./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label18.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem16_label18.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 6ef9f02eeb8480c92d0c249f15386b1338daf60e359031b970c1be1640c041cb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:17:24,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:17:24,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:17:24,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:17:24,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:17:24,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:17:24,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:17:24,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:17:24,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:17:24,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:17:24,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:17:24,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:17:24,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:17:24,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:17:24,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:17:24,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:17:24,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:17:24,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:17:24,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:17:24,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:17:24,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:17:24,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:17:24,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:17:24,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:17:24,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:17:24,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:17:24,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:17:24,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:17:24,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:17:24,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:17:24,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:17:24,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:17:24,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:17:24,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:17:24,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:17:24,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:17:24,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:17:24,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:17:24,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:17:24,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:17:24,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:17:24,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:17:24,966 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:17:24,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:17:24,967 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:17:24,967 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:17:24,968 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:17:24,968 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:17:24,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:17:24,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:17:24,969 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:17:24,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:17:24,970 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:17:24,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:17:24,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:17:24,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:17:24,971 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:17:24,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:17:24,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:17:24,972 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:17:24,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:17:24,972 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:17:24,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:17:24,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:17:24,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:17:24,973 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:17:24,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:24,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:17:24,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:17:24,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:17:24,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:17:24,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:17:24,974 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:17:24,974 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:17:24,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:17:24,975 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:17:24,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef9f02eeb8480c92d0c249f15386b1338daf60e359031b970c1be1640c041cb [2021-12-21 11:17:25,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:17:25,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:17:25,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:17:25,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:17:25,231 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:17:25,232 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2021-12-21 11:17:25,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35eb5bec5/95c7714d04ca4ac282d8de44ba40499b/FLAGa093a7b41 [2021-12-21 11:17:25,825 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:17:25,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label18.c [2021-12-21 11:17:25,845 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35eb5bec5/95c7714d04ca4ac282d8de44ba40499b/FLAGa093a7b41 [2021-12-21 11:17:26,058 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35eb5bec5/95c7714d04ca4ac282d8de44ba40499b [2021-12-21 11:17:26,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:17:26,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:17:26,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:26,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:17:26,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:17:26,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:26,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141d9763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26, skipping insertion in model container [2021-12-21 11:17:26,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:26,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:17:26,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:17:26,307 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/Problem16_label18.c[1111,1124] [2021-12-21 11:17:26,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:26,689 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:17:26,702 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/Problem16_label18.c[1111,1124] [2021-12-21 11:17:26,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:26,858 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:17:26,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26 WrapperNode [2021-12-21 11:17:26,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:26,860 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:26,860 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:17:26,860 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:17:26,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:26,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,048 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-21 11:17:27,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:27,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:17:27,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:17:27,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:17:27,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:17:27,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:17:27,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:17:27,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:17:27,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (1/1) ... [2021-12-21 11:17:27,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:27,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:27,248 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) [2021-12-21 11:17:27,258 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 [2021-12-21 11:17:27,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:17:27,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:17:27,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:17:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:17:27,335 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:17:27,337 