./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label42.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 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:45:01,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:45:01,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:45:01,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:45:01,063 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:45:01,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:45:01,065 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:45:01,066 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:45:01,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:45:01,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:45:01,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:45:01,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:45:01,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:45:01,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:45:01,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:45:01,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:45:01,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:45:01,079 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:45:01,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:45:01,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:45:01,085 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:45:01,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:45:01,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:45:01,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:45:01,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:45:01,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:45:01,092 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:45:01,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:45:01,095 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:45:01,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:45:01,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:45:01,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:45:01,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:45:01,098 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:45:01,099 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:45:01,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:45:01,100 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:45:01,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:45:01,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:45:01,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:45:01,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:45:01,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:45:01,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:45:01,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:45:01,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:45:01,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:45:01,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:45:01,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:45:01,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:45:01,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:45:01,124 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:45:01,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:45:01,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:45:01,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:45:01,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:01,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:45:01,127 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:45:01,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:45:01,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:45:01,128 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0543a7f62c421ec223229fb3e2bfbf903aa6057da67580bb11646235be2c5e7e [2021-12-15 09:45:01,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:45:01,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:45:01,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:45:01,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:45:01,363 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:45:01,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-15 09:45:01,416 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f71461fb/1fbd048bb5f546d98149c575310a827f/FLAG038aa161d [2021-12-15 09:45:01,985 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:45:01,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label42.c [2021-12-15 09:45:02,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f71461fb/1fbd048bb5f546d98149c575310a827f/FLAG038aa161d [2021-12-15 09:45:02,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f71461fb/1fbd048bb5f546d98149c575310a827f [2021-12-15 09:45:02,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:45:02,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:45:02,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:02,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:45:02,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:45:02,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:02" (1/1) ... [2021-12-15 09:45:02,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f8cbea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:02, skipping insertion in model container [2021-12-15 09:45:02,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:45:02" (1/1) ... [2021-12-15 09:45:02,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:45:02,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:45:02,531 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label42.c[9228,9241] [2021-12-15 09:45:03,098 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:03,104 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:45:03,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label42.c[9228,9241] [2021-12-15 09:45:03,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:45:03,496 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:45:03,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03 WrapperNode [2021-12-15 09:45:03,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:45:03,498 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:03,498 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:45:03,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:45:03,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:03,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:03,924 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:45:03,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:45:03,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:45:03,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:45:03,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:45:03,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:03,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:45:04,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:45:04,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:45:04,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:45:04,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (1/1) ... [2021-12-15 09:45:04,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:45:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:04,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:45:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:45:04,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:45:04,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:45:04,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:45:04,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:45:04,553 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:45:04,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:45:07,864 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:45:07,881 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:45:07,881 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:45:07,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:07 BoogieIcfgContainer [2021-12-15 09:45:07,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:45:07,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:45:07,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:45:07,888 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:45:07,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:45:02" (1/3) ... [2021-12-15 09:45:07,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59db5e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:07, skipping insertion in model container [2021-12-15 09:45:07,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:45:03" (2/3) ... [2021-12-15 09:45:07,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59db5e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:45:07, skipping insertion in model container [2021-12-15 09:45:07,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:45:07" (3/3) ... [2021-12-15 09:45:07,891 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label42.c [2021-12-15 09:45:07,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:45:07,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:45:07,938 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:45:07,944 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:45:07,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:45:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:07,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-15 09:45:07,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:07,989 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:07,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:07,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 962891993, now seen corresponding path program 1 times [2021-12-15 09:45:08,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:08,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551773896] [2021-12-15 09:45:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:08,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:08,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:08,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551773896] [2021-12-15 09:45:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551773896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:08,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:08,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:08,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690054669] [2021-12-15 09:45:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:08,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:08,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:08,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:08,233 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 21.666666666666668) internal successors, (65), 2 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) [2021-12-15 09:45:11,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:11,844 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-15 09:45:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-15 09:45:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:11,872 INFO L225 Difference]: With dead ends: 3121 [2021-12-15 09:45:11,872 INFO L226 Difference]: Without dead ends: 1944 [2021-12-15 09:45:11,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:11,882 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:11,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-15 09:45:11,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-15 09:45:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-15 09:45:11,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-15 09:45:11,970 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 65 [2021-12-15 09:45:11,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:11,971 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-15 09:45:11,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 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) [2021-12-15 09:45:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-15 09:45:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-15 09:45:11,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:11,974 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:11,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:45:11,974 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:11,975 INFO L85 PathProgramCache]: Analyzing trace with hash -746498798, now seen corresponding path program 1 times [2021-12-15 09:45:11,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305413941] [2021-12-15 09:45:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:11,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:12,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:12,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305413941] [2021-12-15 09:45:12,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305413941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:12,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:12,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:12,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459991245] [2021-12-15 09:45:12,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:12,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:12,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:12,151 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:16,709 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-15 09:45:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:16,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 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 130 [2021-12-15 09:45:16,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:16,728 INFO L225 Difference]: With dead ends: 6152 [2021-12-15 09:45:16,728 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 09:45:16,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:45:16,732 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2626 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2626 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:16,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2626 Valid, 1019 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:45:16,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 09:45:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-15 09:45:16,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4772143024071045) internal successors, (6321), 4279 states have internal predecessors, (6321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6321 transitions. [2021-12-15 09:45:16,782 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6321 transitions. Word has length 130 [2021-12-15 09:45:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:16,784 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6321 transitions. [2021-12-15 09:45:16,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 3 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6321 transitions. [2021-12-15 09:45:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-15 09:45:16,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:16,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:16,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:45:16,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:16,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1556706877, now seen corresponding path program 1 times [2021-12-15 09:45:16,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:16,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418302796] [2021-12-15 09:45:16,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:16,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:45:16,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418302796] [2021-12-15 09:45:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418302796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:16,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:16,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:16,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369815613] [2021-12-15 09:45:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:16,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:16,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:16,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:16,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:16,925 INFO L87 Difference]: Start difference. First operand 4280 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:19,737 INFO L93 Difference]: Finished difference Result 10955 states and 16961 transitions. [2021-12-15 09:45:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 232 [2021-12-15 09:45:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:19,757 INFO L225 Difference]: With dead ends: 10955 [2021-12-15 09:45:19,758 INFO L226 Difference]: Without dead ends: 7464 [2021-12-15 09:45:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:19,762 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 941 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2535 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 3299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:19,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 868 Invalid, 3299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2535 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7464 states. [2021-12-15 09:45:19,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7464 to 7455. [2021-12-15 09:45:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7455 states, 7454 states have (on average 1.3945532599946338) internal successors, (10395), 7454 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7455 states to 7455 states and 10395 transitions. [2021-12-15 09:45:19,855 INFO L78 Accepts]: Start accepts. Automaton has 7455 states and 10395 transitions. Word has length 232 [2021-12-15 09:45:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 7455 states and 10395 transitions. [2021-12-15 09:45:19,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7455 states and 10395 transitions. [2021-12-15 09:45:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-12-15 09:45:19,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:19,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:19,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:45:19,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:19,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:19,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1049424422, now seen corresponding path program 1 times [2021-12-15 09:45:19,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:19,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359881834] [2021-12-15 09:45:19,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:19,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 09:45:19,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:19,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359881834] [2021-12-15 09:45:19,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359881834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:19,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:19,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:45:19,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398295953] [2021-12-15 09:45:19,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:19,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:19,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:19,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:19,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:19,989 INFO L87 Difference]: Start difference. First operand 7455 states and 10395 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:22,693 INFO L93 Difference]: Finished difference Result 20420 states and 29108 transitions. [2021-12-15 09:45:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:22,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 246 [2021-12-15 09:45:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:22,730 INFO L225 Difference]: With dead ends: 20420 [2021-12-15 09:45:22,730 INFO L226 Difference]: Without dead ends: 13754 [2021-12-15 09:45:22,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:22,742 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 886 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 870 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 3178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 870 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:22,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 988 Invalid, 3178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [870 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:45:22,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-12-15 09:45:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 12964. [2021-12-15 09:45:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2915991668595233) internal successors, (16743), 12963 states have internal predecessors, (16743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16743 transitions. [2021-12-15 09:45:23,003 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16743 transitions. Word has length 246 [2021-12-15 09:45:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:23,004 INFO L470 AbstractCegarLoop]: Abstraction has 12964 states and 16743 transitions. [2021-12-15 09:45:23,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:23,004 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16743 transitions. [2021-12-15 09:45:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-12-15 09:45:23,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:23,009 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:23,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:45:23,009 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:23,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1732890387, now seen corresponding path program 1 times [2021-12-15 09:45:23,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047793071] [2021-12-15 09:45:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:23,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:45:23,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:23,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047793071] [2021-12-15 09:45:23,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047793071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:23,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:23,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:23,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043119149] [2021-12-15 09:45:23,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:23,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:23,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:23,128 INFO L87 Difference]: Start difference. First operand 12964 states and 16743 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:26,017 INFO L93 Difference]: Finished difference Result 36960 states and 48179 transitions. [2021-12-15 09:45:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 264 [2021-12-15 09:45:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:26,070 INFO L225 Difference]: With dead ends: 36960 [2021-12-15 09:45:26,070 INFO L226 Difference]: Without dead ends: 24785 [2021-12-15 09:45:26,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:26,090 INFO L933 BasicCegarLoop]: 791 mSDtfsCounter, 859 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:26,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [859 Valid, 907 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24785 states. [2021-12-15 09:45:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24785 to 24775. [2021-12-15 09:45:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24775 states, 24774 states have (on average 1.2223298619520464) internal successors, (30282), 24774 states have internal predecessors, (30282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:26,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24775 states to 24775 states and 30282 transitions. [2021-12-15 09:45:26,390 INFO L78 Accepts]: Start accepts. Automaton has 24775 states and 30282 transitions. Word has length 264 [2021-12-15 09:45:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:26,391 INFO L470 AbstractCegarLoop]: Abstraction has 24775 states and 30282 transitions. [2021-12-15 09:45:26,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:26,391 INFO L276 IsEmpty]: Start isEmpty. Operand 24775 states and 30282 transitions. [2021-12-15 09:45:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-15 09:45:26,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:26,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:26,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:45:26,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:26,399 INFO L85 PathProgramCache]: Analyzing trace with hash -665300276, now seen corresponding path program 1 times [2021-12-15 09:45:26,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:26,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687267555] [2021-12-15 09:45:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:26,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:45:26,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:26,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687267555] [2021-12-15 09:45:26,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687267555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:26,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:26,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:26,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990766721] [2021-12-15 09:45:26,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:26,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:45:26,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:26,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:45:26,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:26,512 INFO L87 Difference]: Start difference. First operand 24775 states and 30282 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:32,354 INFO L93 Difference]: Finished difference Result 74157 states and 91574 transitions. [2021-12-15 09:45:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:45:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 333 [2021-12-15 09:45:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:32,433 INFO L225 Difference]: With dead ends: 74157 [2021-12-15 09:45:32,433 INFO L226 Difference]: Without dead ends: 50171 [2021-12-15 09:45:32,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:45:32,466 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 1747 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 6069 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1747 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 7253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 6069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:32,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1747 Valid, 699 Invalid, 7253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 6069 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 09:45:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50171 states. [2021-12-15 09:45:33,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50171 to 50049. [2021-12-15 09:45:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 1.203065057544757) internal successors, (60211), 50048 states have internal predecessors, (60211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 60211 transitions. [2021-12-15 09:45:33,154 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 60211 transitions. Word has length 333 [2021-12-15 09:45:33,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:33,154 INFO L470 AbstractCegarLoop]: Abstraction has 50049 states and 60211 transitions. [2021-12-15 09:45:33,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 60211 transitions. [2021-12-15 09:45:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2021-12-15 09:45:33,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:33,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:33,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:45:33,160 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash 652260614, now seen corresponding path program 1 times [2021-12-15 09:45:33,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:33,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828678132] [2021-12-15 09:45:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:33,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 361 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:45:33,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:33,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828678132] [2021-12-15 09:45:33,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828678132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:33,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:33,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:33,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521177549] [2021-12-15 09:45:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:33,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:33,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:33,261 INFO L87 Difference]: Start difference. First operand 50049 states and 60211 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:36,329 INFO L93 Difference]: Finished difference Result 121384 states and 144666 transitions. [2021-12-15 09:45:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 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 348 [2021-12-15 09:45:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:36,424 INFO L225 Difference]: With dead ends: 121384 [2021-12-15 09:45:36,424 INFO L226 Difference]: Without dead ends: 72124 [2021-12-15 09:45:36,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:36,466 INFO L933 BasicCegarLoop]: 1852 mSDtfsCounter, 753 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2598 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 2908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:36,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1994 Invalid, 2908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2598 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:45:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72124 states. [2021-12-15 09:45:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72124 to 69728. [2021-12-15 09:45:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69728 states, 69727 states have (on average 1.17162648615314) internal successors, (81694), 69727 states have internal predecessors, (81694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:37,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69728 states to 69728 states and 81694 transitions. [2021-12-15 09:45:37,303 INFO L78 Accepts]: Start accepts. Automaton has 69728 states and 81694 transitions. Word has length 348 [2021-12-15 09:45:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:37,304 INFO L470 AbstractCegarLoop]: Abstraction has 69728 states and 81694 transitions. [2021-12-15 09:45:37,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 69728 states and 81694 transitions. [2021-12-15 09:45:37,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-12-15 09:45:37,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:37,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:45:37,312 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 344244786, now seen corresponding path program 1 times [2021-12-15 09:45:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524212261] [2021-12-15 09:45:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:37,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:45:37,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:37,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524212261] [2021-12-15 09:45:37,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524212261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:37,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:37,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:37,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321832901] [2021-12-15 09:45:37,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:37,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:37,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:37,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:37,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:37,557 INFO L87 Difference]: Start difference. First operand 69728 states and 81694 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:40,446 INFO L93 Difference]: Finished difference Result 142580 states and 166397 transitions. [2021-12-15 09:45:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 382 [2021-12-15 09:45:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:40,528 INFO L225 Difference]: With dead ends: 142580 [2021-12-15 09:45:40,528 INFO L226 Difference]: Without dead ends: 70488 [2021-12-15 09:45:40,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:40,559 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 1036 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 2943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:40,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 1645 Invalid, 2943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [595 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:45:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70488 states. [2021-12-15 09:45:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70488 to 65757. [2021-12-15 09:45:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65757 states, 65756 states have (on average 1.1184834843968612) internal successors, (73547), 65756 states have internal predecessors, (73547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65757 states to 65757 states and 73547 transitions. [2021-12-15 09:45:41,387 INFO L78 Accepts]: Start accepts. Automaton has 65757 states and 73547 transitions. Word has length 382 [2021-12-15 09:45:41,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:41,389 INFO L470 AbstractCegarLoop]: Abstraction has 65757 states and 73547 transitions. [2021-12-15 09:45:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 65757 states and 73547 transitions. [2021-12-15 09:45:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-12-15 09:45:41,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:41,395 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:41,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:45:41,397 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:41,397 INFO L85 PathProgramCache]: Analyzing trace with hash -169944589, now seen corresponding path program 1 times [2021-12-15 09:45:41,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933277468] [2021-12-15 09:45:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:41,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 297 proven. 110 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-15 09:45:41,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933277468] [2021-12-15 09:45:41,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933277468] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:45:41,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138116684] [2021-12-15 09:45:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:41,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:41,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:41,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:45:41,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:45:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:41,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:45:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:45:42,410 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-12-15 09:45:42,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:45:42,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138116684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:42,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:45:42,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:45:42,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874497513] [2021-12-15 09:45:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:42,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:42,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:42,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:42,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:42,412 INFO L87 Difference]: Start difference. First operand 65757 states and 73547 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:45,151 INFO L93 Difference]: Finished difference Result 130723 states and 146299 transitions. [2021-12-15 09:45:45,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 391 [2021-12-15 09:45:45,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:45,226 INFO L225 Difference]: With dead ends: 130723 [2021-12-15 09:45:45,226 INFO L226 Difference]: Without dead ends: 65755 [2021-12-15 09:45:45,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:45,256 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:45,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1113 Valid, 1421 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 09:45:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65755 states. [2021-12-15 09:45:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65755 to 65754. [2021-12-15 09:45:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65754 states, 65753 states have (on average 1.0940033154380788) internal successors, (71934), 65753 states have internal predecessors, (71934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65754 states to 65754 states and 71934 transitions. [2021-12-15 09:45:45,881 INFO L78 Accepts]: Start accepts. Automaton has 65754 states and 71934 transitions. Word has length 391 [2021-12-15 09:45:45,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:45,882 INFO L470 AbstractCegarLoop]: Abstraction has 65754 states and 71934 transitions. [2021-12-15 09:45:45,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:45,882 INFO L276 IsEmpty]: Start isEmpty. Operand 65754 states and 71934 transitions. [2021-12-15 09:45:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-15 09:45:45,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:45,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:45,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:45:46,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:46,106 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1692395044, now seen corresponding path program 1 times [2021-12-15 09:45:46,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476045159] [2021-12-15 09:45:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:46,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:45:46,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:46,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476045159] [2021-12-15 09:45:46,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476045159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:46,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:46,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:46,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923098936] [2021-12-15 09:45:46,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:46,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:46,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:46,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:46,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:46,429 INFO L87 Difference]: Start difference. First operand 65754 states and 71934 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:50,180 INFO L93 Difference]: Finished difference Result 162343 states and 178309 transitions. [2021-12-15 09:45:50,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 392 [2021-12-15 09:45:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:50,287 INFO L225 Difference]: With dead ends: 162343 [2021-12-15 09:45:50,287 INFO L226 Difference]: Without dead ends: 97378 [2021-12-15 09:45:50,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:50,329 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 960 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2996 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 3742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:50,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [960 Valid, 629 Invalid, 3742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2996 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:45:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97378 states. [2021-12-15 09:45:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97378 to 96493. [2021-12-15 09:45:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96493 states, 96492 states have (on average 1.0985470298055797) internal successors, (106001), 96492 states have internal predecessors, (106001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96493 states to 96493 states and 106001 transitions. [2021-12-15 09:45:51,307 INFO L78 Accepts]: Start accepts. Automaton has 96493 states and 106001 transitions. Word has length 392 [2021-12-15 09:45:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 96493 states and 106001 transitions. [2021-12-15 09:45:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 96493 states and 106001 transitions. [2021-12-15 09:45:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2021-12-15 09:45:51,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:51,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:51,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:45:51,317 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:51,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1281024426, now seen corresponding path program 1 times [2021-12-15 09:45:51,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:51,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971801702] [2021-12-15 09:45:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:51,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 432 proven. 110 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-15 09:45:51,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971801702] [2021-12-15 09:45:51,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971801702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:45:51,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099466050] [2021-12-15 09:45:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:51,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:45:51,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:45:51,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:45:51,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:45:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:51,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:45:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:45:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-12-15 09:45:52,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:45:52,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099466050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:52,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:45:52,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-15 09:45:52,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532312108] [2021-12-15 09:45:52,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:52,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:52,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:52,901 INFO L87 Difference]: Start difference. First operand 96493 states and 106001 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:45:55,850 INFO L93 Difference]: Finished difference Result 198508 states and 217768 transitions. [2021-12-15 09:45:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:45:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 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 459 [2021-12-15 09:45:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:45:55,965 INFO L225 Difference]: With dead ends: 198508 [2021-12-15 09:45:55,965 INFO L226 Difference]: Without dead ends: 101228 [2021-12-15 09:45:55,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:45:55,983 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 685 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:45:55,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1160 Invalid, 2610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:45:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101228 states. [2021-12-15 09:45:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101228 to 99643. [2021-12-15 09:45:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99643 states, 99642 states have (on average 1.088536962325124) internal successors, (108464), 99642 states have internal predecessors, (108464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99643 states to 99643 states and 108464 transitions. [2021-12-15 09:45:57,078 INFO L78 Accepts]: Start accepts. Automaton has 99643 states and 108464 transitions. Word has length 459 [2021-12-15 09:45:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:45:57,079 INFO L470 AbstractCegarLoop]: Abstraction has 99643 states and 108464 transitions. [2021-12-15 09:45:57,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:45:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 99643 states and 108464 transitions. [2021-12-15 09:45:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-15 09:45:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:45:57,086 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:45:57,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:45:57,293 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,SelfDestructingSolverStorable10 [2021-12-15 09:45:57,294 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:45:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:45:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1638174369, now seen corresponding path program 1 times [2021-12-15 09:45:57,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:45:57,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136162475] [2021-12-15 09:45:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:45:57,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:45:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:45:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 605 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-15 09:45:57,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:45:57,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136162475] [2021-12-15 09:45:57,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136162475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:45:57,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:45:57,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:45:57,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321625846] [2021-12-15 09:45:57,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:45:57,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:45:57,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:45:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:45:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:45:57,418 INFO L87 Difference]: Start difference. First operand 99643 states and 108464 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:46:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:46:00,808 INFO L93 Difference]: Finished difference Result 229204 states and 251493 transitions. [2021-12-15 09:46:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:46:00,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 468 [2021-12-15 09:46:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:46:00,975 INFO L225 Difference]: With dead ends: 229204 [2021-12-15 09:46:00,975 INFO L226 Difference]: Without dead ends: 130350 [2021-12-15 09:46:01,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:46:01,019 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 950 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2346 mSolverCounterSat, 927 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 927 IncrementalHoareTripleChecker+Valid, 2346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:46:01,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 709 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [927 Valid, 2346 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:46:01,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130350 states.