./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.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 5af223e668aa8b86ae636f9439d9ac4f153fc620faa9da4461ac4ba5e2c60ee8 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:01:27,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:01:27,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:01:27,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:01:27,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:01:27,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:01:27,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:01:27,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:01:27,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:01:27,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:01:27,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:01:27,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:01:27,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:01:27,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:01:27,948 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:01:27,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:01:27,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:01:27,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:01:27,956 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:01:27,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:01:27,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:01:27,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:01:27,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:01:27,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:01:27,966 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:01:27,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:01:27,967 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:01:27,968 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:01:27,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:01:27,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:01:27,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:01:27,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:01:27,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:01:27,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:01:27,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:01:27,973 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:01:27,974 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:01:27,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:01:27,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:01:27,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:01:27,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:01:27,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:01:28,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:01:28,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:01:28,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:01:28,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:01:28,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:01:28,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:01:28,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:01:28,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:01:28,005 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:01:28,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:01:28,006 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:01:28,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:01:28,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:01:28,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:01:28,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:01:28,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:01:28,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:01:28,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:01:28,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:01:28,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:28,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:01:28,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:01:28,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:01:28,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:01:28,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5af223e668aa8b86ae636f9439d9ac4f153fc620faa9da4461ac4ba5e2c60ee8 [2021-12-14 16:01:28,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:01:28,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:01:28,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:01:28,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:01:28,209 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:01:28,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:01:28,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/411f4c32a/006ee21b49f24821b09af193d0e25d08/FLAG878a335e6 [2021-12-14 16:01:28,827 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:01:28,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:01:28,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/411f4c32a/006ee21b49f24821b09af193d0e25d08/FLAG878a335e6 [2021-12-14 16:01:29,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/411f4c32a/006ee21b49f24821b09af193d0e25d08 [2021-12-14 16:01:29,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:01:29,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:01:29,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:29,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:01:29,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:01:29,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:29" (1/1) ... [2021-12-14 16:01:29,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39f46254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:29, skipping insertion in model container [2021-12-14 16:01:29,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:01:29" (1/1) ... [2021-12-14 16:01:29,256 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:01:29,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:01:29,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6450,6463] [2021-12-14 16:01:29,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8325,8338] [2021-12-14 16:01:30,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:30,302 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:01:30,336 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[6450,6463] [2021-12-14 16:01:30,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c[8325,8338] [2021-12-14 16:01:30,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:01:30,720 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:01:30,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30 WrapperNode [2021-12-14 16:01:30,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:01:30,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:30,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:01:30,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:01:30,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:30,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,008 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-14 16:01:31,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:01:31,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:01:31,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:01:31,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:01:31,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,228 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:01:31,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:01:31,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:01:31,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:01:31,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (1/1) ... [2021-12-14 16:01:31,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:01:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:31,349 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) [2021-12-14 16:01:31,355 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 [2021-12-14 16:01:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:01:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:01:31,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:01:31,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:01:31,452 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:01:31,453 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:01:34,109 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:01:34,119 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:01:34,119 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:01:34,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:34 BoogieIcfgContainer [2021-12-14 16:01:34,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:01:34,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:01:34,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:01:34,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:01:34,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:01:29" (1/3) ... [2021-12-14 16:01:34,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7034b43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:34, skipping insertion in model container [2021-12-14 16:01:34,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:01:30" (2/3) ... [2021-12-14 16:01:34,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7034b43e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:01:34, skipping insertion in model container [2021-12-14 16:01:34,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:01:34" (3/3) ... [2021-12-14 16:01:34,127 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:01:34,130 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:01:34,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:01:34,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:01:34,167 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 [2021-12-14 16:01:34,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:01:34,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:34,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 16:01:34,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:34,190 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:34,191 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1728623957, now seen corresponding path program 1 times [2021-12-14 16:01:34,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:34,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146668928] [2021-12-14 16:01:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:34,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:34,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:34,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146668928] [2021-12-14 16:01:34,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146668928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:34,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:34,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:01:34,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882341588] [2021-12-14 16:01:34,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:34,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:34,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:34,336 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:37,219 INFO L93 Difference]: Finished difference Result 2491 states and 4798 transitions. [2021-12-14 16:01:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-14 16:01:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:37,246 INFO L225 Difference]: With dead ends: 2491 [2021-12-14 16:01:37,246 INFO L226 Difference]: Without dead ends: 1565 [2021-12-14 16:01:37,252 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 [2021-12-14 16:01:37,255 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 916 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:37,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [916 Valid, 580 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 16:01:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-14 16:01:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-14 16:01:37,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6397952655150352) internal successors, (2563), 1564 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2563 transitions. [2021-12-14 16:01:37,365 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2563 transitions. Word has length 16 [2021-12-14 16:01:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:37,366 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2563 transitions. [2021-12-14 16:01:37,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2563 transitions. [2021-12-14 16:01:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-14 16:01:37,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:37,367 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] [2021-12-14 16:01:37,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:01:37,377 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-14 16:01:37,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:37,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254718916] [2021-12-14 16:01:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:37,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:37,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:37,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254718916] [2021-12-14 16:01:37,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254718916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:37,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:37,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:37,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872445408] [2021-12-14 16:01:37,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:37,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:37,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:37,488 INFO L87 Difference]: Start difference. First operand 1565 states and 2563 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:37,533 INFO L93 Difference]: Finished difference Result 1607 states and 2626 transitions. [2021-12-14 16:01:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:37,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-14 16:01:37,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:37,538 INFO L225 Difference]: With dead ends: 1607 [2021-12-14 16:01:37,538 INFO L226 Difference]: Without dead ends: 1565 [2021-12-14 16:01:37,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:37,543 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:37,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:37,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-12-14 16:01:37,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2021-12-14 16:01:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1563 states have (on average 1.6295585412667946) internal successors, (2547), 1564 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 2547 transitions. [2021-12-14 16:01:37,574 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 2547 transitions. Word has length 26 [2021-12-14 16:01:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:37,575 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 2547 transitions. [2021-12-14 16:01:37,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 2547 transitions. [2021-12-14 16:01:37,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:37,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:37,581 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] [2021-12-14 16:01:37,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:01:37,581 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:37,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-14 16:01:37,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:37,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432903517] [2021-12-14 16:01:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:37,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:37,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:37,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432903517] [2021-12-14 16:01:37,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432903517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:37,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:37,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:37,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197355155] [2021-12-14 16:01:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:37,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:37,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:37,663 INFO L87 Difference]: Start difference. First operand 1565 states and 2547 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:37,688 INFO L93 Difference]: Finished difference Result 1635 states and 2655 transitions. [2021-12-14 16:01:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:37,693 INFO L225 Difference]: With dead ends: 1635 [2021-12-14 16:01:37,693 INFO L226 Difference]: Without dead ends: 1597 [2021-12-14 16:01:37,695 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 [2021-12-14 16:01:37,699 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-12-14 16:01:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1595. [2021-12-14 16:01:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1593 states have (on average 1.628374136848713) internal successors, (2594), 1594 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 2594 transitions. [2021-12-14 16:01:37,723 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 2594 transitions. Word has length 41 [2021-12-14 16:01:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:37,724 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 2594 transitions. [2021-12-14 16:01:37,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 2594 transitions. [2021-12-14 16:01:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:37,728 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:37,728 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] [2021-12-14 16:01:37,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:01:37,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-14 16:01:37,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:37,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869748001] [2021-12-14 16:01:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:37,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:37,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:37,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869748001] [2021-12-14 16:01:37,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869748001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:37,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:37,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:37,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037608948] [2021-12-14 16:01:37,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:37,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:37,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:37,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:37,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:37,811 INFO L87 Difference]: Start difference. First operand 1595 states and 2594 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:37,834 INFO L93 Difference]: Finished difference Result 1719 states and 2786 transitions. [2021-12-14 16:01:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:37,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:37,840 INFO L225 Difference]: With dead ends: 1719 [2021-12-14 16:01:37,840 INFO L226 Difference]: Without dead ends: 1651 [2021-12-14 16:01:37,840 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 [2021-12-14 16:01:37,845 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:37,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-12-14 16:01:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1649. [2021-12-14 16:01:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1647 states have (on average 1.6253794778384942) internal successors, (2677), 1648 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2677 transitions. [2021-12-14 16:01:37,875 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2677 transitions. Word has length 41 [2021-12-14 16:01:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:37,875 INFO L470 AbstractCegarLoop]: Abstraction has 1649 states and 2677 transitions. [2021-12-14 16:01:37,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2677 transitions. [2021-12-14 16:01:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 16:01:37,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:37,878 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] [2021-12-14 16:01:37,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:01:37,878 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-14 16:01:37,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:37,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142334456] [2021-12-14 16:01:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:37,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:37,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:37,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142334456] [2021-12-14 16:01:37,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142334456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:37,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:37,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:37,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661514844] [2021-12-14 16:01:37,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:37,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:37,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:37,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:37,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:37,989 INFO L87 Difference]: Start difference. First operand 1649 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,071 INFO L93 Difference]: Finished difference Result 2381 states and 3811 transitions. [2021-12-14 16:01:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:38,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-14 16:01:38,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,079 INFO L225 Difference]: With dead ends: 2381 [2021-12-14 16:01:38,079 INFO L226 Difference]: Without dead ends: 2259 [2021-12-14 16:01:38,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:38,080 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-12-14 16:01:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1769. [2021-12-14 16:01:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1767 states have (on average 1.6168647425014149) internal successors, (2857), 1768 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2857 transitions. [2021-12-14 16:01:38,114 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2857 transitions. Word has length 41 [2021-12-14 16:01:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,117 INFO L470 AbstractCegarLoop]: Abstraction has 1769 states and 2857 transitions. [2021-12-14 16:01:38,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2857 transitions. [2021-12-14 16:01:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:38,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,118 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] [2021-12-14 16:01:38,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:01:38,118 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-14 16:01:38,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222404185] [2021-12-14 16:01:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:38,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222404185] [2021-12-14 16:01:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222404185] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020471692] [2021-12-14 16:01:38,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:38,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:38,157 INFO L87 Difference]: Start difference. First operand 1769 states and 2857 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,187 INFO L93 Difference]: Finished difference Result 2209 states and 3519 transitions. [2021-12-14 16:01:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,193 INFO L225 Difference]: With dead ends: 2209 [2021-12-14 16:01:38,193 INFO L226 Difference]: Without dead ends: 1967 [2021-12-14 16:01:38,193 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 [2021-12-14 16:01:38,194 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-14 16:01:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1957. [2021-12-14 16:01:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5964194373401535) internal successors, (3121), 1956 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3121 transitions. [2021-12-14 16:01:38,229 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3121 transitions. Word has length 43 [2021-12-14 16:01:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,229 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3121 transitions. [2021-12-14 16:01:38,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3121 transitions. [2021-12-14 16:01:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 16:01:38,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,230 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] [2021-12-14 16:01:38,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:01:38,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-14 16:01:38,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499088265] [2021-12-14 16:01:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:38,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499088265] [2021-12-14 16:01:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499088265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:38,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122354412] [2021-12-14 16:01:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:38,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:38,295 INFO L87 Difference]: Start difference. First operand 1957 states and 3121 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,356 INFO L93 Difference]: Finished difference Result 2389 states and 3755 transitions. [2021-12-14 16:01:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-14 16:01:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,364 INFO L225 Difference]: With dead ends: 2389 [2021-12-14 16:01:38,364 INFO L226 Difference]: Without dead ends: 1959 [2021-12-14 16:01:38,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:01:38,367 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-12-14 16:01:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1957. [2021-12-14 16:01:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1955 states have (on average 1.5923273657289003) internal successors, (3113), 1956 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 3113 transitions. [2021-12-14 16:01:38,405 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 3113 transitions. Word has length 43 [2021-12-14 16:01:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,406 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 3113 transitions. [2021-12-14 16:01:38,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 3113 transitions. [2021-12-14 16:01:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 16:01:38,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,408 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] [2021-12-14 16:01:38,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:01:38,408 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-14 16:01:38,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907689463] [2021-12-14 16:01:38,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:38,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907689463] [2021-12-14 16:01:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907689463] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202181293] [2021-12-14 16:01:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:38,469 INFO L87 Difference]: Start difference. First operand 1957 states and 3113 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,535 INFO L93 Difference]: Finished difference Result 2291 states and 3585 transitions. [2021-12-14 16:01:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:01:38,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-14 16:01:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,543 INFO L225 Difference]: With dead ends: 2291 [2021-12-14 16:01:38,543 INFO L226 Difference]: Without dead ends: 2289 [2021-12-14 16:01:38,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:01:38,545 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-12-14 16:01:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1981. [2021-12-14 16:01:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1979 states have (on average 1.583122789287519) internal successors, (3133), 1980 states have internal predecessors, (3133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3133 transitions. [2021-12-14 16:01:38,581 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3133 transitions. Word has length 44 [2021-12-14 16:01:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,582 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3133 transitions. [2021-12-14 16:01:38,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3133 transitions. [2021-12-14 16:01:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 16:01:38,582 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,582 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] [2021-12-14 16:01:38,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:01:38,583 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-14 16:01:38,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335458009] [2021-12-14 16:01:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:38,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335458009] [2021-12-14 16:01:38,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335458009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:38,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928233046] [2021-12-14 16:01:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:38,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:38,606 INFO L87 Difference]: Start difference. First operand 1981 states and 3133 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,638 INFO L93 Difference]: Finished difference Result 2452 states and 3811 transitions. [2021-12-14 16:01:38,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-14 16:01:38,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,645 INFO L225 Difference]: With dead ends: 2452 [2021-12-14 16:01:38,645 INFO L226 Difference]: Without dead ends: 2185 [2021-12-14 16:01:38,646 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 [2021-12-14 16:01:38,648 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-12-14 16:01:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 2183. [2021-12-14 16:01:38,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2181 states have (on average 1.5639614855570838) internal successors, (3411), 2182 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 3411 transitions. [2021-12-14 16:01:38,689 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 3411 transitions. Word has length 45 [2021-12-14 16:01:38,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,690 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 3411 transitions. [2021-12-14 16:01:38,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 3411 transitions. [2021-12-14 16:01:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:38,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:38,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:01:38,691 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-14 16:01:38,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14159054] [2021-12-14 16:01:38,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:01:38,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:38,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14159054] [2021-12-14 16:01:38,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14159054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:38,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:38,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:38,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222967604] [2021-12-14 16:01:38,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:38,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:38,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:38,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:38,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:38,773 INFO L87 Difference]: Start difference. First operand 2183 states and 3411 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:38,890 INFO L93 Difference]: Finished difference Result 4287 states and 6363 transitions. [2021-12-14 16:01:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 16:01:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:38,900 INFO L225 Difference]: With dead ends: 4287 [2021-12-14 16:01:38,901 INFO L226 Difference]: Without dead ends: 3633 [2021-12-14 16:01:38,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:38,902 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:38,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:38,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2021-12-14 16:01:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 2835. [2021-12-14 16:01:38,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2833 states have (on average 1.524532297917402) internal successors, (4319), 2834 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 4319 transitions. [2021-12-14 16:01:38,985 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 4319 transitions. Word has length 64 [2021-12-14 16:01:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:38,985 INFO L470 AbstractCegarLoop]: Abstraction has 2835 states and 4319 transitions. [2021-12-14 16:01:38,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 4319 transitions. [2021-12-14 16:01:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 16:01:38,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:38,987 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:38,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:01:38,987 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:38,988 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-14 16:01:38,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:38,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423393882] [2021-12-14 16:01:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:38,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 16:01:39,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423393882] [2021-12-14 16:01:39,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423393882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:39,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:39,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:39,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445452259] [2021-12-14 16:01:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:39,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:39,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:39,040 INFO L87 Difference]: Start difference. First operand 2835 states and 4319 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:39,177 INFO L93 Difference]: Finished difference Result 4939 states and 7271 transitions. [2021-12-14 16:01:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 16:01:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:39,206 INFO L225 Difference]: With dead ends: 4939 [2021-12-14 16:01:39,206 INFO L226 Difference]: Without dead ends: 4285 [2021-12-14 16:01:39,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:39,209 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:39,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2021-12-14 16:01:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 3815. [2021-12-14 16:01:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3815 states, 3813 states have (on average 1.4872803566745345) internal successors, (5671), 3814 states have internal predecessors, (5671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3815 states to 3815 states and 5671 transitions. [2021-12-14 16:01:39,352 INFO L78 Accepts]: Start accepts. Automaton has 3815 states and 5671 transitions. Word has length 64 [2021-12-14 16:01:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:39,352 INFO L470 AbstractCegarLoop]: Abstraction has 3815 states and 5671 transitions. [2021-12-14 16:01:39,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3815 states and 5671 transitions. [2021-12-14 16:01:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:39,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:39,355 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:39,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:01:39,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-14 16:01:39,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:39,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694928034] [2021-12-14 16:01:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:39,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:39,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:39,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694928034] [2021-12-14 16:01:39,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694928034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:39,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:39,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:01:39,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550788314] [2021-12-14 16:01:39,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:39,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:01:39,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:01:39,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:01:39,396 INFO L87 Difference]: Start difference. First operand 3815 states and 5671 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:39,470 INFO L93 Difference]: Finished difference Result 5465 states and 7995 transitions. [2021-12-14 16:01:39,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:01:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 16:01:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:39,476 INFO L225 Difference]: With dead ends: 5465 [2021-12-14 16:01:39,476 INFO L226 Difference]: Without dead ends: 3179 [2021-12-14 16:01:39,479 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 [2021-12-14 16:01:39,479 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:39,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3179 states. [2021-12-14 16:01:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3179 to 3177. [2021-12-14 16:01:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3175 states have (on average 1.506771653543307) internal successors, (4784), 3176 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 4784 transitions. [2021-12-14 16:01:39,610 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 4784 transitions. Word has length 66 [2021-12-14 16:01:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:39,610 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 4784 transitions. [2021-12-14 16:01:39,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 4784 transitions. [2021-12-14 16:01:39,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 16:01:39,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:39,611 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:01:39,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:01:39,612 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-14 16:01:39,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018745552] [2021-12-14 16:01:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:39,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:39,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:39,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018745552] [2021-12-14 16:01:39,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018745552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:01:39,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:01:39,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:01:39,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61891808] [2021-12-14 16:01:39,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:01:39,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:01:39,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:39,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:01:39,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:01:39,654 INFO L87 Difference]: Start difference. First operand 3177 states and 4784 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:39,769 INFO L93 Difference]: Finished difference Result 4577 states and 6756 transitions. [2021-12-14 16:01:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:01:39,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 16:01:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:39,776 INFO L225 Difference]: With dead ends: 4577 [2021-12-14 16:01:39,776 INFO L226 Difference]: Without dead ends: 4111 [2021-12-14 16:01:39,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:01:39,778 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3076 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3076 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:39,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3076 Valid, 3207 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:01:39,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-12-14 16:01:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 3641. [2021-12-14 16:01:39,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3639 states have (on average 1.4927177796097828) internal successors, (5432), 3640 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 5432 transitions. [2021-12-14 16:01:39,884 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 5432 transitions. Word has length 66 [2021-12-14 16:01:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:39,884 INFO L470 AbstractCegarLoop]: Abstraction has 3641 states and 5432 transitions. [2021-12-14 16:01:39,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 5432 transitions. [2021-12-14 16:01:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 16:01:39,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:39,889 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] [2021-12-14 16:01:39,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:01:39,890 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-14 16:01:39,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697376757] [2021-12-14 16:01:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:39,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:40,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697376757] [2021-12-14 16:01:40,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697376757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223502710] [2021-12-14 16:01:40,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:40,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:40,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:40,103 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) [2021-12-14 16:01:40,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 16:01:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 16:01:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:40,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:01:40,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223502710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:40,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:40,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-14 16:01:40,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476858319] [2021-12-14 16:01:40,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:40,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-14 16:01:40,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-14 16:01:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-14 16:01:40,577 INFO L87 Difference]: Start difference. First operand 3641 states and 5432 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:43,380 INFO L93 Difference]: Finished difference Result 22942 states and 31825 transitions. [2021-12-14 16:01:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-14 16:01:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-14 16:01:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:43,408 INFO L225 Difference]: With dead ends: 22942 [2021-12-14 16:01:43,409 INFO L226 Difference]: Without dead ends: 20852 [2021-12-14 16:01:43,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-14 16:01:43,415 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 12164 mSDsluCounter, 5407 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12164 SdHoareTripleChecker+Valid, 6974 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:43,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12164 Valid, 6974 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 16:01:43,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20852 states. [2021-12-14 16:01:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20852 to 12505. [2021-12-14 16:01:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12505 states, 12503 states have (on average 1.3677517395825003) internal successors, (17101), 12504 states have internal predecessors, (17101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12505 states to 12505 states and 17101 transitions. [2021-12-14 16:01:43,961 INFO L78 Accepts]: Start accepts. Automaton has 12505 states and 17101 transitions. Word has length 67 [2021-12-14 16:01:43,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:43,962 INFO L470 AbstractCegarLoop]: Abstraction has 12505 states and 17101 transitions. [2021-12-14 16:01:43,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:43,962 INFO L276 IsEmpty]: Start isEmpty. Operand 12505 states and 17101 transitions. [2021-12-14 16:01:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:01:43,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:43,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:43,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 16:01:44,180 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,SelfDestructingSolverStorable13 [2021-12-14 16:01:44,180 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-14 16:01:44,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710872823] [2021-12-14 16:01:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:44,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:44,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710872823] [2021-12-14 16:01:44,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710872823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:44,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282208504] [2021-12-14 16:01:44,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:44,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:44,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:44,361 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) [2021-12-14 16:01:44,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 16:01:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:44,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:01:44,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:44,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:45,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282208504] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:45,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:45,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-14 16:01:45,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667656633] [2021-12-14 16:01:45,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:45,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 16:01:45,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:45,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 16:01:45,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-14 16:01:45,307 INFO L87 Difference]: Start difference. First operand 12505 states and 17101 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:49,015 INFO L93 Difference]: Finished difference Result 69077 states and 91427 transitions. [2021-12-14 16:01:49,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 16:01:49,035 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:01:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:49,180 INFO L225 Difference]: With dead ends: 69077 [2021-12-14 16:01:49,181 INFO L226 Difference]: Without dead ends: 59809 [2021-12-14 16:01:49,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-14 16:01:49,207 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 16022 mSDsluCounter, 8235 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16022 SdHoareTripleChecker+Valid, 9783 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:49,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16022 Valid, 9783 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 16:01:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59809 states. [2021-12-14 16:01:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59809 to 26974. [2021-12-14 16:01:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26974 states, 26972 states have (on average 1.3456918285629542) internal successors, (36296), 26973 states have internal predecessors, (36296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26974 states to 26974 states and 36296 transitions. [2021-12-14 16:01:50,878 INFO L78 Accepts]: Start accepts. Automaton has 26974 states and 36296 transitions. Word has length 68 [2021-12-14 16:01:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:01:50,878 INFO L470 AbstractCegarLoop]: Abstraction has 26974 states and 36296 transitions. [2021-12-14 16:01:50,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 26974 states and 36296 transitions. [2021-12-14 16:01:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:01:50,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:01:50,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:01:50,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 16:01:51,097 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,SelfDestructingSolverStorable14 [2021-12-14 16:01:51,098 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:01:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:01:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-14 16:01:51,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:01:51,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925679510] [2021-12-14 16:01:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:01:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:01:51,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925679510] [2021-12-14 16:01:51,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925679510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:01:51,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967302118] [2021-12-14 16:01:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:01:51,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:01:51,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:01:51,253 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) [2021-12-14 16:01:51,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 16:01:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:01:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 16:01:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 16:01:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:51,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 16:01:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:01:52,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967302118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 16:01:52,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 16:01:52,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-14 16:01:52,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821102761] [2021-12-14 16:01:52,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 16:01:52,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-14 16:01:52,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:01:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-14 16:01:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-14 16:01:52,149 INFO L87 Difference]: Start difference. First operand 26974 states and 36296 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:01:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:01:56,887 INFO L93 Difference]: Finished difference Result 114365 states and 150745 transitions. [2021-12-14 16:01:56,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-14 16:01:56,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:01:56,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:01:57,038 INFO L225 Difference]: With dead ends: 114365 [2021-12-14 16:01:57,038 INFO L226 Difference]: Without dead ends: 92142 [2021-12-14 16:01:57,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-12-14 16:01:57,083 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 15513 mSDsluCounter, 4845 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15513 SdHoareTripleChecker+Valid, 6376 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:01:57,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15513 Valid, 6376 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 16:01:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92142 states. [2021-12-14 16:02:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92142 to 54011. [2021-12-14 16:02:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54011 states, 54009 states have (on average 1.3203725305041751) internal successors, (71312), 54010 states have internal predecessors, (71312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54011 states to 54011 states and 71312 transitions. [2021-12-14 16:02:00,429 INFO L78 Accepts]: Start accepts. Automaton has 54011 states and 71312 transitions. Word has length 68 [2021-12-14 16:02:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:00,430 INFO L470 AbstractCegarLoop]: Abstraction has 54011 states and 71312 transitions. [2021-12-14 16:02:00,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54011 states and 71312 transitions. [2021-12-14 16:02:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:00,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:00,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:00,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 16:02:00,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:00,643 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:00,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-14 16:02:00,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:00,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557027995] [2021-12-14 16:02:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:00,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:00,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:00,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557027995] [2021-12-14 16:02:00,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557027995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:00,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:00,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:00,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145107947] [2021-12-14 16:02:00,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:00,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:00,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:00,698 INFO L87 Difference]: Start difference. First operand 54011 states and 71312 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:02,524 INFO L93 Difference]: Finished difference Result 78449 states and 102855 transitions. [2021-12-14 16:02:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:02,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:02,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:02,566 INFO L225 Difference]: With dead ends: 78449 [2021-12-14 16:02:02,566 INFO L226 Difference]: Without dead ends: 31369 [2021-12-14 16:02:02,589 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 [2021-12-14 16:02:02,592 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:02,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:02,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31369 states. [2021-12-14 16:02:04,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31369 to 30941. [2021-12-14 16:02:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30941 states, 30939 states have (on average 1.28963444196645) internal successors, (39900), 30940 states have internal predecessors, (39900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30941 states to 30941 states and 39900 transitions. [2021-12-14 16:02:04,127 INFO L78 Accepts]: Start accepts. Automaton has 30941 states and 39900 transitions. Word has length 68 [2021-12-14 16:02:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:04,127 INFO L470 AbstractCegarLoop]: Abstraction has 30941 states and 39900 transitions. [2021-12-14 16:02:04,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30941 states and 39900 transitions. [2021-12-14 16:02:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:04,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:04,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:04,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:02:04,130 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:04,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-14 16:02:04,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:04,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509647017] [2021-12-14 16:02:04,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:04,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:04,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:04,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509647017] [2021-12-14 16:02:04,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509647017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:04,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:04,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:02:04,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350107860] [2021-12-14 16:02:04,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:04,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:02:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:02:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:02:04,161 INFO L87 Difference]: Start difference. First operand 30941 states and 39900 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:04,979 INFO L93 Difference]: Finished difference Result 46927 states and 60114 transitions. [2021-12-14 16:02:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:02:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:05,012 INFO L225 Difference]: With dead ends: 46927 [2021-12-14 16:02:05,013 INFO L226 Difference]: Without dead ends: 20863 [2021-12-14 16:02:05,037 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 [2021-12-14 16:02:05,037 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:05,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20863 states. [2021-12-14 16:02:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20863 to 20861. [2021-12-14 16:02:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20861 states, 20859 states have (on average 1.2684692458890647) internal successors, (26459), 20860 states have internal predecessors, (26459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20861 states to 20861 states and 26459 transitions. [2021-12-14 16:02:06,252 INFO L78 Accepts]: Start accepts. Automaton has 20861 states and 26459 transitions. Word has length 68 [2021-12-14 16:02:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:06,253 INFO L470 AbstractCegarLoop]: Abstraction has 20861 states and 26459 transitions. [2021-12-14 16:02:06,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20861 states and 26459 transitions. [2021-12-14 16:02:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:06,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:06,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:06,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:02:06,258 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-14 16:02:06,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:06,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331016752] [2021-12-14 16:02:06,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:06,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 16:02:06,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:06,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331016752] [2021-12-14 16:02:06,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331016752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:06,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:06,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:06,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061088552] [2021-12-14 16:02:06,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:06,327 INFO L87 Difference]: Start difference. First operand 20861 states and 26459 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:07,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:07,266 INFO L93 Difference]: Finished difference Result 36624 states and 46184 transitions. [2021-12-14 16:02:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:07,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:07,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:07,289 INFO L225 Difference]: With dead ends: 36624 [2021-12-14 16:02:07,289 INFO L226 Difference]: Without dead ends: 17377 [2021-12-14 16:02:07,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:07,343 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4507 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4507 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:07,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4507 Valid, 2968 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17377 states. [2021-12-14 16:02:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17377 to 17377. [2021-12-14 16:02:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17377 states, 17375 states have (on average 1.2587625899280575) internal successors, (21871), 17376 states have internal predecessors, (21871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17377 states to 17377 states and 21871 transitions. [2021-12-14 16:02:08,177 INFO L78 Accepts]: Start accepts. Automaton has 17377 states and 21871 transitions. Word has length 68 [2021-12-14 16:02:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:08,177 INFO L470 AbstractCegarLoop]: Abstraction has 17377 states and 21871 transitions. [2021-12-14 16:02:08,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:08,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17377 states and 21871 transitions. [2021-12-14 16:02:08,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:08,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:08,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:08,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:02:08,180 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:08,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-14 16:02:08,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:08,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906576018] [2021-12-14 16:02:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:08,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 16:02:08,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906576018] [2021-12-14 16:02:08,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906576018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:08,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:08,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:08,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335663030] [2021-12-14 16:02:08,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:08,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:08,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:08,263 INFO L87 Difference]: Start difference. First operand 17377 states and 21871 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:08,955 INFO L93 Difference]: Finished difference Result 28988 states and 36122 transitions. [2021-12-14 16:02:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:08,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:08,976 INFO L225 Difference]: With dead ends: 28988 [2021-12-14 16:02:08,976 INFO L226 Difference]: Without dead ends: 13257 [2021-12-14 16:02:08,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:08,991 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:08,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13257 states. [2021-12-14 16:02:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13257 to 13257. [2021-12-14 16:02:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13257 states, 13255 states have (on average 1.2516031686156168) internal successors, (16590), 13256 states have internal predecessors, (16590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13257 states to 13257 states and 16590 transitions. [2021-12-14 16:02:09,624 INFO L78 Accepts]: Start accepts. Automaton has 13257 states and 16590 transitions. Word has length 68 [2021-12-14 16:02:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:09,624 INFO L470 AbstractCegarLoop]: Abstraction has 13257 states and 16590 transitions. [2021-12-14 16:02:09,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13257 states and 16590 transitions. [2021-12-14 16:02:09,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 16:02:09,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:09,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:02:09,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 16:02:09,626 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:09,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-14 16:02:09,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083512983] [2021-12-14 16:02:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:09,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-14 16:02:09,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:09,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083512983] [2021-12-14 16:02:09,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083512983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:02:09,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:02:09,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:02:09,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888898253] [2021-12-14 16:02:09,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:02:09,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:02:09,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:02:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:02:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:02:09,677 INFO L87 Difference]: Start difference. First operand 13257 states and 16590 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:02:10,240 INFO L93 Difference]: Finished difference Result 22263 states and 27515 transitions. [2021-12-14 16:02:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:02:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 16:02:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:02:10,252 INFO L225 Difference]: With dead ends: 22263 [2021-12-14 16:02:10,252 INFO L226 Difference]: Without dead ends: 10573 [2021-12-14 16:02:10,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:02:10,260 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4563 mSDsluCounter, 1460 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4563 SdHoareTripleChecker+Valid, 2953 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:02:10,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4563 Valid, 2953 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:02:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10573 states. [2021-12-14 16:02:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10573 to 10573. [2021-12-14 16:02:10,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10571 states have (on average 1.2554157600983824) internal successors, (13271), 10572 states have internal predecessors, (13271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 13271 transitions. [2021-12-14 16:02:10,729 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 13271 transitions. Word has length 68 [2021-12-14 16:02:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:02:10,729 INFO L470 AbstractCegarLoop]: Abstraction has 10573 states and 13271 transitions. [2021-12-14 16:02:10,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:02:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 13271 transitions. [2021-12-14 16:02:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 16:02:10,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:02:10,731 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:02:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 16:02:10,731 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:02:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:02:10,731 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-14 16:02:10,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:02:10,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706585088] [2021-12-14 16:02:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:02:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:02:11,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:02:11,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706585088] [2021-12-14 16:02:11,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706585088] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 16:02:11,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304210538] [2021-12-14 16:02:11,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:02:11,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 16:02:11,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:02:11,248 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) [2021-12-14 16:02:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 16:02:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:02:11,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-14 16:02:11,339 INFO L286 TraceCheckSpWp]: Computing forward predicates...