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:17:28,982 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:17:28,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:17:28,997 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:17:29,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:29 BoogieIcfgContainer [2021-12-21 11:17:29,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:17:29,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:17:29,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:17:29,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:17:29,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:17:26" (1/3) ... [2021-12-21 11:17:29,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fec4f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:29, skipping insertion in model container [2021-12-21 11:17:29,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:26" (2/3) ... [2021-12-21 11:17:29,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fec4f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:29, skipping insertion in model container [2021-12-21 11:17:29,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:29" (3/3) ... [2021-12-21 11:17:29,007 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label18.c [2021-12-21 11:17:29,011 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:17:29,012 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:17:29,056 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:17:29,062 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 [2021-12-21 11:17:29,062 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:17:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 11:17:29,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:29,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:29,090 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:29,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2021-12-21 11:17:29,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:29,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110388874] [2021-12-21 11:17:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:29,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:29,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110388874] [2021-12-21 11:17:29,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110388874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:29,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:29,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:29,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6528970] [2021-12-21 11:17:29,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:29,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:29,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:29,300 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:30,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:30,850 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-21 11:17:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:30,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-21 11:17:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:30,872 INFO L225 Difference]: With dead ends: 1122 [2021-12-21 11:17:30,873 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 11:17:30,880 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 [2021-12-21 11:17:30,884 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 380 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 254 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:17:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 11:17:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-21 11:17:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.518910741301059) internal successors, (1004), 661 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1004 transitions. [2021-12-21 11:17:30,966 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1004 transitions. Word has length 7 [2021-12-21 11:17:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:30,966 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1004 transitions. [2021-12-21 11:17:30,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1004 transitions. [2021-12-21 11:17:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 11:17:30,968 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:30,969 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 11:17:30,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:17:30,970 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash 315427350, now seen corresponding path program 1 times [2021-12-21 11:17:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:30,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767029082] [2021-12-21 11:17:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:30,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:31,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:31,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767029082] [2021-12-21 11:17:31,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767029082] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:31,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:31,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:31,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126983692] [2021-12-21 11:17:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:31,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:31,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:31,173 INFO L87 Difference]: Start difference. First operand 662 states and 1004 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:32,723 INFO L93 Difference]: Finished difference Result 1980 states and 3007 transitions. [2021-12-21 11:17:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-21 11:17:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:32,730 INFO L225 Difference]: With dead ends: 1980 [2021-12-21 11:17:32,730 INFO L226 Difference]: Without dead ends: 1320 [2021-12-21 11:17:32,731 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 [2021-12-21 11:17:32,732 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 268 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:32,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 217 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:17:32,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2021-12-21 11:17:32,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2021-12-21 11:17:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.4556482183472328) internal successors, (1920), 1319 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1920 transitions. [2021-12-21 11:17:32,773 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1920 transitions. Word has length 75 [2021-12-21 11:17:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:32,773 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1920 transitions. [2021-12-21 11:17:32,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:32,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1920 transitions. [2021-12-21 11:17:32,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-21 11:17:32,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:32,776 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:32,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:17:32,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash 631289711, now seen corresponding path program 1 times [2021-12-21 11:17:32,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:32,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259750141] [2021-12-21 11:17:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:32,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:32,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:32,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259750141] [2021-12-21 11:17:32,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259750141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:32,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:32,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:32,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101718009] [2021-12-21 11:17:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:32,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:32,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:32,857 INFO L87 Difference]: Start difference. First operand 1320 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:34,038 INFO L93 Difference]: Finished difference Result 3954 states and 5755 transitions. [2021-12-21 11:17:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-12-21 11:17:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:34,048 INFO L225 Difference]: With dead ends: 3954 [2021-12-21 11:17:34,049 INFO L226 Difference]: Without dead ends: 2636 [2021-12-21 11:17:34,051 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 [2021-12-21 11:17:34,052 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 369 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:34,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 155 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-21 11:17:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2021-12-21 11:17:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.3240986717267553) internal successors, (3489), 2635 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3489 transitions. [2021-12-21 11:17:34,114 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3489 transitions. Word has length 86 [2021-12-21 11:17:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:34,117 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3489 transitions. [2021-12-21 11:17:34,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3489 transitions. [2021-12-21 11:17:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-21 11:17:34,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:34,127 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:34,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:17:34,128 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 736201777, now seen corresponding path program 1 times [2021-12-21 11:17:34,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320700203] [2021-12-21 11:17:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:34,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 11:17:34,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:34,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320700203] [2021-12-21 11:17:34,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320700203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:34,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:34,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:34,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471847027] [2021-12-21 11:17:34,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:34,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:34,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:34,259 INFO L87 Difference]: Start difference. First operand 2636 states and 3489 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:35,352 INFO L93 Difference]: Finished difference Result 6586 states and 8545 transitions. [2021-12-21 11:17:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 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 204 [2021-12-21 11:17:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:35,367 INFO L225 Difference]: With dead ends: 6586 [2021-12-21 11:17:35,368 INFO L226 Difference]: Without dead ends: 3952 [2021-12-21 11:17:35,374 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 [2021-12-21 11:17:35,385 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 277 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:35,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 84 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:17:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-21 11:17:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-21 11:17:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.216400911161731) internal successors, (4806), 3951 states have internal predecessors, (4806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4806 transitions. [2021-12-21 11:17:35,481 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4806 transitions. Word has length 204 [2021-12-21 11:17:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:35,481 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4806 transitions. [2021-12-21 11:17:35,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4806 transitions. [2021-12-21 11:17:35,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-21 11:17:35,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:35,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:35,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:17:35,485 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash 328873390, now seen corresponding path program 1 times [2021-12-21 11:17:35,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:35,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432169594] [2021-12-21 11:17:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:35,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:35,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:35,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432169594] [2021-12-21 11:17:35,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432169594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:35,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:35,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:35,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110082270] [2021-12-21 11:17:35,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:35,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:17:35,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:17:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:17:35,727 INFO L87 Difference]: Start difference. First operand 3952 states and 4806 transitions. Second operand has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:37,085 INFO L93 Difference]: Finished difference Result 8269 states and 9989 transitions. [2021-12-21 11:17:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:17:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-12-21 11:17:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:37,098 INFO L225 Difference]: With dead ends: 8269 [2021-12-21 11:17:37,099 INFO L226 Difference]: Without dead ends: 4319 [2021-12-21 11:17:37,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:37,104 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 175 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:37,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 371 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 11:17:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-12-21 11:17:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 4281. [2021-12-21 11:17:37,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4281 states, 4280 states have (on average 1.2011682242990653) internal successors, (5141), 4280 states have internal predecessors, (5141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4281 states to 4281 states and 5141 transitions. [2021-12-21 11:17:37,178 INFO L78 Accepts]: Start accepts. Automaton has 4281 states and 5141 transitions. Word has length 252 [2021-12-21 11:17:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:37,179 INFO L470 AbstractCegarLoop]: Abstraction has 4281 states and 5141 transitions. [2021-12-21 11:17:37,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 4281 states and 5141 transitions. [2021-12-21 11:17:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-12-21 11:17:37,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:37,188 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:37,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:17:37,189 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:37,190 INFO L85 PathProgramCache]: Analyzing trace with hash -225792452, now seen corresponding path program 1 times [2021-12-21 11:17:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:37,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625677331] [2021-12-21 11:17:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:37,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:37,424 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:37,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625677331] [2021-12-21 11:17:37,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625677331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:37,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:37,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:17:37,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108165894] [2021-12-21 11:17:37,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:37,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 11:17:37,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:37,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 11:17:37,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:37,427 INFO L87 Difference]: Start difference. First operand 4281 states and 5141 transitions. Second operand has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:38,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:38,983 INFO L93 Difference]: Finished difference Result 8090 states and 9792 transitions. [2021-12-21 11:17:38,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:17:38,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 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 339 [2021-12-21 11:17:38,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:38,996 INFO L225 Difference]: With dead ends: 8090 [2021-12-21 11:17:38,997 INFO L226 Difference]: Without dead ends: 3952 [2021-12-21 11:17:39,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:39,003 INFO L933 BasicCegarLoop]: 263 mSDtfsCounter, 392 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:39,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 286 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 11:17:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-12-21 11:17:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2021-12-21 11:17:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.0802328524424196) internal successors, (4268), 3951 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4268 transitions. [2021-12-21 11:17:39,071 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4268 transitions. Word has length 339 [2021-12-21 11:17:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:39,071 INFO L470 AbstractCegarLoop]: Abstraction has 3952 states and 4268 transitions. [2021-12-21 11:17:39,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.42857142857143) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4268 transitions. [2021-12-21 11:17:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-21 11:17:39,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:39,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:39,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:17:39,077 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:39,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1791635028, now seen corresponding path program 1 times [2021-12-21 11:17:39,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:39,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045641766] [2021-12-21 11:17:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:39,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-12-21 11:17:39,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:39,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045641766] [2021-12-21 11:17:39,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045641766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:39,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:39,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:39,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896350379] [2021-12-21 11:17:39,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:39,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:39,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:39,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:39,222 INFO L87 Difference]: Start difference. First operand 3952 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:40,088 INFO L93 Difference]: Finished difference Result 9547 states and 10414 transitions. [2021-12-21 11:17:40,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:40,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 346 [2021-12-21 11:17:40,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:40,107 INFO L225 Difference]: With dead ends: 9547 [2021-12-21 11:17:40,107 INFO L226 Difference]: Without dead ends: 5926 [2021-12-21 11:17:40,112 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 [2021-12-21 11:17:40,112 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 342 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:40,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 40 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-12-21 11:17:40,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 5926. [2021-12-21 11:17:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0828691983122363) internal successors, (6416), 5925 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6416 transitions. [2021-12-21 11:17:40,194 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6416 transitions. Word has length 346 [2021-12-21 11:17:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:40,195 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6416 transitions. [2021-12-21 11:17:40,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6416 transitions. [2021-12-21 11:17:40,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-12-21 11:17:40,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:40,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:17:40,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:17:40,203 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:40,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:40,204 INFO L85 PathProgramCache]: Analyzing trace with hash -904340338, now seen corresponding path program 1 times [2021-12-21 11:17:40,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:40,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706324340] [2021-12-21 11:17:40,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:40,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-12-21 11:17:40,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:40,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706324340] [2021-12-21 11:17:40,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706324340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:40,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:40,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:40,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242445103] [2021-12-21 11:17:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:40,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:40,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:40,395 INFO L87 Difference]: Start difference. First operand 5926 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:41,329 INFO L93 Difference]: Finished difference Result 13495 states and 14710 transitions. [2021-12-21 11:17:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 463 [2021-12-21 11:17:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:41,357 INFO L225 Difference]: With dead ends: 13495 [2021-12-21 11:17:41,361 INFO L226 Difference]: Without dead ends: 7900 [2021-12-21 11:17:41,366 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 [2021-12-21 11:17:41,367 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 326 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:41,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 440 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:17:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7900 states. [2021-12-21 11:17:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7900 to 7571. [2021-12-21 11:17:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 1.070541611624835) internal successors, (8104), 7570 states have internal predecessors, (8104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 8104 transitions. [2021-12-21 11:17:41,489 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 8104 transitions. Word has length 463 [2021-12-21 11:17:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 7571 states and 8104 transitions. [2021-12-21 11:17:41,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 8104 transitions. [2021-12-21 11:17:41,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-12-21 11:17:41,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:41,500 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 11:17:41,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:17:41,502 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:41,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:41,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1872524626, now seen corresponding path program 1 times [2021-12-21 11:17:41,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:41,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771944179] [2021-12-21 11:17:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:41,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 9 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:41,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:41,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771944179] [2021-12-21 11:17:41,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771944179] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:41,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677549012] [2021-12-21 11:17:41,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:41,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:41,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:41,918 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) [2021-12-21 11:17:41,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:17:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:17:42,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-12-21 11:17:43,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:17:43,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677549012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:43,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:17:43,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2021-12-21 11:17:43,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202915690] [2021-12-21 11:17:43,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:43,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:43,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:17:43,175 INFO L87 Difference]: Start difference. First operand 7571 states and 8104 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:43,875 INFO L93 Difference]: Finished difference Result 9547 states and 10132 transitions. [2021-12-21 11:17:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 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 530 [2021-12-21 11:17:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:43,892 INFO L225 Difference]: With dead ends: 9547 [2021-12-21 11:17:43,893 INFO L226 Difference]: Without dead ends: 9545 [2021-12-21 11:17:43,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 11:17:43,897 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 63 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:43,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 83 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9545 states. [2021-12-21 11:17:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9545 to 7900. [2021-12-21 11:17:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7900 states, 7899 states have (on average 1.0692492720597544) internal successors, (8446), 7899 states have internal predecessors, (8446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8446 transitions. [2021-12-21 11:17:44,014 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8446 transitions. Word has length 530 [2021-12-21 11:17:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:44,015 INFO L470 AbstractCegarLoop]: Abstraction has 7900 states and 8446 transitions. [2021-12-21 11:17:44,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8446 transitions. [2021-12-21 11:17:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 877 [2021-12-21 11:17:44,029 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:44,030 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:44,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:17:44,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:44,244 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1240932553, now seen corresponding path program 1 times [2021-12-21 11:17:44,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:44,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443817748] [2021-12-21 11:17:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:44,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1480 backedges. 783 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-12-21 11:17:44,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:44,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443817748] [2021-12-21 11:17:44,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443817748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:44,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:44,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:44,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891116241] [2021-12-21 11:17:44,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:44,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:44,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:44,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:44,539 INFO L87 Difference]: Start difference. First operand 7900 states and 8446 transitions. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:45,306 INFO L93 Difference]: Finished difference Result 15798 states and 16896 transitions. [2021-12-21 11:17:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 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 876 [2021-12-21 11:17:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:45,318 INFO L225 Difference]: With dead ends: 15798 [2021-12-21 11:17:45,318 INFO L226 Difference]: Without dead ends: 8229 [2021-12-21 11:17:45,326 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 [2021-12-21 11:17:45,327 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 85 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:45,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 110 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2021-12-21 11:17:45,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2021-12-21 11:17:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8229 states, 8228 states have (on average 1.0673310646572678) internal successors, (8782), 8228 states have internal predecessors, (8782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8782 transitions. [2021-12-21 11:17:45,424 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8782 transitions. Word has length 876 [2021-12-21 11:17:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:45,425 INFO L470 AbstractCegarLoop]: Abstraction has 8229 states and 8782 transitions. [2021-12-21 11:17:45,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8782 transitions. [2021-12-21 11:17:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-12-21 11:17:45,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:45,440 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:45,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:17:45,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:45,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2073234269, now seen corresponding path program 1 times [2021-12-21 11:17:45,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449004210] [2021-12-21 11:17:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:45,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 823 proven. 0 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-12-21 11:17:45,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449004210] [2021-12-21 11:17:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449004210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:45,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:45,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:45,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714302342] [2021-12-21 11:17:45,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:45,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:45,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:45,728 INFO L87 Difference]: Start difference. First operand 8229 states and 8782 transitions. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:46,478 INFO L93 Difference]: Finished difference Result 20075 states and 21560 transitions. [2021-12-21 11:17:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 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 884 [2021-12-21 11:17:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:46,495 INFO L225 Difference]: With dead ends: 20075 [2021-12-21 11:17:46,496 INFO L226 Difference]: Without dead ends: 11190 [2021-12-21 11:17:46,504 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 [2021-12-21 11:17:46,505 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 272 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:46,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 428 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:46,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-21 11:17:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11190. [2021-12-21 11:17:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0541603360443292) internal successors, (11795), 11189 states have internal predecessors, (11795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11795 transitions. [2021-12-21 11:17:46,624 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11795 transitions. Word has length 884 [2021-12-21 11:17:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:46,625 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11795 transitions. [2021-12-21 11:17:46,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11795 transitions. [2021-12-21 11:17:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2021-12-21 11:17:46,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:46,642 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:46,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 11:17:46,643 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:46,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1713432572, now seen corresponding path program 1 times [2021-12-21 11:17:46,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:46,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289860463] [2021-12-21 11:17:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:46,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 437 proven. 663 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-21 11:17:47,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:47,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289860463] [2021-12-21 11:17:47,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289860463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086003351] [2021-12-21 11:17:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:47,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:47,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:47,088 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) [2021-12-21 11:17:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:17:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:47,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:17:47,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 683 proven. 0 refuted. 0 times theorem prover too weak. 665 trivial. 0 not checked. [2021-12-21 11:17:48,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:17:48,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086003351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:48,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:17:48,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:17:48,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999032062] [2021-12-21 11:17:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:48,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:48,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:48,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:48,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:48,654 INFO L87 Difference]: Start difference. First operand 11190 states and 11795 transitions. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:49,289 INFO L93 Difference]: Finished difference Result 21720 states and 22921 transitions. [2021-12-21 11:17:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 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 918 [2021-12-21 11:17:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:49,307 INFO L225 Difference]: With dead ends: 21720 [2021-12-21 11:17:49,308 INFO L226 Difference]: Without dead ends: 11190 [2021-12-21 11:17:49,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:49,317 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 118 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:49,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 377 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:17:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-21 11:17:49,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11190. [2021-12-21 11:17:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11190 states, 11189 states have (on average 1.0487979265349898) internal successors, (11735), 11189 states have internal predecessors, (11735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11190 states to 11190 states and 11735 transitions. [2021-12-21 11:17:49,434 INFO L78 Accepts]: Start accepts. Automaton has 11190 states and 11735 transitions. Word has length 918 [2021-12-21 11:17:49,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:49,434 INFO L470 AbstractCegarLoop]: Abstraction has 11190 states and 11735 transitions. [2021-12-21 11:17:49,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,435 INFO L276 IsEmpty]: Start isEmpty. Operand 11190 states and 11735 transitions. [2021-12-21 11:17:49,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1154 [2021-12-21 11:17:49,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:49,453 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:49,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 11:17:49,667 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 [2021-12-21 11:17:49,667 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1266427716, now seen corresponding path program 1 times [2021-12-21 11:17:49,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:49,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332773655] [2021-12-21 11:17:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:49,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2369 backedges. 1632 proven. 0 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-12-21 11:17:50,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:50,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332773655] [2021-12-21 11:17:50,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332773655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:50,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:50,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 11:17:50,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640672244] [2021-12-21 11:17:50,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:50,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 11:17:50,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 11:17:50,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:50,163 INFO L87 Difference]: Start difference. First operand 11190 states and 11735 transitions. Second operand has 6 states, 6 states have (on average 111.16666666666667) internal successors, (667), 6 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:51,285 INFO L93 Difference]: Finished difference Result 22472 states and 23580 transitions. [2021-12-21 11:17:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:17:51,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 111.16666666666667) internal successors, (667), 6 states have internal predecessors, (667), 0 states have call successors, (0), 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 1153 [2021-12-21 11:17:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:51,303 INFO L225 Difference]: With dead ends: 22472 [2021-12-21 11:17:51,304 INFO L226 Difference]: Without dead ends: 11942 [2021-12-21 11:17:51,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:51,314 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 515 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1630 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:51,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 574 Invalid, 1720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1630 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:17:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-12-21 11:17:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 11848. [2021-12-21 11:17:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.046509664894066) internal successors, (12398), 11847 states have internal predecessors, (12398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12398 transitions. [2021-12-21 11:17:51,479 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12398 transitions. Word has length 1153 [2021-12-21 11:17:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:51,480 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12398 transitions. [2021-12-21 11:17:51,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 111.16666666666667) internal successors, (667), 6 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12398 transitions. [2021-12-21 11:17:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1168 [2021-12-21 11:17:51,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:51,503 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:51,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:17:51,504 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:51,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:51,504 INFO L85 PathProgramCache]: Analyzing trace with hash 802844220, now seen corresponding path program 1 times [2021-12-21 11:17:51,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:51,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915797256] [2021-12-21 11:17:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:51,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2243 backedges. 1543 proven. 0 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2021-12-21 11:17:51,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:51,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915797256] [2021-12-21 11:17:51,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915797256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:51,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 11:17:51,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524980290] [2021-12-21 11:17:51,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:51,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 11:17:51,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 11:17:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:51,978 INFO L87 Difference]: Start difference. First operand 11848 states and 12398 transitions. Second operand has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:53,522 INFO L93 Difference]: Finished difference Result 23706 states and 24828 transitions. [2021-12-21 11:17:53,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 11:17:53,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 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 1167 [2021-12-21 11:17:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:53,540 INFO L225 Difference]: With dead ends: 23706 [2021-12-21 11:17:53,540 INFO L226 Difference]: Without dead ends: 12518 [2021-12-21 11:17:53,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:17:53,548 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 599 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 449 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:17:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12518 states. [2021-12-21 11:17:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12518 to 12177. [2021-12-21 11:17:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0464027595269383) internal successors, (12741), 12176 states have internal predecessors, (12741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12741 transitions. [2021-12-21 11:17:53,667 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12741 transitions. Word has length 1167 [2021-12-21 11:17:53,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:53,668 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12741 transitions. [2021-12-21 11:17:53,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:53,668 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12741 transitions. [2021-12-21 11:17:53,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1196 [2021-12-21 11:17:53,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:53,687 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:53,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:17:53,688 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1502939238, now seen corresponding path program 1 times [2021-12-21 11:17:53,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:53,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692544972] [2021-12-21 11:17:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:53,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2642 backedges. 829 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-21 11:17:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692544972] [2021-12-21 11:17:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692544972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:54,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282596448] [2021-12-21 11:17:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:54,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:54,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:54,109 INFO L87 Difference]: Start difference. First operand 12177 states and 12741 transitions. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:54,832 INFO L93 Difference]: Finished difference Result 26326 states and 27598 transitions. [2021-12-21 11:17:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 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 1195 [2021-12-21 11:17:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:54,850 INFO L225 Difference]: With dead ends: 26326 [2021-12-21 11:17:54,851 INFO L226 Difference]: Without dead ends: 13164 [2021-12-21 11:17:54,861 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 [2021-12-21 11:17:54,863 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 165 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:54,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 417 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13164 states. [2021-12-21 11:17:54,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13164 to 11848. [2021-12-21 11:17:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0388283953743565) internal successors, (12307), 11847 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12307 transitions. [2021-12-21 11:17:54,987 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12307 transitions. Word has length 1195 [2021-12-21 11:17:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:54,988 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12307 transitions. [2021-12-21 11:17:54,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12307 transitions. [2021-12-21 11:17:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1302 [2021-12-21 11:17:55,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:55,009 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:55,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 11:17:55,009 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:55,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 409461506, now seen corresponding path program 1 times [2021-12-21 11:17:55,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:55,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862457141] [2021-12-21 11:17:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:55,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 2348 proven. 0 refuted. 0 times theorem prover too weak. 1132 trivial. 0 not checked. [2021-12-21 11:17:55,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:55,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862457141] [2021-12-21 11:17:55,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862457141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:55,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:55,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:55,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640174547] [2021-12-21 11:17:55,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:55,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:55,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:55,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:55,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:55,395 INFO L87 Difference]: Start difference. First operand 11848 states and 12307 transitions. Second operand has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:56,057 INFO L93 Difference]: Finished difference Result 23036 states and 23945 transitions. [2021-12-21 11:17:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:56,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 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 1301 [2021-12-21 11:17:56,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:56,074 INFO L225 Difference]: With dead ends: 23036 [2021-12-21 11:17:56,074 INFO L226 Difference]: Without dead ends: 11848 [2021-12-21 11:17:56,082 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 [2021-12-21 11:17:56,083 INFO L933 BasicCegarLoop]: 413 mSDtfsCounter, 194 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:56,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 418 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:17:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-21 11:17:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11519. [2021-12-21 11:17:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0295190137176593) internal successors, (11858), 11518 states have internal predecessors, (11858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11858 transitions. [2021-12-21 11:17:56,205 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11858 transitions. Word has length 1301 [2021-12-21 11:17:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:56,205 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11858 transitions. [2021-12-21 11:17:56,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11858 transitions. [2021-12-21 11:17:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1327 [2021-12-21 11:17:56,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:56,258 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:56,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 11:17:56,258 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:56,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1547079852, now seen corresponding path program 1 times [2021-12-21 11:17:56,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:56,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381430581] [2021-12-21 11:17:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:56,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 2203 proven. 0 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2021-12-21 11:17:56,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:56,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381430581] [2021-12-21 11:17:56,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381430581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:56,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:56,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:56,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625860076] [2021-12-21 11:17:56,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:56,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:56,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:56,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:56,663 INFO L87 Difference]: Start difference. First operand 11519 states and 11858 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:57,400 INFO L93 Difference]: Finished difference Result 23036 states and 23716 transitions. [2021-12-21 11:17:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:57,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 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 1326 [2021-12-21 11:17:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:57,418 INFO L225 Difference]: With dead ends: 23036 [2021-12-21 11:17:57,419 INFO L226 Difference]: Without dead ends: 12177 [2021-12-21 11:17:57,425 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 [2021-12-21 11:17:57,426 INFO L933 BasicCegarLoop]: 425 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:57,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 431 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-21 11:17:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12177. [2021-12-21 11:17:57,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0283344283837057) internal successors, (12521), 12176 states have internal predecessors, (12521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12521 transitions. [2021-12-21 11:17:57,603 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12521 transitions. Word has length 1326 [2021-12-21 11:17:57,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:57,604 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12521 transitions. [2021-12-21 11:17:57,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12521 transitions. [2021-12-21 11:17:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1381 [2021-12-21 11:17:57,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:57,630 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:57,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 11:17:57,630 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:57,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1205008101, now seen corresponding path program 1 times [2021-12-21 11:17:57,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:57,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529341971] [2021-12-21 11:17:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:57,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 2280 proven. 66 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2021-12-21 11:17:58,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:58,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529341971] [2021-12-21 11:17:58,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529341971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:58,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689078130] [2021-12-21 11:17:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:58,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:58,123 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) [2021-12-21 11:17:58,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:17:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:17:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 1769 proven. 201 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2021-12-21 11:18:03,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:18:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 1769 proven. 201 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2021-12-21 11:18:09,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689078130] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:18:09,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:18:09,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-21 11:18:09,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869327490] [2021-12-21 11:18:09,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:18:09,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 11:18:09,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 11:18:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 11:18:09,376 INFO L87 Difference]: Start difference. First operand 12177 states and 12521 transitions. Second operand has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:13,574 INFO L93 Difference]: Finished difference Result 33564 states and 34567 transitions. [2021-12-21 11:18:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 11:18:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 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 1380 [2021-12-21 11:18:13,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:13,592 INFO L225 Difference]: With dead ends: 33564 [2021-12-21 11:18:13,592 INFO L226 Difference]: Without dead ends: 22047 [2021-12-21 11:18:13,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2770 GetRequests, 2755 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-12-21 11:18:13,601 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 2417 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 6114 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2417 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 6523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 6114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:13,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2417 Valid, 79 Invalid, 6523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 6114 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-21 11:18:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22047 states. [2021-12-21 11:18:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22047 to 17770. [2021-12-21 11:18:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17770 states, 17769 states have (on average 1.0258877820924082) internal successors, (18229), 17769 states have internal predecessors, (18229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17770 states to 17770 states and 18229 transitions. [2021-12-21 11:18:13,808 INFO L78 Accepts]: Start accepts. Automaton has 17770 states and 18229 transitions. Word has length 1380 [2021-12-21 11:18:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:13,809 INFO L470 AbstractCegarLoop]: Abstraction has 17770 states and 18229 transitions. [2021-12-21 11:18:13,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 189.55555555555554) internal successors, (1706), 8 states have internal predecessors, (1706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 17770 states and 18229 transitions. [2021-12-21 11:18:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2021-12-21 11:18:13,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:13,834 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 11:18:13,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:18:14,047 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 [2021-12-21 11:18:14,048 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:14,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1843215847, now seen corresponding path program 1 times [2021-12-21 11:18:14,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:14,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376392723] [2021-12-21 11:18:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:14,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:14,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 1871 proven. 156 refuted. 0 times theorem prover too weak. 2281 trivial. 0 not checked. [2021-12-21 11:18:14,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376392723] [2021-12-21 11:18:14,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376392723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:14,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447209810] [2021-12-21 11:18:14,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:14,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:14,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:14,549 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) [2021-12-21 11:18:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:18:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:14,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:18:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates...