-12-15 09:58:30,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:30,516 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 879 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 2289 mSolverCounterSat, 727 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 727 IncrementalHoareTripleChecker+Valid, 2289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:30,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 158 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [727 Valid, 2289 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:58:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37213 states. [2021-12-15 09:58:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37213 to 35506. [2021-12-15 09:58:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35506 states, 35505 states have (on average 1.1591043514997887) internal successors, (41154), 35505 states have internal predecessors, (41154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35506 states to 35506 states and 41154 transitions. [2021-12-15 09:58:30,833 INFO L78 Accepts]: Start accepts. Automaton has 35506 states and 41154 transitions. Word has length 249 [2021-12-15 09:58:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:30,833 INFO L470 AbstractCegarLoop]: Abstraction has 35506 states and 41154 transitions. [2021-12-15 09:58:30,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 35506 states and 41154 transitions. [2021-12-15 09:58:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-15 09:58:30,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:30,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:30,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 09:58:31,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 09:58:31,052 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1742275879, now seen corresponding path program 1 times [2021-12-15 09:58:31,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:31,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466078253] [2021-12-15 09:58:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:31,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 09:58:31,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466078253] [2021-12-15 09:58:31,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466078253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:31,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:31,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:31,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122265340] [2021-12-15 09:58:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:31,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:31,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:31,123 INFO L87 Difference]: Start difference. First operand 35506 states and 41154 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:32,568 INFO L93 Difference]: Finished difference Result 78654 states and 91329 transitions. [2021-12-15 09:58:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:32,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-12-15 09:58:32,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:32,612 INFO L225 Difference]: With dead ends: 78654 [2021-12-15 09:58:32,612 INFO L226 Difference]: Without dead ends: 42723 [2021-12-15 09:58:32,634 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 [2021-12-15 09:58:32,634 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 380 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:32,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 850 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:58:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-12-15 09:58:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 42723. [2021-12-15 09:58:32,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42723 states, 42722 states have (on average 1.1170825335892514) internal successors, (47724), 42722 states have internal predecessors, (47724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42723 states to 42723 states and 47724 transitions. [2021-12-15 09:58:33,040 INFO L78 Accepts]: Start accepts. Automaton has 42723 states and 47724 transitions. Word has length 257 [2021-12-15 09:58:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:33,041 INFO L470 AbstractCegarLoop]: Abstraction has 42723 states and 47724 transitions. [2021-12-15 09:58:33,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 42723 states and 47724 transitions. [2021-12-15 09:58:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2021-12-15 09:58:33,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:33,045 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:33,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:58:33,046 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2014465041, now seen corresponding path program 1 times [2021-12-15 09:58:33,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021126637] [2021-12-15 09:58:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:33,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:33,163 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:58:33,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:33,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021126637] [2021-12-15 09:58:33,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021126637] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:58:33,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362146620] [2021-12-15 09:58:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:33,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:58:33,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:58:33,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:58:33,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:58:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:58:33,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:58:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 325 proven. 73 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:58:33,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:58:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 398 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 09:58:34,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362146620] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 09:58:34,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 09:58:34,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2021-12-15 09:58:34,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70933895] [2021-12-15 09:58:34,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:34,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:58:34,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:58:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:34,468 INFO L87 Difference]: Start difference. First operand 42723 states and 47724 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:37,203 INFO L93 Difference]: Finished difference Result 101643 states and 113664 transitions. [2021-12-15 09:58:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:58:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 323 [2021-12-15 09:58:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:37,279 INFO L225 Difference]: With dead ends: 101643 [2021-12-15 09:58:37,279 INFO L226 Difference]: Without dead ends: 58493 [2021-12-15 09:58:37,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 641 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:37,310 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 841 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:37,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 189 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:58:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58493 states. [2021-12-15 09:58:37,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58493 to 55940. [2021-12-15 09:58:37,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55940 states, 55939 states have (on average 1.1210604408373406) internal successors, (62711), 55939 states have internal predecessors, (62711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:38,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55940 states to 55940 states and 62711 transitions. [2021-12-15 09:58:38,048 INFO L78 Accepts]: Start accepts. Automaton has 55940 states and 62711 transitions. Word has length 323 [2021-12-15 09:58:38,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:38,049 INFO L470 AbstractCegarLoop]: Abstraction has 55940 states and 62711 transitions. [2021-12-15 09:58:38,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 55940 states and 62711 transitions. [2021-12-15 09:58:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2021-12-15 09:58:38,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:38,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:38,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 09:58:38,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:58:38,273 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:38,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1093920703, now seen corresponding path program 1 times [2021-12-15 09:58:38,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688284355] [2021-12-15 09:58:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:38,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 352 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-12-15 09:58:38,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:38,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688284355] [2021-12-15 09:58:38,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688284355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:38,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:38,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:38,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375021477] [2021-12-15 09:58:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:38,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:38,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:38,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:38,383 INFO L87 Difference]: Start difference. First operand 55940 states and 62711 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:40,239 INFO L93 