./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label23.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label23.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 adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:43:27,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:43:27,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:43:27,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:43:27,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:43:27,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:43:27,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:43:27,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:43:27,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:43:27,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:43:27,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:43:27,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:43:27,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:43:27,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:43:27,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:43:27,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:43:27,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:43:27,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:43:27,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:43:27,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:43:27,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:43:27,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:43:27,104 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:43:27,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:43:27,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:43:27,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:43:27,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:43:27,112 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:43:27,112 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:43:27,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:43:27,113 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:43:27,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:43:27,115 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:43:27,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:43:27,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:43:27,118 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:43:27,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:43:27,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:43:27,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:43:27,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:43:27,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:43:27,121 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:43:27,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:43:27,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:43:27,151 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:43:27,151 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:43:27,152 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:43:27,152 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:43:27,152 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:43:27,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:43:27,153 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:43:27,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:43:27,154 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:43:27,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:43:27,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:43:27,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:43:27,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:43:27,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:43:27,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:43:27,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:43:27,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:43:27,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:27,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:43:27,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:43:27,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:43:27,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:43:27,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:43:27,158 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:43:27,158 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:43:27,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:43:27,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:43:27,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> adf96f71bf2a13ae5fd22bce01b9c481e5a9d21572a73a17cea58c8fcaecb44e [2021-12-15 09:43:27,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:43:27,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:43:27,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:43:27,440 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:43:27,440 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:43:27,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-12-15 09:43:27,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a864720/e61b605d727b47d684d07cb4b5c190d0/FLAG6d43d8caa [2021-12-15 09:43:28,204 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:43:28,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label23.c [2021-12-15 09:43:28,236 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a864720/e61b605d727b47d684d07cb4b5c190d0/FLAG6d43d8caa [2021-12-15 09:43:28,521 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33a864720/e61b605d727b47d684d07cb4b5c190d0 [2021-12-15 09:43:28,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:43:28,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:43:28,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:28,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:43:28,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:43:28,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:28" (1/1) ... [2021-12-15 09:43:28,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cf242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:28, skipping insertion in model container [2021-12-15 09:43:28,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:28" (1/1) ... [2021-12-15 09:43:28,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:43:28,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:43:28,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-12-15 09:43:29,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:29,889 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:43:29,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label23.c[2192,2205] [2021-12-15 09:43:30,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:30,387 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:43:30,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30 WrapperNode [2021-12-15 09:43:30,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:30,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:30,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:43:30,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:43:30,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:30,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,087 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:43:31,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:31,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:43:31,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:43:31,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:43:31,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,209 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,423 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:43:31,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:43:31,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:43:31,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:43:31,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (1/1) ... [2021-12-15 09:43:31,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:31,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:43:31,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:43:31,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:43:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:43:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:43:31,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:43:31,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:43:31,860 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:43:31,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:43:36,186 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:43:36,200 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:43:36,200 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:43:36,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:36 BoogieIcfgContainer [2021-12-15 09:43:36,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:43:36,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:43:36,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:43:36,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:43:36,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:43:28" (1/3) ... [2021-12-15 09:43:36,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:36, skipping insertion in model container [2021-12-15 09:43:36,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:30" (2/3) ... [2021-12-15 09:43:36,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:36, skipping insertion in model container [2021-12-15 09:43:36,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:36" (3/3) ... [2021-12-15 09:43:36,210 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label23.c [2021-12-15 09:43:36,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:43:36,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:43:36,259 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:43:36,264 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:43:36,265 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:43:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:36,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 09:43:36,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:36,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:36,298 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-15 09:43:36,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:36,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813061792] [2021-12-15 09:43:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:36,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:36,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:36,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813061792] [2021-12-15 09:43:36,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813061792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:36,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:36,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:36,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144519660] [2021-12-15 09:43:36,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:36,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:36,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:36,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:36,504 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:41,040 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-15 09:43:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:41,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2021-12-15 09:43:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:41,073 INFO L225 Difference]: With dead ends: 3160 [2021-12-15 09:43:41,074 INFO L226 Difference]: Without dead ends: 1983 [2021-12-15 09:43:41,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:41,091 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1090 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1090 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:41,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1090 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 09:43:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-15 09:43:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-15 09:43:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:41,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-15 09:43:41,201 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 13 [2021-12-15 09:43:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:41,201 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-15 09:43:41,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-15 09:43:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-15 09:43:41,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:41,204 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:41,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:43:41,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:41,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:41,205 INFO L85 PathProgramCache]: Analyzing trace with hash 365234242, now seen corresponding path program 1 times [2021-12-15 09:43:41,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:41,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442715343] [2021-12-15 09:43:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:41,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:41,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442715343] [2021-12-15 09:43:41,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442715343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:41,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:41,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:41,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903004859] [2021-12-15 09:43:41,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:41,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:43:41,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:43:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:43:41,417 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:47,134 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-15 09:43:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:43:47,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-15 09:43:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:47,156 INFO L225 Difference]: With dead ends: 6254 [2021-12-15 09:43:47,156 INFO L226 Difference]: Without dead ends: 4326 [2021-12-15 09:43:47,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:43:47,163 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2618 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:47,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 1036 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-15 09:43:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-15 09:43:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-15 09:43:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.529615918556224) internal successors, (6611), 4322 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6611 transitions. [2021-12-15 09:43:47,257 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6611 transitions. Word has length 78 [2021-12-15 09:43:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:47,259 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6611 transitions. [2021-12-15 09:43:47,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6611 transitions. [2021-12-15 09:43:47,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-15 09:43:47,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:47,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:47,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:43:47,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:47,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:47,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1767609185, now seen corresponding path program 1 times [2021-12-15 09:43:47,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:47,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464705999] [2021-12-15 09:43:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:47,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:47,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:47,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:47,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:47,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464705999] [2021-12-15 09:43:47,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464705999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:47,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:47,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:47,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553666779] [2021-12-15 09:43:47,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:47,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:47,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:47,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:47,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:47,386 INFO L87 Difference]: Start difference. First operand 4323 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:50,042 INFO L93 Difference]: Finished difference Result 7844 states and 12416 transitions. [2021-12-15 09:43:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-12-15 09:43:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:50,056 INFO L225 Difference]: With dead ends: 7844 [2021-12-15 09:43:50,056 INFO L226 Difference]: Without dead ends: 4310 [2021-12-15 09:43:50,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:50,062 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1119 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1119 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:50,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1119 Valid, 1675 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:43:50,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-12-15 09:43:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4307. [2021-12-15 09:43:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 1.361356247097074) internal successors, (5862), 4306 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:50,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5862 transitions. [2021-12-15 09:43:50,134 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5862 transitions. Word has length 138 [2021-12-15 09:43:50,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:50,135 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 5862 transitions. [2021-12-15 09:43:50,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5862 transitions. [2021-12-15 09:43:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-15 09:43:50,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:50,138 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:50,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:43:50,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1869637947, now seen corresponding path program 1 times [2021-12-15 09:43:50,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677510904] [2021-12-15 09:43:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:50,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 112 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:50,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:50,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677510904] [2021-12-15 09:43:50,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677510904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:50,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:50,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:50,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730903692] [2021-12-15 09:43:50,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:50,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:50,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:50,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:50,317 INFO L87 Difference]: Start difference. First operand 4307 states and 5862 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:53,392 INFO L93 Difference]: Finished difference Result 11006 states and 15563 transitions. [2021-12-15 09:43:53,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:53,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 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 201 [2021-12-15 09:43:53,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:53,419 INFO L225 Difference]: With dead ends: 11006 [2021-12-15 09:43:53,420 INFO L226 Difference]: Without dead ends: 7488 [2021-12-15 09:43:53,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:53,428 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 938 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1553 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:53,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [938 Valid, 1553 Invalid, 3452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:43:53,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-12-15 09:43:53,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 7465. [2021-12-15 09:43:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 1.3767416934619507) internal successors, (10276), 7464 states have internal predecessors, (10276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 10276 transitions. [2021-12-15 09:43:53,575 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 10276 transitions. Word has length 201 [2021-12-15 09:43:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:53,577 INFO L470 AbstractCegarLoop]: Abstraction has 7465 states and 10276 transitions. [2021-12-15 09:43:53,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 10276 transitions. [2021-12-15 09:43:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 09:43:53,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:53,580 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:53,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:43:53,581 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:53,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:53,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1059747936, now seen corresponding path program 1 times [2021-12-15 09:43:53,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:53,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381200112] [2021-12-15 09:43:53,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:53,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:53,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:53,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381200112] [2021-12-15 09:43:53,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381200112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:53,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:53,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:53,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932816365] [2021-12-15 09:43:53,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:53,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:53,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:53,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:53,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:53,735 INFO L87 Difference]: Start difference. First operand 7465 states and 10276 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:56,740 INFO L93 Difference]: Finished difference Result 17305 states and 24190 transitions. [2021-12-15 09:43:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 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 203 [2021-12-15 09:43:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:56,776 INFO L225 Difference]: With dead ends: 17305 [2021-12-15 09:43:56,777 INFO L226 Difference]: Without dead ends: 10629 [2021-12-15 09:43:56,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:56,785 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 864 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 2373 mSolverCounterSat, 868 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 868 IncrementalHoareTripleChecker+Valid, 2373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:56,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 885 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [868 Valid, 2373 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:43:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10629 states. [2021-12-15 09:43:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10629 to 10619. [2021-12-15 09:43:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10619 states, 10618 states have (on average 1.2384629873799209) internal successors, (13150), 10618 states have internal predecessors, (13150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10619 states to 10619 states and 13150 transitions. [2021-12-15 09:43:56,954 INFO L78 Accepts]: Start accepts. Automaton has 10619 states and 13150 transitions. Word has length 203 [2021-12-15 09:43:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:56,955 INFO L470 AbstractCegarLoop]: Abstraction has 10619 states and 13150 transitions. [2021-12-15 09:43:56,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 10619 states and 13150 transitions. [2021-12-15 09:43:56,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-15 09:43:56,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:56,961 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:56,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:43:56,961 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash 19534636, now seen corresponding path program 1 times [2021-12-15 09:43:56,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:56,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721665419] [2021-12-15 09:43:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:56,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:43:57,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721665419] [2021-12-15 09:43:57,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721665419] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:57,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:57,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:57,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41792503] [2021-12-15 09:43:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:57,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:57,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:57,073 INFO L87 Difference]: Start difference. First operand 10619 states and 13150 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:00,067 INFO L93 Difference]: Finished difference Result 29890 states and 37366 transitions. [2021-12-15 09:44:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:00,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 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 203 [2021-12-15 09:44:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:00,107 INFO L225 Difference]: With dead ends: 29890 [2021-12-15 09:44:00,107 INFO L226 Difference]: Without dead ends: 20060 [2021-12-15 09:44:00,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:00,123 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 828 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 865 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 3206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 865 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:00,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 1025 Invalid, 3206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [865 Valid, 2341 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20060 states. [2021-12-15 09:44:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20060 to 20058. [2021-12-15 09:44:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20058 states, 20057 states have (on average 1.1697661664256869) internal successors, (23462), 20057 states have internal predecessors, (23462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20058 states to 20058 states and 23462 transitions. [2021-12-15 09:44:00,393 INFO L78 Accepts]: Start accepts. Automaton has 20058 states and 23462 transitions. Word has length 203 [2021-12-15 09:44:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:00,394 INFO L470 AbstractCegarLoop]: Abstraction has 20058 states and 23462 transitions. [2021-12-15 09:44:00,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 20058 states and 23462 transitions. [2021-12-15 09:44:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-15 09:44:00,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:00,396 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:44:00,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:44:00,397 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -787216273, now seen corresponding path program 1 times [2021-12-15 09:44:00,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:00,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967177157] [2021-12-15 09:44:00,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:00,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 09:44:00,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:00,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967177157] [2021-12-15 09:44:00,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967177157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:00,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:00,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:00,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447789350] [2021-12-15 09:44:00,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:00,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:00,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:00,494 INFO L87 Difference]: Start difference. First operand 20058 states and 23462 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:03,839 INFO L93 Difference]: Finished difference Result 57447 states and 67453 transitions. [2021-12-15 09:44:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 204 [2021-12-15 09:44:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:03,915 INFO L225 Difference]: With dead ends: 57447 [2021-12-15 09:44:03,915 INFO L226 Difference]: Without dead ends: 38178 [2021-12-15 09:44:03,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:03,940 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 899 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2525 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 2525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:03,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 884 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 2525 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:44:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38178 states. [2021-12-15 09:44:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38178 to 35019. [2021-12-15 09:44:04,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35019 states, 35018 states have (on average 1.1345022559826374) internal successors, (39728), 35018 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35019 states to 35019 states and 39728 transitions. [2021-12-15 09:44:04,410 INFO L78 Accepts]: Start accepts. Automaton has 35019 states and 39728 transitions. Word has length 204 [2021-12-15 09:44:04,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:04,410 INFO L470 AbstractCegarLoop]: Abstraction has 35019 states and 39728 transitions. [2021-12-15 09:44:04,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 35019 states and 39728 transitions. [2021-12-15 09:44:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-15 09:44:04,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:04,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:04,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:44:04,414 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:04,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:04,415 INFO L85 PathProgramCache]: Analyzing trace with hash -50499454, now seen corresponding path program 1 times [2021-12-15 09:44:04,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:04,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959747285] [2021-12-15 09:44:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:04,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 116 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:04,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:04,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959747285] [2021-12-15 09:44:04,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959747285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:04,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:04,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:04,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879990566] [2021-12-15 09:44:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:04,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:04,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:04,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:04,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:04,522 INFO L87 Difference]: Start difference. First operand 35019 states and 39728 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:07,554 INFO L93 Difference]: Finished difference Result 70854 states and 80294 transitions. [2021-12-15 09:44:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-15 09:44:07,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:07,603 INFO L225 Difference]: With dead ends: 70854 [2021-12-15 09:44:07,603 INFO L226 Difference]: Without dead ends: 35045 [2021-12-15 09:44:07,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:07,635 INFO L933 BasicCegarLoop]: 1742 mSDtfsCounter, 761 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2530 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:07,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 1879 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2530 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35045 states. [2021-12-15 09:44:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35045 to 35015. [2021-12-15 09:44:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35015 states, 35014 states have (on average 1.1282915405266465) internal successors, (39506), 35014 states have internal predecessors, (39506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35015 states to 35015 states and 39506 transitions. [2021-12-15 09:44:08,007 INFO L78 Accepts]: Start accepts. Automaton has 35015 states and 39506 transitions. Word has length 225 [2021-12-15 09:44:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:08,008 INFO L470 AbstractCegarLoop]: Abstraction has 35015 states and 39506 transitions. [2021-12-15 09:44:08,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 35015 states and 39506 transitions. [2021-12-15 09:44:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-12-15 09:44:08,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:08,011 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:44:08,012 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1350158918, now seen corresponding path program 1 times [2021-12-15 09:44:08,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:08,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289720441] [2021-12-15 09:44:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:08,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:44:08,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289720441] [2021-12-15 09:44:08,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289720441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:08,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:08,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:08,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772222195] [2021-12-15 09:44:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:08,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:08,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:08,139 INFO L87 Difference]: Start difference. First operand 35015 states and 39506 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:11,012 INFO L93 Difference]: Finished difference Result 69239 states and 78217 transitions. [2021-12-15 09:44:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:11,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 254 [2021-12-15 09:44:11,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:11,068 INFO L225 Difference]: With dead ends: 69239 [2021-12-15 09:44:11,069 INFO L226 Difference]: Without dead ends: 35013 [2021-12-15 09:44:11,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:11,094 INFO L933 BasicCegarLoop]: 1339 mSDtfsCounter, 1187 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:11,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1419 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 09:44:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35013 states. [2021-12-15 09:44:11,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35013 to 35012. [2021-12-15 09:44:11,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35012 states, 35011 states have (on average 1.101053954471452) internal successors, (38549), 35011 states have internal predecessors, (38549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35012 states to 35012 states and 38549 transitions. [2021-12-15 09:44:11,587 INFO L78 Accepts]: Start accepts. Automaton has 35012 states and 38549 transitions. Word has length 254 [2021-12-15 09:44:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 35012 states and 38549 transitions. [2021-12-15 09:44:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 35012 states and 38549 transitions. [2021-12-15 09:44:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-12-15 09:44:11,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:11,596 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:11,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:44:11,596 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:11,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash 448094546, now seen corresponding path program 1 times [2021-12-15 09:44:11,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:11,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270779025] [2021-12-15 09:44:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:11,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 412 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-12-15 09:44:11,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:11,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270779025] [2021-12-15 09:44:11,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270779025] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:11,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:11,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:11,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438171156] [2021-12-15 09:44:11,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:11,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:11,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:11,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:11,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:11,725 INFO L87 Difference]: Start difference. First operand 35012 states and 38549 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:17,739 INFO L93 Difference]: Finished difference Result 104853 states and 115892 transitions. [2021-12-15 09:44:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 361 [2021-12-15 09:44:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:17,855 INFO L225 Difference]: With dead ends: 104853 [2021-12-15 09:44:17,855 INFO L226 Difference]: Without dead ends: 70630 [2021-12-15 09:44:17,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:17,886 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 1703 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 1032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1703 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 7061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1032 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:17,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1703 Valid, 848 Invalid, 7061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1032 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-15 09:44:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70630 states. [2021-12-15 09:44:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70630 to 48406. [2021-12-15 09:44:18,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48406 states, 48405 states have (on average 1.0905071790104328) internal successors, (52786), 48405 states have internal predecessors, (52786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48406 states to 48406 states and 52786 transitions. [2021-12-15 09:44:18,440 INFO L78 Accepts]: Start accepts. Automaton has 48406 states and 52786 transitions. Word has length 361 [2021-12-15 09:44:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:18,440 INFO L470 AbstractCegarLoop]: Abstraction has 48406 states and 52786 transitions. [2021-12-15 09:44:18,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 48406 states and 52786 transitions. [2021-12-15 09:44:18,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-12-15 09:44:18,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:18,448 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:44:18,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:44:18,449 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash 976006743, now seen corresponding path program 1 times [2021-12-15 09:44:18,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:18,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840361388] [2021-12-15 09:44:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:18,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 09:44:18,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:18,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840361388] [2021-12-15 09:44:18,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840361388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:18,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:18,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:18,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153088338] [2021-12-15 09:44:18,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:18,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:18,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:18,600 INFO L87 Difference]: Start difference. First operand 48406 states and 52786 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:22,135 INFO L93 Difference]: Finished difference Result 112562 states and 123572 transitions. [2021-12-15 09:44:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 374 [2021-12-15 09:44:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:22,241 INFO L225 Difference]: With dead ends: 112562 [2021-12-15 09:44:22,242 INFO L226 Difference]: Without dead ends: 64945 [2021-12-15 09:44:22,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:22,273 INFO L933 BasicCegarLoop]: 720 mSDtfsCounter, 837 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 899 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 899 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:22,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 800 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [899 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-15 09:44:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64945 states.