./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.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 565fd413301c45f63fa2cdba47d97202665de3c20676178781aed7350181380f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:53:15,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:53:15,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:53:15,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:53:15,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:53:15,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:53:15,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:53:15,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:53:15,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:53:15,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:53:15,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:53:15,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:53:15,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:53:15,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:53:15,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:53:15,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:53:15,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:53:15,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:53:15,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:53:15,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:53:15,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:53:15,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:53:15,933 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:53:15,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:53:15,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:53:15,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:53:15,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:53:15,941 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:53:15,941 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:53:15,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:53:15,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:53:15,942 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:53:15,943 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:53:15,944 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:53:15,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:53:15,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:53:15,946 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:53:15,946 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:53:15,946 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:53:15,947 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:53:15,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:53:15,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:53:15,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:53:15,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:53:15,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:53:15,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:53:15,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:53:15,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:53:15,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:53:15,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:53:15,979 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:53:15,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:53:15,980 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:53:15,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:53:15,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:53:15,981 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:53:15,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:53:15,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:53:15,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:53:15,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:53:15,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:53:15,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:53:15,983 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:53:15,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:53:15,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 565fd413301c45f63fa2cdba47d97202665de3c20676178781aed7350181380f [2021-12-28 01:53:16,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:53:16,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:53:16,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:53:16,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:53:16,306 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:53:16,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c [2021-12-28 01:53:16,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52b11466/5fc549f04a1448bc999042d49bfe1fd8/FLAGf6117760d [2021-12-28 01:53:17,151 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:53:17,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c [2021-12-28 01:53:17,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52b11466/5fc549f04a1448bc999042d49bfe1fd8/FLAGf6117760d [2021-12-28 01:53:17,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c52b11466/5fc549f04a1448bc999042d49bfe1fd8 [2021-12-28 01:53:17,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:53:17,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:53:17,393 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:53:17,393 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:53:17,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:53:17,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:53:17" (1/1) ... [2021-12-28 01:53:17,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2416713e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:17, skipping insertion in model container [2021-12-28 01:53:17,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:53:17" (1/1) ... [2021-12-28 01:53:17,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:53:17,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:53:18,670 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c[381679,381692] [2021-12-28 01:53:18,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c[383339,383352] [2021-12-28 01:53:18,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:53:18,765 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:53:19,313 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c[381679,381692] [2021-12-28 01:53:19,316 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-1.c[383339,383352] [2021-12-28 01:53:19,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:53:19,370 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:53:19,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19 WrapperNode [2021-12-28 01:53:19,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:53:19,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:53:19,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:53:19,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:53:19,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,714 INFO L137 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12561 [2021-12-28 01:53:19,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:53:19,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:53:19,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:53:19,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:53:19,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:19,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:20,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:20,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:53:20,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:53:20,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:53:20,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:53:20,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (1/1) ... [2021-12-28 01:53:20,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:53:20,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:20,110 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) [2021-12-28 01:53:20,125 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 [2021-12-28 01:53:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:53:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-28 01:53:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-28 01:53:20,134 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-28 01:53:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-28 01:53:20,134 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 01:53:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 01:53:20,134 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-28 01:53:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-28 01:53:20,134 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-28 01:53:20,134 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-28 01:53:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:53:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-28 01:53:20,135 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-28 01:53:20,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:53:20,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:53:20,196 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:53:20,198 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:53:25,653 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:53:25,673 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:53:25,673 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-28 01:53:25,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:53:25 BoogieIcfgContainer [2021-12-28 01:53:25,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:53:25,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:53:25,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:53:25,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:53:25,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:53:17" (1/3) ... [2021-12-28 01:53:25,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4055fa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:53:25, skipping insertion in model container [2021-12-28 01:53:25,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:53:19" (2/3) ... [2021-12-28 01:53:25,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4055fa88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:53:25, skipping insertion in model container [2021-12-28 01:53:25,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:53:25" (3/3) ... [2021-12-28 01:53:25,682 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.01.cil-1.c [2021-12-28 01:53:25,686 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:53:25,686 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 01:53:25,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:53:25,727 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 [2021-12-28 01:53:25,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 01:53:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-28 01:53:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:53:25,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:25,771 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:25,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash -36301034, now seen corresponding path program 1 times [2021-12-28 01:53:25,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:25,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346392399] [2021-12-28 01:53:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:25,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:25,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:25,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346392399] [2021-12-28 01:53:25,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346392399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:25,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:25,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:53:25,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439977183] [2021-12-28 01:53:25,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:25,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:53:25,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:53:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:53:25,977 INFO L87 Difference]: Start difference. First operand has 2290 states, 2266 states have (on average 1.8587819947043247) internal successors, (4212), 2269 states have internal predecessors, (4212), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:26,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:26,445 INFO L93 Difference]: Finished difference Result 4705 states and 8678 transitions. [2021-12-28 01:53:26,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:53:26,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:53:26,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:26,465 INFO L225 Difference]: With dead ends: 4705 [2021-12-28 01:53:26,465 INFO L226 Difference]: Without dead ends: 2354 [2021-12-28 01:53:26,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:53:26,474 INFO L933 BasicCegarLoop]: 4187 mSDtfsCounter, 4313 mSDsluCounter, 12342 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 16529 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:26,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 16529 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:53:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-12-28 01:53:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2313. [2021-12-28 01:53:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2273 states have (on average 1.8376594808622966) internal successors, (4177), 2276 states have internal predecessors, (4177), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2021-12-28 01:53:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 4230 transitions. [2021-12-28 01:53:26,562 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 4230 transitions. Word has length 57 [2021-12-28 01:53:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:26,563 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 4230 transitions. [2021-12-28 01:53:26,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 4230 transitions. [2021-12-28 01:53:26,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:53:26,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:26,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:26,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:53:26,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -948253030, now seen corresponding path program 1 times [2021-12-28 01:53:26,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:26,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791015269] [2021-12-28 01:53:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:26,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:26,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:26,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:26,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791015269] [2021-12-28 01:53:26,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791015269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:26,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:26,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:26,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848066840] [2021-12-28 01:53:26,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:26,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:26,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:26,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:26,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:26,668 INFO L87 Difference]: Start difference. First operand 2313 states and 4230 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:27,223 INFO L93 Difference]: Finished difference Result 2645 states and 4704 transitions. [2021-12-28 01:53:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 01:53:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:53:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:27,232 INFO L225 Difference]: With dead ends: 2645 [2021-12-28 01:53:27,232 INFO L226 Difference]: Without dead ends: 2462 [2021-12-28 01:53:27,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 01:53:27,235 INFO L933 BasicCegarLoop]: 4176 mSDtfsCounter, 4231 mSDsluCounter, 16299 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 20475 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:27,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4239 Valid, 20475 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:53:27,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-12-28 01:53:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2398. [2021-12-28 01:53:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2341 states have (on average 1.8248611704399829) internal successors, (4272), 2345 states have internal predecessors, (4272), 35 states have call successors, (35), 18 states have call predecessors, (35), 20 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2021-12-28 01:53:27,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 4347 transitions. [2021-12-28 01:53:27,281 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 4347 transitions. Word has length 57 [2021-12-28 01:53:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:27,281 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 4347 transitions. [2021-12-28 01:53:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 4347 transitions. [2021-12-28 01:53:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:53:27,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:27,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:27,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:53:27,283 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:27,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:27,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1297326424, now seen corresponding path program 1 times [2021-12-28 01:53:27,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:27,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880591100] [2021-12-28 01:53:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:27,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:27,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:27,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880591100] [2021-12-28 01:53:27,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880591100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:27,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:27,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:27,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776566626] [2021-12-28 01:53:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:27,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:27,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:27,351 INFO L87 Difference]: Start difference. First operand 2398 states and 4347 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:27,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:27,997 INFO L93 Difference]: Finished difference Result 2981 states and 5171 transitions. [2021-12-28 01:53:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:53:27,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:53:27,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:28,005 INFO L225 Difference]: With dead ends: 2981 [2021-12-28 01:53:28,006 INFO L226 Difference]: Without dead ends: 2713 [2021-12-28 01:53:28,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:53:28,007 INFO L933 BasicCegarLoop]: 4166 mSDtfsCounter, 4285 mSDsluCounter, 16291 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4295 SdHoareTripleChecker+Valid, 20457 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:28,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4295 Valid, 20457 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:53:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-28 01:53:28,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2563. [2021-12-28 01:53:28,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2474 states have (on average 1.8023443815683104) internal successors, (4459), 2480 states have internal predecessors, (4459), 53 states have call successors, (53), 30 states have call predecessors, (53), 34 states have return successors, (66), 56 states have call predecessors, (66), 53 states have call successors, (66) [2021-12-28 01:53:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 4578 transitions. [2021-12-28 01:53:28,056 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 4578 transitions. Word has length 57 [2021-12-28 01:53:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:28,056 INFO L470 AbstractCegarLoop]: Abstraction has 2563 states and 4578 transitions. [2021-12-28 01:53:28,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 4578 transitions. [2021-12-28 01:53:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:53:28,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:28,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:28,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:53:28,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:28,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:28,059 INFO L85 PathProgramCache]: Analyzing trace with hash 399933146, now seen corresponding path program 1 times [2021-12-28 01:53:28,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:28,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830289319] [2021-12-28 01:53:28,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:28,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:28,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830289319] [2021-12-28 01:53:28,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830289319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:28,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:28,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 01:53:28,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487235291] [2021-12-28 01:53:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:28,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 01:53:28,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:28,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 01:53:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:28,118 INFO L87 Difference]: Start difference. First operand 2563 states and 4578 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:28,671 INFO L93 Difference]: Finished difference Result 3503 states and 5902 transitions. [2021-12-28 01:53:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:53:28,672 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:53:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:28,684 INFO L225 Difference]: With dead ends: 3503 [2021-12-28 01:53:28,684 INFO L226 Difference]: Without dead ends: 3070 [2021-12-28 01:53:28,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:53:28,695 INFO L933 BasicCegarLoop]: 4167 mSDtfsCounter, 4228 mSDsluCounter, 16273 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 20440 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:28,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4235 Valid, 20440 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 01:53:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-12-28 01:53:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 2862. [2021-12-28 01:53:28,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2715 states have (on average 1.7661141804788214) internal successors, (4795), 2725 states have internal predecessors, (4795), 85 states have call successors, (85), 52 states have call predecessors, (85), 60 states have return successors, (120), 92 states have call predecessors, (120), 85 states have call successors, (120) [2021-12-28 01:53:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 5000 transitions. [2021-12-28 01:53:28,799 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 5000 transitions. Word has length 57 [2021-12-28 01:53:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:28,799 INFO L470 AbstractCegarLoop]: Abstraction has 2862 states and 5000 transitions. [2021-12-28 01:53:28,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 5000 transitions. [2021-12-28 01:53:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 01:53:28,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:28,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:28,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:53:28,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:28,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 648079640, now seen corresponding path program 1 times [2021-12-28 01:53:28,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:28,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103729046] [2021-12-28 01:53:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:28,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:28,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:28,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:28,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103729046] [2021-12-28 01:53:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103729046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:28,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:28,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:53:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081117832] [2021-12-28 01:53:28,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:28,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:53:28,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:28,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:53:28,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:53:28,901 INFO L87 Difference]: Start difference. First operand 2862 states and 5000 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:29,350 INFO L93 Difference]: Finished difference Result 4199 states and 6894 transitions. [2021-12-28 01:53:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 01:53:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 57 [2021-12-28 01:53:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:29,364 INFO L225 Difference]: With dead ends: 4199 [2021-12-28 01:53:29,364 INFO L226 Difference]: Without dead ends: 3468 [2021-12-28 01:53:29,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:53:29,369 INFO L933 BasicCegarLoop]: 4213 mSDtfsCounter, 4340 mSDsluCounter, 12156 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4363 SdHoareTripleChecker+Valid, 16369 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:29,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4363 Valid, 16369 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:53:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-28 01:53:29,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3263. [2021-12-28 01:53:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3033 states have (on average 1.7213979558193209) internal successors, (5221), 3052 states have internal predecessors, (5221), 134 states have call successors, (134), 82 states have call predecessors, (134), 94 states have return successors, (179), 136 states have call predecessors, (179), 134 states have call successors, (179) [2021-12-28 01:53:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 5534 transitions. [2021-12-28 01:53:29,457 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 5534 transitions. Word has length 57 [2021-12-28 01:53:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:29,458 INFO L470 AbstractCegarLoop]: Abstraction has 3263 states and 5534 transitions. [2021-12-28 01:53:29,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 01:53:29,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 5534 transitions. [2021-12-28 01:53:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:53:29,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:29,461 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:29,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:53:29,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash 12281189, now seen corresponding path program 1 times [2021-12-28 01:53:29,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:29,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903299564] [2021-12-28 01:53:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:29,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 01:53:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 01:53:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 01:53:29,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:29,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903299564] [2021-12-28 01:53:29,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903299564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:29,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705667753] [2021-12-28 01:53:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:29,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:29,568 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) [2021-12-28 01:53:29,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:53:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:53:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:53:29,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:29,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705667753] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:29,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:29,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:53:29,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100972784] [2021-12-28 01:53:29,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:29,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:29,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:29,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:29,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:29,760 INFO L87 Difference]: Start difference. First operand 3263 states and 5534 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:29,844 INFO L93 Difference]: Finished difference Result 5442 states and 8608 transitions. [2021-12-28 01:53:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-28 01:53:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:29,858 INFO L225 Difference]: With dead ends: 5442 [2021-12-28 01:53:29,859 INFO L226 Difference]: Without dead ends: 4311 [2021-12-28 01:53:29,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:29,863 INFO L933 BasicCegarLoop]: 4217 mSDtfsCounter, 114 mSDsluCounter, 4096 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 8313 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:29,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 8313 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-12-28 01:53:29,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 4311. [2021-12-28 01:53:29,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4311 states, 3872 states have (on average 1.6417871900826446) internal successors, (6357), 3904 states have internal predecessors, (6357), 253 states have call successors, (253), 160 states have call predecessors, (253), 184 states have return successors, (376), 262 states have call predecessors, (376), 253 states have call successors, (376) [2021-12-28 01:53:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4311 states to 4311 states and 6986 transitions. [2021-12-28 01:53:30,003 INFO L78 Accepts]: Start accepts. Automaton has 4311 states and 6986 transitions. Word has length 92 [2021-12-28 01:53:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:30,004 INFO L470 AbstractCegarLoop]: Abstraction has 4311 states and 6986 transitions. [2021-12-28 01:53:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4311 states and 6986 transitions. [2021-12-28 01:53:30,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-28 01:53:30,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:30,010 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:30,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:30,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-28 01:53:30,228 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:30,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:30,228 INFO L85 PathProgramCache]: Analyzing trace with hash -788169551, now seen corresponding path program 1 times [2021-12-28 01:53:30,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:30,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866238597] [2021-12-28 01:53:30,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:30,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:30,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 01:53:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-28 01:53:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-28 01:53:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 01:53:30,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866238597] [2021-12-28 01:53:30,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866238597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:30,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829555629] [2021-12-28 01:53:30,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:30,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:30,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:30,376 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) [2021-12-28 01:53:30,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:53:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:53:30,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:53:30,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:30,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829555629] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:30,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:30,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-28 01:53:30,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003165102] [2021-12-28 01:53:30,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:30,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:30,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:30,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:30,641 INFO L87 Difference]: Start difference. First operand 4311 states and 6986 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 01:53:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:30,775 INFO L93 Difference]: Finished difference Result 8527 states and 12855 transitions. [2021-12-28 01:53:30,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:30,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 118 [2021-12-28 01:53:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:30,797 INFO L225 Difference]: With dead ends: 8527 [2021-12-28 01:53:30,798 INFO L226 Difference]: Without dead ends: 6351 [2021-12-28 01:53:30,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:30,806 INFO L933 BasicCegarLoop]: 4117 mSDtfsCounter, 4026 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4026 SdHoareTripleChecker+Valid, 4237 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:30,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4026 Valid, 4237 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-12-28 01:53:30,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 6293. [2021-12-28 01:53:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6293 states, 5460 states have (on average 1.5576923076923077) internal successors, (8505), 5521 states have internal predecessors, (8505), 473 states have call successors, (473), 310 states have call predecessors, (473), 358 states have return successors, (688), 477 states have call predecessors, (688), 473 states have call successors, (688) [2021-12-28 01:53:30,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6293 states to 6293 states and 9666 transitions. [2021-12-28 01:53:30,989 INFO L78 Accepts]: Start accepts. Automaton has 6293 states and 9666 transitions. Word has length 118 [2021-12-28 01:53:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:30,989 INFO L470 AbstractCegarLoop]: Abstraction has 6293 states and 9666 transitions. [2021-12-28 01:53:30,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-28 01:53:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6293 states and 9666 transitions. [2021-12-28 01:53:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:53:30,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:30,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:31,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:31,215 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,SelfDestructingSolverStorable6 [2021-12-28 01:53:31,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:31,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1080279049, now seen corresponding path program 1 times [2021-12-28 01:53:31,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:31,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292680430] [2021-12-28 01:53:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:31,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 01:53:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-28 01:53:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-12-28 01:53:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-28 01:53:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-28 01:53:31,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:31,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292680430] [2021-12-28 01:53:31,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292680430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:31,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638610670] [2021-12-28 01:53:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:31,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:31,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:31,296 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) [2021-12-28 01:53:31,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:53:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:53:31,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-28 01:53:31,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:31,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638610670] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:31,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:31,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:53:31,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927948282] [2021-12-28 01:53:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:31,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:31,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:31,558 INFO L87 Difference]: Start difference. First operand 6293 states and 9666 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:53:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:31,783 INFO L93 Difference]: Finished difference Result 9515 states and 14095 transitions. [2021-12-28 01:53:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 134 [2021-12-28 01:53:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:31,802 INFO L225 Difference]: With dead ends: 9515 [2021-12-28 01:53:31,802 INFO L226 Difference]: Without dead ends: 6621 [2021-12-28 01:53:31,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:31,808 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4059 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4059 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:31,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4059 Valid, 4248 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6621 states. [2021-12-28 01:53:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6621 to 6583. [2021-12-28 01:53:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6583 states, 5718 states have (on average 1.5318293109478838) internal successors, (8759), 5779 states have internal predecessors, (8759), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-28 01:53:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6583 states to 6583 states and 9958 transitions. [2021-12-28 01:53:31,963 INFO L78 Accepts]: Start accepts. Automaton has 6583 states and 9958 transitions. Word has length 134 [2021-12-28 01:53:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 6583 states and 9958 transitions. [2021-12-28 01:53:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 01:53:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6583 states and 9958 transitions. [2021-12-28 01:53:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 01:53:31,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:31,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:31,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:32,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:32,190 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash 703612430, now seen corresponding path program 1 times [2021-12-28 01:53:32,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:32,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335236468] [2021-12-28 01:53:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:32,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:32,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:32,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 01:53:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:53:32,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:32,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335236468] [2021-12-28 01:53:32,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335236468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:32,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578875686] [2021-12-28 01:53:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:32,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:32,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:32,269 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) [2021-12-28 01:53:32,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:53:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 01:53:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-28 01:53:32,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:32,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578875686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:32,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:32,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:53:32,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780004826] [2021-12-28 01:53:32,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:32,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:32,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:32,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:32,561 INFO L87 Difference]: Start difference. First operand 6583 states and 9958 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 01:53:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:32,667 INFO L93 Difference]: Finished difference Result 8950 states and 13283 transitions. [2021-12-28 01:53:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 135 [2021-12-28 01:53:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:32,683 INFO L225 Difference]: With dead ends: 8950 [2021-12-28 01:53:32,684 INFO L226 Difference]: Without dead ends: 6617 [2021-12-28 01:53:32,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:32,692 INFO L933 BasicCegarLoop]: 4205 mSDtfsCounter, 99 mSDsluCounter, 4087 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 8292 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:32,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 8292 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:32,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-12-28 01:53:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 6559. [2021-12-28 01:53:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 5694 states have (on average 1.5175623463294696) internal successors, (8641), 5755 states have internal predecessors, (8641), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2021-12-28 01:53:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 9840 transitions. [2021-12-28 01:53:32,840 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 9840 transitions. Word has length 135 [2021-12-28 01:53:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:32,840 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 9840 transitions. [2021-12-28 01:53:32,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 01:53:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 9840 transitions. [2021-12-28 01:53:32,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 01:53:32,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:32,848 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:32,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:33,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:33,062 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:33,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1285829934, now seen corresponding path program 1 times [2021-12-28 01:53:33,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:33,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377156043] [2021-12-28 01:53:33,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:33,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-28 01:53:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:53:33,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377156043] [2021-12-28 01:53:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377156043] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175845956] [2021-12-28 01:53:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:33,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:33,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:53:33,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 01:53:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 01:53:33,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 01:53:33,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:33,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175845956] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:33,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:33,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-28 01:53:33,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547413189] [2021-12-28 01:53:33,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:33,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:33,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:33,421 INFO L87 Difference]: Start difference. First operand 6559 states and 9840 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 01:53:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:33,525 INFO L93 Difference]: Finished difference Result 9831 states and 14294 transitions. [2021-12-28 01:53:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:33,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2021-12-28 01:53:33,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:33,538 INFO L225 Difference]: With dead ends: 9831 [2021-12-28 01:53:33,539 INFO L226 Difference]: Without dead ends: 5941 [2021-12-28 01:53:33,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:53:33,547 INFO L933 BasicCegarLoop]: 4100 mSDtfsCounter, 4077 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4077 SdHoareTripleChecker+Valid, 4124 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:33,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4077 Valid, 4124 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-12-28 01:53:33,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5711. [2021-12-28 01:53:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5711 states, 5012 states have (on average 1.5157621707901037) internal successors, (7597), 5057 states have internal predecessors, (7597), 391 states have call successors, (391), 274 states have call predecessors, (391), 306 states have return successors, (510), 387 states have call predecessors, (510), 391 states have call successors, (510) [2021-12-28 01:53:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5711 states to 5711 states and 8498 transitions. [2021-12-28 01:53:33,669 INFO L78 Accepts]: Start accepts. Automaton has 5711 states and 8498 transitions. Word has length 135 [2021-12-28 01:53:33,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 5711 states and 8498 transitions. [2021-12-28 01:53:33,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-28 01:53:33,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5711 states and 8498 transitions. [2021-12-28 01:53:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:53:33,675 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:33,675 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:33,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:33,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 01:53:33,899 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash -371269117, now seen corresponding path program 1 times [2021-12-28 01:53:33,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073228773] [2021-12-28 01:53:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:33,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:33,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:34,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:34,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:34,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:53:34,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:34,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073228773] [2021-12-28 01:53:34,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073228773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:34,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223738893] [2021-12-28 01:53:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:34,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:34,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:34,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:53:34,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 01:53:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:34,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:53:34,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:53:34,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:34,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223738893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:34,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:34,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 01:53:34,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031573298] [2021-12-28 01:53:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:34,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:53:34,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:53:34,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:53:34,392 INFO L87 Difference]: Start difference. First operand 5711 states and 8498 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:34,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:34,577 INFO L93 Difference]: Finished difference Result 7117 states and 10335 transitions. [2021-12-28 01:53:34,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:53:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:53:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:34,588 INFO L225 Difference]: With dead ends: 7117 [2021-12-28 01:53:34,588 INFO L226 Difference]: Without dead ends: 4791 [2021-12-28 01:53:34,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:53:34,593 INFO L933 BasicCegarLoop]: 4078 mSDtfsCounter, 4094 mSDsluCounter, 8053 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 12131 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:34,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 12131 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:53:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-12-28 01:53:34,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 4779. [2021-12-28 01:53:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4779 states, 4262 states have (on average 1.544580009385265) internal successors, (6583), 4289 states have internal predecessors, (6583), 295 states have call successors, (295), 204 states have call predecessors, (295), 220 states have return successors, (354), 289 states have call predecessors, (354), 295 states have call successors, (354) [2021-12-28 01:53:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4779 states to 4779 states and 7232 transitions. [2021-12-28 01:53:34,794 INFO L78 Accepts]: Start accepts. Automaton has 4779 states and 7232 transitions. Word has length 136 [2021-12-28 01:53:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:34,794 INFO L470 AbstractCegarLoop]: Abstraction has 4779 states and 7232 transitions. [2021-12-28 01:53:34,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:34,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4779 states and 7232 transitions. [2021-12-28 01:53:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:53:34,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:34,797 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:34,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:35,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:35,014 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1678411515, now seen corresponding path program 1 times [2021-12-28 01:53:35,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810283996] [2021-12-28 01:53:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:35,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:35,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:53:35,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810283996] [2021-12-28 01:53:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810283996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:35,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608269000] [2021-12-28 01:53:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:35,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:35,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:35,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:53:35,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 01:53:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:53:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-28 01:53:35,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608269000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:35,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:35,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-28 01:53:35,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677463376] [2021-12-28 01:53:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:35,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:53:35,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:53:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:53:35,395 INFO L87 Difference]: Start difference. First operand 4779 states and 7232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:35,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:35,616 INFO L93 Difference]: Finished difference Result 7083 states and 10147 transitions. [2021-12-28 01:53:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:53:35,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:53:35,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:35,626 INFO L225 Difference]: With dead ends: 7083 [2021-12-28 01:53:35,626 INFO L226 Difference]: Without dead ends: 4732 [2021-12-28 01:53:35,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:53:35,631 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 4115 mSDsluCounter, 8048 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4123 SdHoareTripleChecker+Valid, 12138 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:35,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4123 Valid, 12138 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:53:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-12-28 01:53:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 3773. [2021-12-28 01:53:35,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3773 states, 3468 states have (on average 1.6000576701268743) internal successors, (5549), 3483 states have internal predecessors, (5549), 173 states have call successors, (173), 122 states have call predecessors, (173), 130 states have return successors, (203), 169 states have call predecessors, (203), 173 states have call successors, (203) [2021-12-28 01:53:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3773 states to 3773 states and 5925 transitions. [2021-12-28 01:53:35,724 INFO L78 Accepts]: Start accepts. Automaton has 3773 states and 5925 transitions. Word has length 136 [2021-12-28 01:53:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:35,724 INFO L470 AbstractCegarLoop]: Abstraction has 3773 states and 5925 transitions. [2021-12-28 01:53:35,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3773 states and 5925 transitions. [2021-12-28 01:53:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:53:35,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:35,727 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:35,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 01:53:35,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:35,965 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:35,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 219085251, now seen corresponding path program 1 times [2021-12-28 01:53:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:35,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806198258] [2021-12-28 01:53:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:35,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:35,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-28 01:53:36,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806198258] [2021-12-28 01:53:36,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806198258] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:36,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374743996] [2021-12-28 01:53:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:36,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:36,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:36,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:53:36,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 01:53:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 01:53:36,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-28 01:53:36,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:36,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374743996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:36,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:36,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-28 01:53:36,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292080104] [2021-12-28 01:53:36,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:36,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:53:36,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:36,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:53:36,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:36,306 INFO L87 Difference]: Start difference. First operand 3773 states and 5925 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:36,410 INFO L93 Difference]: Finished difference Result 4900 states and 7289 transitions. [2021-12-28 01:53:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:53:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:53:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:36,416 INFO L225 Difference]: With dead ends: 4900 [2021-12-28 01:53:36,416 INFO L226 Difference]: Without dead ends: 3258 [2021-12-28 01:53:36,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:53:36,419 INFO L933 BasicCegarLoop]: 4090 mSDtfsCounter, 48 mSDsluCounter, 12279 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 16369 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:36,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 16369 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3258 states. [2021-12-28 01:53:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3258 to 3222. [2021-12-28 01:53:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3024 states have (on average 1.6537698412698412) internal successors, (5001), 3035 states have internal predecessors, (5001), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-28 01:53:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 5232 transitions. [2021-12-28 01:53:36,485 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 5232 transitions. Word has length 136 [2021-12-28 01:53:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 3222 states and 5232 transitions. [2021-12-28 01:53:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 5232 transitions. [2021-12-28 01:53:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:53:36,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:36,487 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:36,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:36,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 01:53:36,704 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:36,705 INFO L85 PathProgramCache]: Analyzing trace with hash 731116351, now seen corresponding path program 1 times [2021-12-28 01:53:36,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:36,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383403269] [2021-12-28 01:53:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:36,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-28 01:53:36,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383403269] [2021-12-28 01:53:36,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383403269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:53:36,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285310250] [2021-12-28 01:53:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:36,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:53:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:53:36,781 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 01:53:36,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 01:53:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 01:53:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:53:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 01:53:37,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 01:53:37,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285310250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:37,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 01:53:37,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-28 01:53:37,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837443899] [2021-12-28 01:53:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:53:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:53:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:53:37,087 INFO L87 Difference]: Start difference. First operand 3222 states and 5232 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:37,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:37,174 INFO L93 Difference]: Finished difference Result 4341 states and 6571 transitions. [2021-12-28 01:53:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:53:37,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 136 [2021-12-28 01:53:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:37,180 INFO L225 Difference]: With dead ends: 4341 [2021-12-28 01:53:37,180 INFO L226 Difference]: Without dead ends: 3250 [2021-12-28 01:53:37,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:53:37,183 INFO L933 BasicCegarLoop]: 4089 mSDtfsCounter, 10 mSDsluCounter, 12266 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16355 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:37,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16355 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:53:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-12-28 01:53:37,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3234. [2021-12-28 01:53:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3036 states have (on average 1.6442687747035574) internal successors, (4992), 3047 states have internal predecessors, (4992), 110 states have call successors, (110), 79 states have call predecessors, (110), 86 states have return successors, (121), 108 states have call predecessors, (121), 110 states have call successors, (121) [2021-12-28 01:53:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 5223 transitions. [2021-12-28 01:53:37,252 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 5223 transitions. Word has length 136 [2021-12-28 01:53:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:37,252 INFO L470 AbstractCegarLoop]: Abstraction has 3234 states and 5223 transitions. [2021-12-28 01:53:37,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 01:53:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 5223 transitions. [2021-12-28 01:53:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:53:37,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:37,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:37,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 01:53:37,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 01:53:37,467 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:37,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:37,467 INFO L85 PathProgramCache]: Analyzing trace with hash -26178757, now seen corresponding path program 1 times [2021-12-28 01:53:37,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:37,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633175263] [2021-12-28 01:53:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:37,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:37,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-28 01:53:37,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:37,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633175263] [2021-12-28 01:53:37,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633175263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:37,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:37,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:53:37,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340885965] [2021-12-28 01:53:37,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:37,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:53:37,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:37,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:53:37,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:53:37,575 INFO L87 Difference]: Start difference. First operand 3234 states and 5223 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 01:53:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:38,143 INFO L93 Difference]: Finished difference Result 4191 states and 6295 transitions. [2021-12-28 01:53:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 01:53:38,144 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 136 [2021-12-28 01:53:38,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:38,150 INFO L225 Difference]: With dead ends: 4191 [2021-12-28 01:53:38,150 INFO L226 Difference]: Without dead ends: 4189 [2021-12-28 01:53:38,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:53:38,151 INFO L933 BasicCegarLoop]: 4160 mSDtfsCounter, 4428 mSDsluCounter, 12146 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4451 SdHoareTripleChecker+Valid, 16306 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:38,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4451 Valid, 16306 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:53:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-12-28 01:53:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3610. [2021-12-28 01:53:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3346 states have (on average 1.5971309025702332) internal successors, (5344), 3361 states have internal predecessors, (5344), 144 states have call successors, (144), 103 states have call predecessors, (144), 118 states have return successors, (163), 146 states have call predecessors, (163), 144 states have call successors, (163) [2021-12-28 01:53:38,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 5651 transitions. [2021-12-28 01:53:38,248 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 5651 transitions. Word has length 136 [2021-12-28 01:53:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:38,249 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 5651 transitions. [2021-12-28 01:53:38,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-12-28 01:53:38,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 5651 transitions. [2021-12-28 01:53:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-28 01:53:38,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:38,252 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:38,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:53:38,252 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash -970573154, now seen corresponding path program 2 times [2021-12-28 01:53:38,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:38,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213802636] [2021-12-28 01:53:38,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:38,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 01:53:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-28 01:53:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 01:53:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-28 01:53:38,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 01:53:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-28 01:53:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 01:53:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-28 01:53:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 01:53:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-28 01:53:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-28 01:53:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-28 01:53:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-28 01:53:38,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:38,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213802636] [2021-12-28 01:53:38,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213802636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:38,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:38,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:53:38,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56976760] [2021-12-28 01:53:38,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:38,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:53:38,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:38,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:53:38,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:53:38,323 INFO L87 Difference]: Start difference. First operand 3610 states and 5651 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 01:53:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:38,794 INFO L93 Difference]: Finished difference Result 5333 states and 7624 transitions. [2021-12-28 01:53:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 01:53:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 175 [2021-12-28 01:53:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:38,799 INFO L225 Difference]: With dead ends: 5333 [2021-12-28 01:53:38,799 INFO L226 Difference]: Without dead ends: 2123 [2021-12-28 01:53:38,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:53:38,804 INFO L933 BasicCegarLoop]: 4120 mSDtfsCounter, 4539 mSDsluCounter, 12130 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4554 SdHoareTripleChecker+Valid, 16250 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:38,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4554 Valid, 16250 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 01:53:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-12-28 01:53:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2123. [2021-12-28 01:53:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 1.8656927426955703) internal successors, (3959), 2122 states have internal predecessors, (3959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 3959 transitions. [2021-12-28 01:53:38,825 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 3959 transitions. Word has length 175 [2021-12-28 01:53:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:38,825 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 3959 transitions. [2021-12-28 01:53:38,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 4 states have internal predecessors, (92), 5 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-12-28 01:53:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 3959 transitions. [2021-12-28 01:53:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1687 [2021-12-28 01:53:38,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:38,863 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:53:38,863 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:38,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1675397453, now seen corresponding path program 1 times [2021-12-28 01:53:38,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:38,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125765076] [2021-12-28 01:53:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:39,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:39,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125765076] [2021-12-28 01:53:39,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125765076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:39,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:39,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:53:39,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195831024] [2021-12-28 01:53:39,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:39,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:39,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:53:39,537 INFO L87 Difference]: Start difference. First operand 2123 states and 3959 transitions. Second operand has 3 states, 3 states have (on average 562.0) internal successors, (1686), 2 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:44,545 INFO L93 Difference]: Finished difference Result 6058 states and 11375 transitions. [2021-12-28 01:53:44,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:44,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 562.0) internal successors, (1686), 2 states have internal predecessors, (1686), 0 states have call successors, (0), 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 1686 [2021-12-28 01:53:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:44,555 INFO L225 Difference]: With dead ends: 6058 [2021-12-28 01:53:44,558 INFO L226 Difference]: Without dead ends: 3938 [2021-12-28 01:53:44,561 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 [2021-12-28 01:53:44,562 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 581 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 2591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 7542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2591 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:44,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 1412 Invalid, 7542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2591 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-28 01:53:44,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-12-28 01:53:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3922. [2021-12-28 01:53:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 1.7309359857179292) internal successors, (6787), 3921 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 6787 transitions. [2021-12-28 01:53:44,616 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 6787 transitions. Word has length 1686 [2021-12-28 01:53:44,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:44,618 INFO L470 AbstractCegarLoop]: Abstraction has 3922 states and 6787 transitions. [2021-12-28 01:53:44,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 562.0) internal successors, (1686), 2 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 6787 transitions. [2021-12-28 01:53:44,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1698 [2021-12-28 01:53:44,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:44,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:44,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:53:44,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:44,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1468236906, now seen corresponding path program 1 times [2021-12-28 01:53:44,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:44,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297197948] [2021-12-28 01:53:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:44,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:45,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:45,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297197948] [2021-12-28 01:53:45,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297197948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:45,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:45,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:53:45,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50024954] [2021-12-28 01:53:45,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:45,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:45,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:45,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:45,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:53:45,111 INFO L87 Difference]: Start difference. First operand 3922 states and 6787 transitions. Second operand has 3 states, 3 states have (on average 565.6666666666666) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:48,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:48,721 INFO L93 Difference]: Finished difference Result 11273 states and 19664 transitions. [2021-12-28 01:53:48,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:48,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 565.6666666666666) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1697 [2021-12-28 01:53:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:48,768 INFO L225 Difference]: With dead ends: 11273 [2021-12-28 01:53:48,768 INFO L226 Difference]: Without dead ends: 7354 [2021-12-28 01:53:48,773 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 [2021-12-28 01:53:48,773 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 2704 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 2374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2704 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 6848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2374 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:48,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2704 Valid, 1696 Invalid, 6848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2374 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-28 01:53:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7354 states. [2021-12-28 01:53:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7354 to 7352. [2021-12-28 01:53:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7352 states, 7351 states have (on average 1.5521697728200246) internal successors, (11410), 7351 states have internal predecessors, (11410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:48,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7352 states to 7352 states and 11410 transitions. [2021-12-28 01:53:48,947 INFO L78 Accepts]: Start accepts. Automaton has 7352 states and 11410 transitions. Word has length 1697 [2021-12-28 01:53:48,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:48,948 INFO L470 AbstractCegarLoop]: Abstraction has 7352 states and 11410 transitions. [2021-12-28 01:53:48,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 565.6666666666666) internal successors, (1697), 2 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:48,948 INFO L276 IsEmpty]: Start isEmpty. Operand 7352 states and 11410 transitions. [2021-12-28 01:53:48,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1716 [2021-12-28 01:53:48,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:48,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:48,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 01:53:48,980 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash 755213852, now seen corresponding path program 1 times [2021-12-28 01:53:48,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331243076] [2021-12-28 01:53:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:48,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:49,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331243076] [2021-12-28 01:53:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331243076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:49,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:49,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:53:49,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482877927] [2021-12-28 01:53:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:49,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:49,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:49,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:49,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:53:49,365 INFO L87 Difference]: Start difference. First operand 7352 states and 11410 transitions. Second operand has 3 states, 3 states have (on average 571.6666666666666) internal successors, (1715), 3 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:54,152 INFO L93 Difference]: Finished difference Result 21535 states and 33517 transitions. [2021-12-28 01:53:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 571.6666666666666) internal successors, (1715), 3 states have internal predecessors, (1715), 0 states have call successors, (0), 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 1715 [2021-12-28 01:53:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:54,171 INFO L225 Difference]: With dead ends: 21535 [2021-12-28 01:53:54,171 INFO L226 Difference]: Without dead ends: 14186 [2021-12-28 01:53:54,177 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 [2021-12-28 01:53:54,177 INFO L933 BasicCegarLoop]: 3609 mSDtfsCounter, 2170 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 4761 mSolverCounterSat, 2214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2170 SdHoareTripleChecker+Valid, 3855 SdHoareTripleChecker+Invalid, 6975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2214 IncrementalHoareTripleChecker+Valid, 4761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:54,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2170 Valid, 3855 Invalid, 6975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2214 Valid, 4761 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-28 01:53:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-12-28 01:53:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 14181. [2021-12-28 01:53:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14181 states, 14180 states have (on average 1.3787729196050775) internal successors, (19551), 14180 states have internal predecessors, (19551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14181 states to 14181 states and 19551 transitions. [2021-12-28 01:53:54,324 INFO L78 Accepts]: Start accepts. Automaton has 14181 states and 19551 transitions. Word has length 1715 [2021-12-28 01:53:54,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:54,324 INFO L470 AbstractCegarLoop]: Abstraction has 14181 states and 19551 transitions. [2021-12-28 01:53:54,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 571.6666666666666) internal successors, (1715), 3 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:54,325 INFO L276 IsEmpty]: Start isEmpty. Operand 14181 states and 19551 transitions. [2021-12-28 01:53:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1733 [2021-12-28 01:53:54,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:54,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:54,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 01:53:54,361 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1786550159, now seen corresponding path program 1 times [2021-12-28 01:53:54,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:54,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656549816] [2021-12-28 01:53:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:54,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:54,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656549816] [2021-12-28 01:53:54,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656549816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:54,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:54,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:53:54,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647675417] [2021-12-28 01:53:54,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:54,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:53:54,742 INFO L87 Difference]: Start difference. First operand 14181 states and 19551 transitions. Second operand has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 2 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:58,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:53:58,908 INFO L93 Difference]: Finished difference Result 41939 states and 57854 transitions. [2021-12-28 01:53:58,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:53:58,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 2 states have internal predecessors, (1732), 0 states have call successors, (0), 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 1732 [2021-12-28 01:53:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:53:58,952 INFO L225 Difference]: With dead ends: 41939 [2021-12-28 01:53:58,952 INFO L226 Difference]: Without dead ends: 27761 [2021-12-28 01:53:58,972 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 [2021-12-28 01:53:58,974 INFO L933 BasicCegarLoop]: 1081 mSDtfsCounter, 3145 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4773 mSolverCounterSat, 2129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3145 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 6902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2129 IncrementalHoareTripleChecker+Valid, 4773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-28 01:53:58,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3145 Valid, 1168 Invalid, 6902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2129 Valid, 4773 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-12-28 01:53:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27761 states. [2021-12-28 01:53:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27761 to 27761. [2021-12-28 01:53:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27761 states, 27760 states have (on average 1.325756484149856) internal successors, (36803), 27760 states have internal predecessors, (36803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27761 states to 27761 states and 36803 transitions. [2021-12-28 01:53:59,289 INFO L78 Accepts]: Start accepts. Automaton has 27761 states and 36803 transitions. Word has length 1732 [2021-12-28 01:53:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:53:59,289 INFO L470 AbstractCegarLoop]: Abstraction has 27761 states and 36803 transitions. [2021-12-28 01:53:59,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 577.3333333333334) internal successors, (1732), 2 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:53:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 27761 states and 36803 transitions. [2021-12-28 01:53:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1792 [2021-12-28 01:53:59,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:53:59,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:53:59,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 01:53:59,339 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:53:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:53:59,340 INFO L85 PathProgramCache]: Analyzing trace with hash 8163919, now seen corresponding path program 1 times [2021-12-28 01:53:59,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:53:59,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103507027] [2021-12-28 01:53:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:53:59,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:53:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:53:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:53:59,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:53:59,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103507027] [2021-12-28 01:53:59,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103507027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:53:59,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:53:59,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:53:59,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525587211] [2021-12-28 01:53:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:53:59,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:53:59,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:53:59,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:53:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:53:59,758 INFO L87 Difference]: Start difference. First operand 27761 states and 36803 transitions. Second operand has 3 states, 3 states have (on average 597.0) internal successors, (1791), 2 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:04,270 INFO L93 Difference]: Finished difference Result 69127 states and 90662 transitions. [2021-12-28 01:54:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:54:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 597.0) internal successors, (1791), 2 states have internal predecessors, (1791), 0 states have call successors, (0), 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 1791 [2021-12-28 01:54:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:04,360 INFO L225 Difference]: With dead ends: 69127 [2021-12-28 01:54:04,360 INFO L226 Difference]: Without dead ends: 41369 [2021-12-28 01:54:04,402 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 [2021-12-28 01:54:04,421 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1962 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 5812 mSolverCounterSat, 1286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 7098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1286 IncrementalHoareTripleChecker+Valid, 5812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:04,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1962 Valid, 1687 Invalid, 7098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1286 Valid, 5812 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-28 01:54:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41369 states. [2021-12-28 01:54:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41369 to 41347. [2021-12-28 01:54:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41347 states, 41346 states have (on average 1.2133700962608234) internal successors, (50168), 41346 states have internal predecessors, (50168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41347 states to 41347 states and 50168 transitions. [2021-12-28 01:54:04,926 INFO L78 Accepts]: Start accepts. Automaton has 41347 states and 50168 transitions. Word has length 1791 [2021-12-28 01:54:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:04,927 INFO L470 AbstractCegarLoop]: Abstraction has 41347 states and 50168 transitions. [2021-12-28 01:54:04,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 597.0) internal successors, (1791), 2 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 41347 states and 50168 transitions. [2021-12-28 01:54:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1796 [2021-12-28 01:54:04,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:04,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:04,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 01:54:04,976 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1028466760, now seen corresponding path program 1 times [2021-12-28 01:54:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:04,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849243112] [2021-12-28 01:54:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:04,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:54:05,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:05,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849243112] [2021-12-28 01:54:05,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849243112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:05,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:05,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:54:05,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082081892] [2021-12-28 01:54:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:05,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:54:05,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:54:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:54:05,622 INFO L87 Difference]: Start difference. First operand 41347 states and 50168 transitions. Second operand has 3 states, 3 states have (on average 598.3333333333334) internal successors, (1795), 3 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:09,713 INFO L93 Difference]: Finished difference Result 96296 states and 117553 transitions. [2021-12-28 01:54:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:54:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 598.3333333333334) internal successors, (1795), 3 states have internal predecessors, (1795), 0 states have call successors, (0), 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 1795 [2021-12-28 01:54:09,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:09,790 INFO L225 Difference]: With dead ends: 96296 [2021-12-28 01:54:09,790 INFO L226 Difference]: Without dead ends: 54952 [2021-12-28 01:54:09,818 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 [2021-12-28 01:54:09,819 INFO L933 BasicCegarLoop]: 3801 mSDtfsCounter, 142 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5695 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 4070 SdHoareTripleChecker+Invalid, 6605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 5695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:09,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 4070 Invalid, 6605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 5695 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-28 01:54:09,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54952 states. [2021-12-28 01:54:10,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54952 to 54931. [2021-12-28 01:54:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54931 states, 54930 states have (on average 1.1842708902239214) internal successors, (65052), 54930 states have internal predecessors, (65052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54931 states to 54931 states and 65052 transitions. [2021-12-28 01:54:10,329 INFO L78 Accepts]: Start accepts. Automaton has 54931 states and 65052 transitions. Word has length 1795 [2021-12-28 01:54:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 54931 states and 65052 transitions. [2021-12-28 01:54:10,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 598.3333333333334) internal successors, (1795), 3 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:10,330 INFO L276 IsEmpty]: Start isEmpty. Operand 54931 states and 65052 transitions. [2021-12-28 01:54:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1810 [2021-12-28 01:54:10,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:10,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:10,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 01:54:10,596 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1769544578, now seen corresponding path program 1 times [2021-12-28 01:54:10,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:10,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046986020] [2021-12-28 01:54:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:10,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-28 01:54:11,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:11,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046986020] [2021-12-28 01:54:11,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046986020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:11,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:11,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:54:11,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006854671] [2021-12-28 01:54:11,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:11,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:54:11,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:11,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:54:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:54:11,138 INFO L87 Difference]: Start difference. First operand 54931 states and 65052 transitions. Second operand has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:54:15,913 INFO L93 Difference]: Finished difference Result 137024 states and 161390 transitions. [2021-12-28 01:54:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:54:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 0 states have call successors, (0), 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 1809 [2021-12-28 01:54:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:54:16,012 INFO L225 Difference]: With dead ends: 137024 [2021-12-28 01:54:16,012 INFO L226 Difference]: Without dead ends: 82096 [2021-12-28 01:54:16,040 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 [2021-12-28 01:54:16,042 INFO L933 BasicCegarLoop]: 1530 mSDtfsCounter, 2557 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4778 mSolverCounterSat, 1698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2557 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 6476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1698 IncrementalHoareTripleChecker+Valid, 4778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:54:16,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2557 Valid, 1711 Invalid, 6476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1698 Valid, 4778 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-28 01:54:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82096 states. [2021-12-28 01:54:16,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82096 to 75295. [2021-12-28 01:54:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75295 states, 75294 states have (on average 1.1002735941774908) internal successors, (82844), 75294 states have internal predecessors, (82844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75295 states to 75295 states and 82844 transitions. [2021-12-28 01:54:17,003 INFO L78 Accepts]: Start accepts. Automaton has 75295 states and 82844 transitions. Word has length 1809 [2021-12-28 01:54:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:54:17,004 INFO L470 AbstractCegarLoop]: Abstraction has 75295 states and 82844 transitions. [2021-12-28 01:54:17,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 569.0) internal successors, (1707), 3 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:54:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75295 states and 82844 transitions. [2021-12-28 01:54:17,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1961 [2021-12-28 01:54:17,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:54:17,091 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:54:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 01:54:17,091 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:54:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:54:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -371720193, now seen corresponding path program 1 times [2021-12-28 01:54:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:54:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897000013] [2021-12-28 01:54:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:54:17,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:54:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:54:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:54:18,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:54:18,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897000013] [2021-12-28 01:54:18,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897000013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:54:18,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:54:18,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:54:18,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386864725] [2021-12-28 01:54:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:54:18,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:54:18,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:54:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:54:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:54:18,187 INFO L87 Difference]: Start difference. First operand 75295 states and 82844 transitions. Second operand has 3 states, 3 states have (on average 653.3333333333334) internal successors, (1960), 3 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)