Difference]: Finished difference Result 121241 states and 135987 transitions. [2021-12-15 09:58:40,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:40,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 420 [2021-12-15 09:58:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:40,450 INFO L225 Difference]: With dead ends: 121241 [2021-12-15 09:58:40,450 INFO L226 Difference]: Without dead ends: 64878 [2021-12-15 09:58:40,499 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 [2021-12-15 09:58:40,507 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:40,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 774 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 09:58:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64878 states. [2021-12-15 09:58:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64878 to 53350. [2021-12-15 09:58:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53350 states, 53349 states have (on average 1.1076871169094078) internal successors, (59094), 53349 states have internal predecessors, (59094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53350 states to 53350 states and 59094 transitions. [2021-12-15 09:58:41,282 INFO L78 Accepts]: Start accepts. Automaton has 53350 states and 59094 transitions. Word has length 420 [2021-12-15 09:58:41,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:41,284 INFO L470 AbstractCegarLoop]: Abstraction has 53350 states and 59094 transitions. [2021-12-15 09:58:41,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:41,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53350 states and 59094 transitions. [2021-12-15 09:58:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-15 09:58:41,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:41,320 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:41,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:58:41,321 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1117070252, now seen corresponding path program 1 times [2021-12-15 09:58:41,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:41,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057433920] [2021-12-15 09:58:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:41,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-15 09:58:41,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:41,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057433920] [2021-12-15 09:58:41,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057433920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:41,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:41,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:41,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562438564] [2021-12-15 09:58:41,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:41,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:41,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:41,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:41,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:41,473 INFO L87 Difference]: Start difference. First operand 53350 states and 59094 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:43,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:43,589 INFO L93 Difference]: Finished difference Result 119901 states and 132834 transitions. [2021-12-15 09:58:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:43,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 421 [2021-12-15 09:58:43,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:43,677 INFO L225 Difference]: With dead ends: 119901 [2021-12-15 09:58:43,677 INFO L226 Difference]: Without dead ends: 63990 [2021-12-15 09:58:43,705 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 [2021-12-15 09:58:43,705 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 437 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:43,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 659 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 09:58:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63990 states. [2021-12-15 09:58:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63990 to 61851. [2021-12-15 09:58:44,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61851 states, 61850 states have (on average 1.0961196443007275) internal successors, (67795), 61850 states have internal predecessors, (67795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61851 states to 61851 states and 67795 transitions. [2021-12-15 09:58:44,537 INFO L78 Accepts]: Start accepts. Automaton has 61851 states and 67795 transitions. Word has length 421 [2021-12-15 09:58:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:44,538 INFO L470 AbstractCegarLoop]: Abstraction has 61851 states and 67795 transitions. [2021-12-15 09:58:44,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 61851 states and 67795 transitions. [2021-12-15 09:58:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-12-15 09:58:44,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:44,547 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:44,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:58:44,548 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 377993779, now seen corresponding path program 1 times [2021-12-15 09:58:44,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:44,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317270428] [2021-12-15 09:58:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:44,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 573 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-15 09:58:44,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:44,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317270428] [2021-12-15 09:58:44,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317270428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:44,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:44,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 09:58:44,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292997663] [2021-12-15 09:58:44,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:44,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:58:44,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:58:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:58:44,716 INFO L87 Difference]: Start difference. First operand 61851 states and 67795 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:47,443 INFO L93 Difference]: Finished difference Result 145471 states and 159571 transitions. [2021-12-15 09:58:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:58:47,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 425 [2021-12-15 09:58:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:47,528 INFO L225 Difference]: With dead ends: 145471 [2021-12-15 09:58:47,528 INFO L226 Difference]: Without dead ends: 83622 [2021-12-15 09:58:47,557 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 [2021-12-15 09:58:47,557 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 828 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:47,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 207 Invalid, 2780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:58:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83622 states. [2021-12-15 09:58:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83622 to 78925. [2021-12-15 09:58:48,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78925 states, 78924 states have (on average 1.097967665095535) internal successors, (86656), 78924 states have internal predecessors, (86656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78925 states to 78925 states and 86656 transitions. [2021-12-15 09:58:48,534 INFO L78 Accepts]: Start accepts. Automaton has 78925 states and 86656 transitions. Word has length 425 [2021-12-15 09:58:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:48,534 INFO L470 AbstractCegarLoop]: Abstraction has 78925 states and 86656 transitions. [2021-12-15 09:58:48,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 78925 states and 86656 transitions. [2021-12-15 09:58:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-12-15 09:58:48,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:48,541 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:48,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:58:48,541 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1733652073, now seen corresponding path program 1 times [2021-12-15 09:58:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87501427] [2021-12-15 09:58:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:48,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-15 09:58:48,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:48,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87501427] [2021-12-15 09:58:48,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87501427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:48,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:48,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929754347] [2021-12-15 09:58:48,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:48,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:48,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:48,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:48,647 INFO L87 Difference]: Start difference. First operand 78925 states and 86656 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:50,692 INFO L93 Difference]: Finished difference Result 167643 states and 184228 transitions. [2021-12-15 09:58:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 444 [2021-12-15 09:58:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:50,815 INFO L225 Difference]: With dead ends: 167643 [2021-12-15 09:58:50,816 INFO L226 Difference]: Without dead ends: 88720 [2021-12-15 09:58:50,867 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 [2021-12-15 09:58:50,869 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 387 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:50,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 328 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 09:58:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88720 states. [2021-12-15 09:58:51,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88720 to 88286. [2021-12-15 09:58:51,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88286 states, 88285 states have (on average 1.0953389590530667) internal successors, (96702), 88285 states have internal predecessors, (96702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88286 states to 88286 states and 96702 transitions. [2021-12-15 09:58:51,847 INFO L78 Accepts]: Start accepts. Automaton has 88286 states and 96702 transitions. Word has length 444 [2021-12-15 09:58:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:51,848 INFO L470 AbstractCegarLoop]: Abstraction has 88286 states and 96702 transitions. [2021-12-15 09:58:51,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 88286 states and 96702 transitions. [2021-12-15 09:58:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-15 09:58:51,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:51,856 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:51,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:58:51,856 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:51,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1451937129, now seen corresponding path program 1 times [2021-12-15 09:58:51,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:51,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154788965] [2021-12-15 09:58:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:51,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:51,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-15 09:58:52,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:52,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154788965] [2021-12-15 09:58:52,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154788965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:52,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:58:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:58:52,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411949563] [2021-12-15 09:58:52,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:52,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:52,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:52,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:58:52,010 INFO L87 Difference]: Start difference. First operand 88286 states and 96702 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:53,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:53,684 INFO L93 Difference]: Finished difference Result 190190 states and 208577 transitions. [2021-12-15 09:58:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:53,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2021-12-15 09:58:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:54,037 INFO L225 Difference]: With dead ends: 190190 [2021-12-15 09:58:54,038 INFO L226 Difference]: Without dead ends: 101906 [2021-12-15 09:58:54,100 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 [2021-12-15 09:58:54,114 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 475 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:54,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 264 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 09:58:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101906 states. [2021-12-15 09:58:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101906 to 101449. [2021-12-15 09:58:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101449 states, 101448 states have (on average 1.0927963094393187) internal successors, (110862), 101448 states have internal predecessors, (110862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101449 states to 101449 states and 110862 transitions. [2021-12-15 09:58:55,550 INFO L78 Accepts]: Start accepts. Automaton has 101449 states and 110862 transitions. Word has length 468 [2021-12-15 09:58:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:58:55,551 INFO L470 AbstractCegarLoop]: Abstraction has 101449 states and 110862 transitions. [2021-12-15 09:58:55,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 101449 states and 110862 transitions. [2021-12-15 09:58:55,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2021-12-15 09:58:55,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:58:55,560 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:58:55,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 09:58:55,560 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:58:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:58:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1632310757, now seen corresponding path program 1 times [2021-12-15 09:58:55,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:58:55,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340899583] [2021-12-15 09:58:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:55,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:58:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 17 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 09:58:55,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:58:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340899583] [2021-12-15 09:58:55,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340899583] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:58:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577097280] [2021-12-15 09:58:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:58:55,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:58:55,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:58:55,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:58:55,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:58:55,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:58:55,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:58:55,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:58:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-12-15 09:58:56,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:58:56,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577097280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:58:56,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:58:56,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 09:58:56,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810243484] [2021-12-15 09:58:56,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:58:56,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:58:56,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:58:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:58:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:56,483 INFO L87 Difference]: Start difference. First operand 101449 states and 110862 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:58:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:58:58,615 INFO L93 Difference]: Finished difference Result 208447 states and 227581 transitions. [2021-12-15 09:58:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:58:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 471 [2021-12-15 09:58:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:58:58,750 INFO L225 Difference]: With dead ends: 208447 [2021-12-15 09:58:58,751 INFO L226 Difference]: Without dead ends: 105293 [2021-12-15 09:58:58,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:58:58,814 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 424 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:58:58,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 807 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 09:58:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105293 states. [2021-12-15 09:59:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105293 to 102292. [2021-12-15 09:59:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102292 states, 102291 states have (on average 1.0912103704138194) internal successors, (111621), 102291 states have internal predecessors, (111621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102292 states to 102292 states and 111621 transitions. [2021-12-15 09:59:00,416 INFO L78 Accepts]: Start accepts. Automaton has 102292 states and 111621 transitions. Word has length 471 [2021-12-15 09:59:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:59:00,417 INFO L470 AbstractCegarLoop]: Abstraction has 102292 states and 111621 transitions. [2021-12-15 09:59:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:59:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 102292 states and 111621 transitions. [2021-12-15 09:59:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2021-12-15 09:59:00,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:59:00,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:59:00,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 09:59:00,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-15 09:59:00,642 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:59:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:59:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1828137218, now seen corresponding path program 1 times [2021-12-15 09:59:00,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:59:00,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085093818] [2021-12-15 09:59:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:00,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:59:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 559 proven. 29 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-12-15 09:59:01,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:59:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085093818] [2021-12-15 09:59:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085093818] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:59:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880042461] [2021-12-15 09:59:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:59:01,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:59:01,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:59:01,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:59:01,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:59:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:59:01,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 09:59:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates...