./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label33.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/Problem18_label33.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 41b8f78fa335f1640e7fa17c2ba64c4ba903ee291b35e4b6f69ac60caf93828b --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 10:03:39,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 10:03:39,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 10:03:39,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 10:03:39,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 10:03:39,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 10:03:39,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 10:03:39,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 10:03:39,085 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 10:03:39,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 10:03:39,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 10:03:39,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 10:03:39,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 10:03:39,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 10:03:39,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 10:03:39,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 10:03:39,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 10:03:39,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 10:03:39,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 10:03:39,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 10:03:39,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 10:03:39,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 10:03:39,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 10:03:39,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 10:03:39,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 10:03:39,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 10:03:39,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 10:03:39,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 10:03:39,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 10:03:39,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 10:03:39,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 10:03:39,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 10:03:39,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 10:03:39,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 10:03:39,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 10:03:39,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 10:03:39,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 10:03:39,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 10:03:39,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 10:03:39,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 10:03:39,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 10:03:39,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 10:03:39,154 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 10:03:39,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 10:03:39,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 10:03:39,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 10:03:39,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 10:03:39,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 10:03:39,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 10:03:39,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 10:03:39,157 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 10:03:39,158 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 10:03:39,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 10:03:39,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 10:03:39,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 10:03:39,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 10:03:39,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 10:03:39,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 10:03:39,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 10:03:39,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 10:03:39,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 10:03:39,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 10:03:39,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 10:03:39,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 10:03:39,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 10:03:39,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 10:03:39,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:03:39,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 10:03:39,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 10:03:39,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 10:03:39,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 10:03:39,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 10:03:39,163 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 10:03:39,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 10:03:39,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 10:03:39,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 10:03:39,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 41b8f78fa335f1640e7fa17c2ba64c4ba903ee291b35e4b6f69ac60caf93828b [2021-12-15 10:03:39,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 10:03:39,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 10:03:39,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 10:03:39,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 10:03:39,429 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 10:03:39,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label33.c [2021-12-15 10:03:39,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195f628cf/9966220e209042ce87b4bc80a3f74268/FLAGe89194907 [2021-12-15 10:03:40,112 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 10:03:40,113 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label33.c [2021-12-15 10:03:40,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195f628cf/9966220e209042ce87b4bc80a3f74268/FLAGe89194907 [2021-12-15 10:03:40,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195f628cf/9966220e209042ce87b4bc80a3f74268 [2021-12-15 10:03:40,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 10:03:40,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 10:03:40,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 10:03:40,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 10:03:40,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 10:03:40,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:03:40" (1/1) ... [2021-12-15 10:03:40,515 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b90fdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:40, skipping insertion in model container [2021-12-15 10:03:40,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:03:40" (1/1) ... [2021-12-15 10:03:40,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 10:03:40,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 10:03:40,794 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/Problem18_label33.c[2701,2714] [2021-12-15 10:03:41,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:03:41,338 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 10:03:41,365 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/Problem18_label33.c[2701,2714] [2021-12-15 10:03:41,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 10:03:41,776 INFO L208 MainTranslator]: Completed translation [2021-12-15 10:03:41,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41 WrapperNode [2021-12-15 10:03:41,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 10:03:41,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 10:03:41,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 10:03:41,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 10:03:41,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:41,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,069 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-12-15 10:03:42,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 10:03:42,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 10:03:42,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 10:03:42,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 10:03:42,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 10:03:42,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 10:03:42,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 10:03:42,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 10:03:42,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (1/1) ... [2021-12-15 10:03:42,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 10:03:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:03:42,497 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 10:03:42,523 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 10:03:42,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 10:03:42,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 10:03:42,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 10:03:42,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 10:03:42,601 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 10:03:42,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 10:03:45,229 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 10:03:45,242 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 10:03:45,242 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 10:03:45,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:03:45 BoogieIcfgContainer [2021-12-15 10:03:45,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 10:03:45,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 10:03:45,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 10:03:45,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 10:03:45,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:03:40" (1/3) ... [2021-12-15 10:03:45,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcbe99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:03:45, skipping insertion in model container [2021-12-15 10:03:45,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:03:41" (2/3) ... [2021-12-15 10:03:45,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fcbe99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:03:45, skipping insertion in model container [2021-12-15 10:03:45,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:03:45" (3/3) ... [2021-12-15 10:03:45,252 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label33.c [2021-12-15 10:03:45,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 10:03:45,257 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 10:03:45,300 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 10:03:45,306 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 10:03:45,307 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 10:03:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 10:03:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 10:03:45,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:45,338 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] [2021-12-15 10:03:45,339 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:45,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:45,343 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2021-12-15 10:03:45,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:45,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806723359] [2021-12-15 10:03:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:45,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:45,526 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 10:03:45,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806723359] [2021-12-15 10:03:45,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806723359] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:45,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:45,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:03:45,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84198599] [2021-12-15 10:03:45,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:45,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:03:45,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:03:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:03:45,567 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 10:03:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:48,546 INFO L93 Difference]: Finished difference Result 2221 states and 4282 transitions. [2021-12-15 10:03:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:03:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2021-12-15 10:03:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:48,578 INFO L225 Difference]: With dead ends: 2221 [2021-12-15 10:03:48,578 INFO L226 Difference]: Without dead ends: 1384 [2021-12-15 10:03:48,587 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 10:03:48,590 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 772 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2069 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:48,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 487 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2069 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 10:03:48,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-12-15 10:03:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-12-15 10:03:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.5994215473608098) internal successors, (2212), 1383 states have internal predecessors, (2212), 0 states have call successors, (0), 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 10:03:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2212 transitions. [2021-12-15 10:03:48,686 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2212 transitions. Word has length 23 [2021-12-15 10:03:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:48,686 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2212 transitions. [2021-12-15 10:03:48,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 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 10:03:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2212 transitions. [2021-12-15 10:03:48,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-15 10:03:48,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:48,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:48,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 10:03:48,690 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:48,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:48,691 INFO L85 PathProgramCache]: Analyzing trace with hash 513048738, now seen corresponding path program 1 times [2021-12-15 10:03:48,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:48,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528528448] [2021-12-15 10:03:48,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:48,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:03:48,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528528448] [2021-12-15 10:03:48,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528528448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:48,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:48,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:03:48,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900120301] [2021-12-15 10:03:48,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:48,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:03:48,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:48,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:03:48,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:03:48,833 INFO L87 Difference]: Start difference. First operand 1384 states and 2212 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:03:51,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:51,297 INFO L93 Difference]: Finished difference Result 4146 states and 6631 transitions. [2021-12-15 10:03:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:03:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 88 [2021-12-15 10:03:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:51,310 INFO L225 Difference]: With dead ends: 4146 [2021-12-15 10:03:51,311 INFO L226 Difference]: Without dead ends: 2764 [2021-12-15 10:03:51,317 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 10:03:51,319 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 714 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:51,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [714 Valid, 529 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 10:03:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-12-15 10:03:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-12-15 10:03:51,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3503438291711907) internal successors, (3731), 2763 states have internal predecessors, (3731), 0 states have call successors, (0), 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 10:03:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3731 transitions. [2021-12-15 10:03:51,424 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3731 transitions. Word has length 88 [2021-12-15 10:03:51,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:51,424 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3731 transitions. [2021-12-15 10:03:51,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:03:51,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3731 transitions. [2021-12-15 10:03:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-15 10:03:51,430 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:51,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:51,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 10:03:51,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1460390678, now seen corresponding path program 1 times [2021-12-15 10:03:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:51,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899076173] [2021-12-15 10:03:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:51,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 10:03:51,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:51,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899076173] [2021-12-15 10:03:51,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899076173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:51,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:51,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:03:51,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373074767] [2021-12-15 10:03:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:51,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:03:51,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:03:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:03:51,625 INFO L87 Difference]: Start difference. First operand 2764 states and 3731 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 10:03:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:54,814 INFO L93 Difference]: Finished difference Result 6906 states and 9074 transitions. [2021-12-15 10:03:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:03:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 206 [2021-12-15 10:03:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:54,830 INFO L225 Difference]: With dead ends: 6906 [2021-12-15 10:03:54,831 INFO L226 Difference]: Without dead ends: 4144 [2021-12-15 10:03:54,834 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 10:03:54,835 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 1873 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4084 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1873 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 4084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:54,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1873 Valid, 640 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 4084 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 10:03:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-12-15 10:03:54,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2021-12-15 10:03:54,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4144 states, 4143 states have (on average 1.246681148925899) internal successors, (5165), 4143 states have internal predecessors, (5165), 0 states have call successors, (0), 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 10:03:54,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5165 transitions. [2021-12-15 10:03:54,903 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5165 transitions. Word has length 206 [2021-12-15 10:03:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:54,904 INFO L470 AbstractCegarLoop]: Abstraction has 4144 states and 5165 transitions. [2021-12-15 10:03:54,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 10:03:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5165 transitions. [2021-12-15 10:03:54,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-15 10:03:54,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:54,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:54,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 10:03:54,909 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:54,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash 956781548, now seen corresponding path program 1 times [2021-12-15 10:03:54,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:54,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444802789] [2021-12-15 10:03:54,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:54,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 10:03:55,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:55,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444802789] [2021-12-15 10:03:55,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444802789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:55,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:55,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:03:55,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481135920] [2021-12-15 10:03:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:55,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:03:55,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:55,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:03:55,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:03:55,111 INFO L87 Difference]: Start difference. First operand 4144 states and 5165 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 10:03:57,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:03:57,348 INFO L93 Difference]: Finished difference Result 12426 states and 15490 transitions. [2021-12-15 10:03:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:03:57,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 322 [2021-12-15 10:03:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:03:57,376 INFO L225 Difference]: With dead ends: 12426 [2021-12-15 10:03:57,377 INFO L226 Difference]: Without dead ends: 8284 [2021-12-15 10:03:57,382 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 10:03:57,383 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 700 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1991 mSolverCounterSat, 991 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 991 IncrementalHoareTripleChecker+Valid, 1991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:03:57,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 148 Invalid, 2982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [991 Valid, 1991 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 10:03:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-12-15 10:03:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 7594. [2021-12-15 10:03:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7593 states have (on average 1.241274858422231) internal successors, (9425), 7593 states have internal predecessors, (9425), 0 states have call successors, (0), 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 10:03:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 9425 transitions. [2021-12-15 10:03:57,521 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 9425 transitions. Word has length 322 [2021-12-15 10:03:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:03:57,525 INFO L470 AbstractCegarLoop]: Abstraction has 7594 states and 9425 transitions. [2021-12-15 10:03:57,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 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 10:03:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 9425 transitions. [2021-12-15 10:03:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-12-15 10:03:57,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:03:57,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:03:57,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 10:03:57,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:03:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:03:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash -447261159, now seen corresponding path program 1 times [2021-12-15 10:03:57,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:03:57,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840248007] [2021-12-15 10:03:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:03:57,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:03:57,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:03:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 10:03:57,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:03:57,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840248007] [2021-12-15 10:03:57,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840248007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:03:57,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:03:57,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 10:03:57,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694103102] [2021-12-15 10:03:57,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:03:57,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:03:57,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:03:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:03:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:03:57,776 INFO L87 Difference]: Start difference. First operand 7594 states and 9425 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 2 states have internal predecessors, (324), 0 states have call successors, (0), 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 10:04:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:00,079 INFO L93 Difference]: Finished difference Result 20016 states and 25396 transitions. [2021-12-15 10:04:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 2 states have internal predecessors, (324), 0 states have call successors, (0), 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 407 [2021-12-15 10:04:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:00,118 INFO L225 Difference]: With dead ends: 20016 [2021-12-15 10:04:00,118 INFO L226 Difference]: Without dead ends: 12424 [2021-12-15 10:04:00,127 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 10:04:00,128 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 397 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:00,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 598 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2222 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 10:04:00,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2021-12-15 10:04:00,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 12424. [2021-12-15 10:04:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12424 states, 12423 states have (on average 1.1904531916606296) internal successors, (14789), 12423 states have internal predecessors, (14789), 0 states have call successors, (0), 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 10:04:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 14789 transitions. [2021-12-15 10:04:00,366 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 14789 transitions. Word has length 407 [2021-12-15 10:04:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:00,368 INFO L470 AbstractCegarLoop]: Abstraction has 12424 states and 14789 transitions. [2021-12-15 10:04:00,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 2 states have internal predecessors, (324), 0 states have call successors, (0), 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 10:04:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 14789 transitions. [2021-12-15 10:04:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-12-15 10:04:00,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:00,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:00,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 10:04:00,379 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 610079764, now seen corresponding path program 1 times [2021-12-15 10:04:00,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903928806] [2021-12-15 10:04:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:00,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 10:04:00,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:00,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903928806] [2021-12-15 10:04:00,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903928806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:00,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:00,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:00,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131289214] [2021-12-15 10:04:00,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:00,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:00,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:00,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:00,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:00,549 INFO L87 Difference]: Start difference. First operand 12424 states and 14789 transitions. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 10:04:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:02,821 INFO L93 Difference]: Finished difference Result 30366 states and 36838 transitions. [2021-12-15 10:04:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 408 [2021-12-15 10:04:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:02,856 INFO L225 Difference]: With dead ends: 30366 [2021-12-15 10:04:02,856 INFO L226 Difference]: Without dead ends: 17944 [2021-12-15 10:04:02,872 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 10:04:02,873 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 670 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:02,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 1312 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 10:04:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17944 states. [2021-12-15 10:04:03,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17944 to 17944. [2021-12-15 10:04:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 17943 states have (on average 1.1546006799308923) internal successors, (20717), 17943 states have internal predecessors, (20717), 0 states have call successors, (0), 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 10:04:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 20717 transitions. [2021-12-15 10:04:03,151 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 20717 transitions. Word has length 408 [2021-12-15 10:04:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 17944 states and 20717 transitions. [2021-12-15 10:04:03,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 10:04:03,152 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 20717 transitions. [2021-12-15 10:04:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2021-12-15 10:04:03,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:03,160 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:03,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 10:04:03,161 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1968906332, now seen corresponding path program 1 times [2021-12-15 10:04:03,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:03,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335079517] [2021-12-15 10:04:03,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:03,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 397 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-15 10:04:03,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:03,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335079517] [2021-12-15 10:04:03,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335079517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:03,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:03,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:03,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525694449] [2021-12-15 10:04:03,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:03,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 10:04:03,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 10:04:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 10:04:03,342 INFO L87 Difference]: Start difference. First operand 17944 states and 20717 transitions. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 10:04:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:05,554 INFO L93 Difference]: Finished difference Result 38699 states and 44317 transitions. [2021-12-15 10:04:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 10:04:05,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 462 [2021-12-15 10:04:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:05,587 INFO L225 Difference]: With dead ends: 38699 [2021-12-15 10:04:05,588 INFO L226 Difference]: Without dead ends: 20704 [2021-12-15 10:04:05,611 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 10:04:05,612 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 515 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 3037 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 3239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:05,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 640 Invalid, 3239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 3037 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 10:04:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2021-12-15 10:04:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20704. [2021-12-15 10:04:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20704 states, 20703 states have (on average 1.1040428923344443) internal successors, (22857), 20703 states have internal predecessors, (22857), 0 states have call successors, (0), 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 10:04:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20704 states to 20704 states and 22857 transitions. [2021-12-15 10:04:05,903 INFO L78 Accepts]: Start accepts. Automaton has 20704 states and 22857 transitions. Word has length 462 [2021-12-15 10:04:05,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:05,903 INFO L470 AbstractCegarLoop]: Abstraction has 20704 states and 22857 transitions. [2021-12-15 10:04:05,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 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 10:04:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20704 states and 22857 transitions. [2021-12-15 10:04:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2021-12-15 10:04:05,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:05,912 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:05,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 10:04:05,912 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash -867434767, now seen corresponding path program 1 times [2021-12-15 10:04:05,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:05,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093621081] [2021-12-15 10:04:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:05,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 10:04:06,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:06,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093621081] [2021-12-15 10:04:06,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093621081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:06,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:06,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:06,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073988016] [2021-12-15 10:04:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:06,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:06,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:06,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:06,158 INFO L87 Difference]: Start difference. First operand 20704 states and 22857 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 10:04:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:07,943 INFO L93 Difference]: Finished difference Result 41406 states and 45712 transitions. [2021-12-15 10:04:07,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 493 [2021-12-15 10:04:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:07,981 INFO L225 Difference]: With dead ends: 41406 [2021-12-15 10:04:07,982 INFO L226 Difference]: Without dead ends: 20704 [2021-12-15 10:04:08,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 10:04:08,008 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 774 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:08,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 780 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:04:08,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20704 states. [2021-12-15 10:04:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20704 to 20014. [2021-12-15 10:04:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20014 states, 20013 states have (on average 1.086193973916954) internal successors, (21738), 20013 states have internal predecessors, (21738), 0 states have call successors, (0), 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 10:04:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 21738 transitions. [2021-12-15 10:04:08,342 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 21738 transitions. Word has length 493 [2021-12-15 10:04:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:08,343 INFO L470 AbstractCegarLoop]: Abstraction has 20014 states and 21738 transitions. [2021-12-15 10:04:08,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 10:04:08,344 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 21738 transitions. [2021-12-15 10:04:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-12-15 10:04:08,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:08,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:08,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 10:04:08,359 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1139863289, now seen corresponding path program 1 times [2021-12-15 10:04:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:08,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886845517] [2021-12-15 10:04:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 10:04:08,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:08,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886845517] [2021-12-15 10:04:08,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886845517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:08,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:08,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:08,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571648830] [2021-12-15 10:04:08,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:08,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:08,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:08,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:08,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:08,541 INFO L87 Difference]: Start difference. First operand 20014 states and 21738 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 10:04:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:10,310 INFO L93 Difference]: Finished difference Result 48306 states and 52474 transitions. [2021-12-15 10:04:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:10,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 524 [2021-12-15 10:04:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:10,349 INFO L225 Difference]: With dead ends: 48306 [2021-12-15 10:04:10,349 INFO L226 Difference]: Without dead ends: 28294 [2021-12-15 10:04:10,368 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 10:04:10,370 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 575 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:10,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [575 Valid, 979 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:04:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28294 states. [2021-12-15 10:04:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28294 to 27604. [2021-12-15 10:04:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27604 states, 27603 states have (on average 1.0744122015722928) internal successors, (29657), 27603 states have internal predecessors, (29657), 0 states have call successors, (0), 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 10:04:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27604 states to 27604 states and 29657 transitions. [2021-12-15 10:04:10,867 INFO L78 Accepts]: Start accepts. Automaton has 27604 states and 29657 transitions. Word has length 524 [2021-12-15 10:04:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:10,868 INFO L470 AbstractCegarLoop]: Abstraction has 27604 states and 29657 transitions. [2021-12-15 10:04:10,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 10:04:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 27604 states and 29657 transitions. [2021-12-15 10:04:10,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 578 [2021-12-15 10:04:10,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:10,883 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:10,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 10:04:10,883 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:10,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash -547474668, now seen corresponding path program 1 times [2021-12-15 10:04:10,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:10,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748032752] [2021-12-15 10:04:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:10,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 251 proven. 252 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-15 10:04:11,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748032752] [2021-12-15 10:04:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748032752] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:11,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892040195] [2021-12-15 10:04:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:11,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:11,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:11,127 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 10:04:11,153 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 10:04:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:11,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 334 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 10:04:12,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:12,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892040195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:12,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:12,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-15 10:04:12,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317885216] [2021-12-15 10:04:12,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:12,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:12,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:12,181 INFO L87 Difference]: Start difference. First operand 27604 states and 29657 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 10:04:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:14,056 INFO L93 Difference]: Finished difference Result 60726 states and 66202 transitions. [2021-12-15 10:04:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 577 [2021-12-15 10:04:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:14,102 INFO L225 Difference]: With dead ends: 60726 [2021-12-15 10:04:14,102 INFO L226 Difference]: Without dead ends: 33814 [2021-12-15 10:04:14,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 10:04:14,124 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 699 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:14,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 165 Invalid, 2315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33814 states. [2021-12-15 10:04:14,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33814 to 33814. [2021-12-15 10:04:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33814 states, 33813 states have (on average 1.0841096619643333) internal successors, (36657), 33813 states have internal predecessors, (36657), 0 states have call successors, (0), 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 10:04:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33814 states to 33814 states and 36657 transitions. [2021-12-15 10:04:14,624 INFO L78 Accepts]: Start accepts. Automaton has 33814 states and 36657 transitions. Word has length 577 [2021-12-15 10:04:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:14,625 INFO L470 AbstractCegarLoop]: Abstraction has 33814 states and 36657 transitions. [2021-12-15 10:04:14,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 10:04:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 33814 states and 36657 transitions. [2021-12-15 10:04:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2021-12-15 10:04:14,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:14,636 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:14,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 10:04:14,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-15 10:04:14,862 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:14,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash 856643043, now seen corresponding path program 1 times [2021-12-15 10:04:14,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:14,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780584429] [2021-12-15 10:04:14,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:14,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-12-15 10:04:15,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:15,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780584429] [2021-12-15 10:04:15,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780584429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:15,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:15,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:15,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030352733] [2021-12-15 10:04:15,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:15,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:15,151 INFO L87 Difference]: Start difference. First operand 33814 states and 36657 transitions. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 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 10:04:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:17,166 INFO L93 Difference]: Finished difference Result 75216 states and 82874 transitions. [2021-12-15 10:04:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:17,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 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 583 [2021-12-15 10:04:17,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:17,215 INFO L225 Difference]: With dead ends: 75216 [2021-12-15 10:04:17,216 INFO L226 Difference]: Without dead ends: 40024 [2021-12-15 10:04:17,240 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 10:04:17,241 INFO L933 BasicCegarLoop]: 1114 mSDtfsCounter, 604 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 2312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:17,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 1120 Invalid, 2312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 10:04:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40024 states. [2021-12-15 10:04:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40024 to 40024. [2021-12-15 10:04:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40024 states, 40023 states have (on average 1.0806286385328436) internal successors, (43250), 40023 states have internal predecessors, (43250), 0 states have call successors, (0), 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 10:04:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40024 states to 40024 states and 43250 transitions. [2021-12-15 10:04:17,730 INFO L78 Accepts]: Start accepts. Automaton has 40024 states and 43250 transitions. Word has length 583 [2021-12-15 10:04:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:17,731 INFO L470 AbstractCegarLoop]: Abstraction has 40024 states and 43250 transitions. [2021-12-15 10:04:17,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 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 10:04:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 40024 states and 43250 transitions. [2021-12-15 10:04:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2021-12-15 10:04:17,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:17,739 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:17,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 10:04:17,740 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash 670127992, now seen corresponding path program 1 times [2021-12-15 10:04:17,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:17,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075525325] [2021-12-15 10:04:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:17,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 422 proven. 32 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-15 10:04:18,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:18,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075525325] [2021-12-15 10:04:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075525325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:18,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954717841] [2021-12-15 10:04:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:18,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:18,016 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 10:04:18,024 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 10:04:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-15 10:04:18,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954717841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:18,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:18,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 10:04:18,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131327183] [2021-12-15 10:04:18,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:18,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:18,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:18,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:18,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:18,872 INFO L87 Difference]: Start difference. First operand 40024 states and 43250 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 10:04:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:20,793 INFO L93 Difference]: Finished difference Result 86946 states and 95141 transitions. [2021-12-15 10:04:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 601 [2021-12-15 10:04:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:20,842 INFO L225 Difference]: With dead ends: 86946 [2021-12-15 10:04:20,842 INFO L226 Difference]: Without dead ends: 47614 [2021-12-15 10:04:20,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:20,867 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 678 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 2404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 383 Invalid, 2404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2021-12-15 10:04:21,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 46234. [2021-12-15 10:04:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.0886596154262107) internal successors, (50332), 46233 states have internal predecessors, (50332), 0 states have call successors, (0), 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 10:04:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 50332 transitions. [2021-12-15 10:04:21,379 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 50332 transitions. Word has length 601 [2021-12-15 10:04:21,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:21,379 INFO L470 AbstractCegarLoop]: Abstraction has 46234 states and 50332 transitions. [2021-12-15 10:04:21,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 10:04:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 50332 transitions. [2021-12-15 10:04:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-12-15 10:04:21,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:21,389 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:21,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 10:04:21,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 10:04:21,612 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1952014521, now seen corresponding path program 1 times [2021-12-15 10:04:21,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:21,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427838362] [2021-12-15 10:04:21,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:21,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 434 proven. 32 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-15 10:04:21,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427838362] [2021-12-15 10:04:21,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427838362] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:21,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553791920] [2021-12-15 10:04:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:21,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:21,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:21,959 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:04:21,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 10:04:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:22,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:22,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 332 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-15 10:04:22,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553791920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:22,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:22,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 10:04:22,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193010510] [2021-12-15 10:04:22,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:22,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:22,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:22,816 INFO L87 Difference]: Start difference. First operand 46234 states and 50332 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 10:04:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:24,593 INFO L93 Difference]: Finished difference Result 91086 states and 99221 transitions. [2021-12-15 10:04:24,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 607 [2021-12-15 10:04:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:24,640 INFO L225 Difference]: With dead ends: 91086 [2021-12-15 10:04:24,640 INFO L226 Difference]: Without dead ends: 45544 [2021-12-15 10:04:24,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:24,664 INFO L933 BasicCegarLoop]: 986 mSDtfsCounter, 667 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 2118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:24,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 993 Invalid, 2118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 10:04:24,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45544 states. [2021-12-15 10:04:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45544 to 44164. [2021-12-15 10:04:25,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44164 states, 44163 states have (on average 1.0610239340624505) internal successors, (46858), 44163 states have internal predecessors, (46858), 0 states have call successors, (0), 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 10:04:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44164 states to 44164 states and 46858 transitions. [2021-12-15 10:04:25,147 INFO L78 Accepts]: Start accepts. Automaton has 44164 states and 46858 transitions. Word has length 607 [2021-12-15 10:04:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 44164 states and 46858 transitions. [2021-12-15 10:04:25,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 10:04:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 44164 states and 46858 transitions. [2021-12-15 10:04:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2021-12-15 10:04:25,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:25,156 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:04:25,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-15 10:04:25,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:25,380 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:25,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2033260545, now seen corresponding path program 1 times [2021-12-15 10:04:25,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:25,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374084218] [2021-12-15 10:04:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:25,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 436 proven. 32 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-15 10:04:25,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374084218] [2021-12-15 10:04:25,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374084218] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 10:04:25,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516348800] [2021-12-15 10:04:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:25,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 10:04:25,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 10:04:25,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 10:04:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 775 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 10:04:25,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 10:04:26,513 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2021-12-15 10:04:26,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 10:04:26,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516348800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:26,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 10:04:26,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 10:04:26,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685997366] [2021-12-15 10:04:26,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:26,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:26,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:26,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:26,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:26,516 INFO L87 Difference]: Start difference. First operand 44164 states and 46858 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 10:04:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:28,430 INFO L93 Difference]: Finished difference Result 89016 states and 94480 transitions. [2021-12-15 10:04:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 608 [2021-12-15 10:04:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:28,477 INFO L225 Difference]: With dead ends: 89016 [2021-12-15 10:04:28,478 INFO L226 Difference]: Without dead ends: 41404 [2021-12-15 10:04:28,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 608 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 10:04:28,508 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 699 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:28,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 1063 Invalid, 2229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 10:04:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41404 states. [2021-12-15 10:04:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41404 to 39334. [2021-12-15 10:04:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39334 states, 39333 states have (on average 1.0273307400910177) internal successors, (40408), 39333 states have internal predecessors, (40408), 0 states have call successors, (0), 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 10:04:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39334 states to 39334 states and 40408 transitions. [2021-12-15 10:04:28,980 INFO L78 Accepts]: Start accepts. Automaton has 39334 states and 40408 transitions. Word has length 608 [2021-12-15 10:04:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:28,980 INFO L470 AbstractCegarLoop]: Abstraction has 39334 states and 40408 transitions. [2021-12-15 10:04:28,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 10:04:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 39334 states and 40408 transitions. [2021-12-15 10:04:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2021-12-15 10:04:28,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:28,994 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:29,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 10:04:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 10:04:29,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash -468812015, now seen corresponding path program 1 times [2021-12-15 10:04:29,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304320751] [2021-12-15 10:04:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:29,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 945 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-12-15 10:04:29,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:29,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304320751] [2021-12-15 10:04:29,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304320751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:29,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:29,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:29,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344086445] [2021-12-15 10:04:29,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:29,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:29,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:29,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:29,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:29,404 INFO L87 Difference]: Start difference. First operand 39334 states and 40408 transitions. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 10:04:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 10:04:31,214 INFO L93 Difference]: Finished difference Result 89706 states and 92257 transitions. [2021-12-15 10:04:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 10:04:31,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 825 [2021-12-15 10:04:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 10:04:31,270 INFO L225 Difference]: With dead ends: 89706 [2021-12-15 10:04:31,270 INFO L226 Difference]: Without dead ends: 50374 [2021-12-15 10:04:31,292 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 10:04:31,292 INFO L933 BasicCegarLoop]: 960 mSDtfsCounter, 574 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 10:04:31,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 966 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 10:04:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50374 states. [2021-12-15 10:04:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50374 to 48304. [2021-12-15 10:04:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48304 states, 48303 states have (on average 1.0260232283709085) internal successors, (49560), 48303 states have internal predecessors, (49560), 0 states have call successors, (0), 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 10:04:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48304 states to 48304 states and 49560 transitions. [2021-12-15 10:04:31,837 INFO L78 Accepts]: Start accepts. Automaton has 48304 states and 49560 transitions. Word has length 825 [2021-12-15 10:04:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 10:04:31,837 INFO L470 AbstractCegarLoop]: Abstraction has 48304 states and 49560 transitions. [2021-12-15 10:04:31,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 10:04:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 48304 states and 49560 transitions. [2021-12-15 10:04:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2021-12-15 10:04:31,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 10:04:31,852 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 10:04:31,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 10:04:31,852 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 10:04:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 10:04:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1780822886, now seen corresponding path program 1 times [2021-12-15 10:04:31,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 10:04:31,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063684368] [2021-12-15 10:04:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 10:04:31,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 10:04:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 10:04:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1229 backedges. 865 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-12-15 10:04:32,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 10:04:32,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063684368] [2021-12-15 10:04:32,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063684368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 10:04:32,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 10:04:32,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 10:04:32,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763345069] [2021-12-15 10:04:32,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 10:04:32,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 10:04:32,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 10:04:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 10:04:32,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 10:04:32,061 INFO L87 Difference]: Start difference. First operand 48304 states and 49560 transitions. Second operand has 3 states, 3 states have (on average 208.0) internal successors, (624), 3 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)