./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label19.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/Problem03_label19.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 dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:04:12,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:04:12,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:04:12,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:04:12,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:04:12,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:04:12,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:04:12,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:04:12,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:04:12,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:04:12,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:04:12,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:04:12,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:04:12,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:04:12,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:04:12,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:04:12,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:04:12,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:04:12,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:04:12,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:04:12,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:04:12,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:04:12,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:04:12,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:04:12,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:04:12,072 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:04:12,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:04:12,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:04:12,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:04:12,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:04:12,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:04:12,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:04:12,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:04:12,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:04:12,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:04:12,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:04:12,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:04:12,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:04:12,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:04:12,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:04:12,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:04:12,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:04:12,106 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:04:12,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:04:12,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:04:12,106 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:04:12,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:04:12,107 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:04:12,107 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:04:12,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:04:12,108 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:04:12,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:04:12,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:04:12,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:04:12,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:04:12,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:04:12,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:12,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:04:12,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:04:12,111 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:04:12,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:04:12,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:04:12,111 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbab4b57592d1cd844f46032ce61618d4e076adc5adb242b34e740348fe0a295 [2021-12-15 09:04:12,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:04:12,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:04:12,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:04:12,288 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:04:12,289 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:04:12,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2021-12-15 09:04:12,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70abed984/36e667e530ff45148bf0417e22d742c5/FLAG7ce467fd8 [2021-12-15 09:04:12,848 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:04:12,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label19.c [2021-12-15 09:04:12,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70abed984/36e667e530ff45148bf0417e22d742c5/FLAG7ce467fd8 [2021-12-15 09:04:13,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70abed984/36e667e530ff45148bf0417e22d742c5 [2021-12-15 09:04:13,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:04:13,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:04:13,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:13,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:04:13,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:04:13,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:13" (1/1) ... [2021-12-15 09:04:13,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1121244f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:13, skipping insertion in model container [2021-12-15 09:04:13,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:04:13" (1/1) ... [2021-12-15 09:04:13,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:04:13,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:04:13,901 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/Problem03_label19.c[59475,59488] [2021-12-15 09:04:13,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:13,945 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:04:14,088 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/Problem03_label19.c[59475,59488] [2021-12-15 09:04:14,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:04:14,108 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:04:14,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14 WrapperNode [2021-12-15 09:04:14,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:04:14,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:14,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:04:14,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:04:14,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,215 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:04:14,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:04:14,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:04:14,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:04:14,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:04:14,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:04:14,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:04:14,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:04:14,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:04:14,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (1/1) ... [2021-12-15 09:04:14,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:04:14,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:14,399 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 09:04:14,417 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 09:04:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:04:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:04:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:04:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:04:14,498 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:04:14,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:04:15,627 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:04:15,638 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:04:15,639 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:04:15,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:15 BoogieIcfgContainer [2021-12-15 09:04:15,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:04:15,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:04:15,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:04:15,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:04:15,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:04:13" (1/3) ... [2021-12-15 09:04:15,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1263d4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:15, skipping insertion in model container [2021-12-15 09:04:15,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:04:14" (2/3) ... [2021-12-15 09:04:15,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1263d4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:04:15, skipping insertion in model container [2021-12-15 09:04:15,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:04:15" (3/3) ... [2021-12-15 09:04:15,647 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label19.c [2021-12-15 09:04:15,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:04:15,651 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:04:15,691 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:04:15,698 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 09:04:15,698 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:04:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 09:04:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-15 09:04:15,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:15,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:15,748 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1077687485, now seen corresponding path program 1 times [2021-12-15 09:04:15,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:15,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375714777] [2021-12-15 09:04:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:15,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:16,149 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 09:04:16,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:16,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375714777] [2021-12-15 09:04:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375714777] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:16,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625735390] [2021-12-15 09:04:16,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:16,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:16,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:16,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:16,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:16,179 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 09:04:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:17,130 INFO L93 Difference]: Finished difference Result 857 states and 1498 transitions. [2021-12-15 09:04:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 187 [2021-12-15 09:04:17,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:17,164 INFO L225 Difference]: With dead ends: 857 [2021-12-15 09:04:17,164 INFO L226 Difference]: Without dead ends: 462 [2021-12-15 09:04:17,171 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 09:04:17,174 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 101 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:17,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 187 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 09:04:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-15 09:04:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2021-12-15 09:04:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 1.5381263616557734) internal successors, (706), 459 states have internal predecessors, (706), 0 states have call successors, (0), 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 09:04:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 706 transitions. [2021-12-15 09:04:17,222 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 706 transitions. Word has length 187 [2021-12-15 09:04:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:17,223 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 706 transitions. [2021-12-15 09:04:17,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 09:04:17,224 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 706 transitions. [2021-12-15 09:04:17,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-15 09:04:17,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:17,230 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:17,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:04:17,237 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 365635140, now seen corresponding path program 1 times [2021-12-15 09:04:17,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027475428] [2021-12-15 09:04:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:17,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:17,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:17,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027475428] [2021-12-15 09:04:17,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027475428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:17,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:17,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:17,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968298015] [2021-12-15 09:04:17,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:17,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:17,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:17,297 INFO L87 Difference]: Start difference. First operand 460 states and 706 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 09:04:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:17,994 INFO L93 Difference]: Finished difference Result 1344 states and 2079 transitions. [2021-12-15 09:04:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:17,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 195 [2021-12-15 09:04:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:17,998 INFO L225 Difference]: With dead ends: 1344 [2021-12-15 09:04:17,999 INFO L226 Difference]: Without dead ends: 886 [2021-12-15 09:04:18,000 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 09:04:18,001 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:18,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:04:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-15 09:04:18,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 870. [2021-12-15 09:04:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 1.5132336018411967) internal successors, (1315), 869 states have internal predecessors, (1315), 0 states have call successors, (0), 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 09:04:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1315 transitions. [2021-12-15 09:04:18,030 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1315 transitions. Word has length 195 [2021-12-15 09:04:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:18,030 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1315 transitions. [2021-12-15 09:04:18,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 09:04:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1315 transitions. [2021-12-15 09:04:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-15 09:04:18,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:18,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:18,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:04:18,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:18,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:18,036 INFO L85 PathProgramCache]: Analyzing trace with hash 750887865, now seen corresponding path program 1 times [2021-12-15 09:04:18,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506484510] [2021-12-15 09:04:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:18,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:18,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506484510] [2021-12-15 09:04:18,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506484510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:18,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:18,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:18,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472824977] [2021-12-15 09:04:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:18,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:18,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:18,286 INFO L87 Difference]: Start difference. First operand 870 states and 1315 transitions. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 09:04:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:18,991 INFO L93 Difference]: Finished difference Result 1884 states and 2886 transitions. [2021-12-15 09:04:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 202 [2021-12-15 09:04:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:18,995 INFO L225 Difference]: With dead ends: 1884 [2021-12-15 09:04:18,995 INFO L226 Difference]: Without dead ends: 842 [2021-12-15 09:04:18,996 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 09:04:18,997 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 331 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:18,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 47 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:04:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-15 09:04:19,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 842. [2021-12-15 09:04:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.3650416171224733) internal successors, (1148), 841 states have internal predecessors, (1148), 0 states have call successors, (0), 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 09:04:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1148 transitions. [2021-12-15 09:04:19,010 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1148 transitions. Word has length 202 [2021-12-15 09:04:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1148 transitions. [2021-12-15 09:04:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 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 09:04:19,011 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1148 transitions. [2021-12-15 09:04:19,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-15 09:04:19,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:19,013 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:04:19,013 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2085657216, now seen corresponding path program 1 times [2021-12-15 09:04:19,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:19,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338003274] [2021-12-15 09:04:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:19,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:19,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:19,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338003274] [2021-12-15 09:04:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338003274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:19,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:19,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:19,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106267576] [2021-12-15 09:04:19,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:19,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:19,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:19,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:19,118 INFO L87 Difference]: Start difference. First operand 842 states and 1148 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:19,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:19,589 INFO L93 Difference]: Finished difference Result 2507 states and 3424 transitions. [2021-12-15 09:04:19,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:19,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 210 [2021-12-15 09:04:19,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:19,594 INFO L225 Difference]: With dead ends: 2507 [2021-12-15 09:04:19,594 INFO L226 Difference]: Without dead ends: 1667 [2021-12-15 09:04:19,595 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 09:04:19,596 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 230 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:19,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 49 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-12-15 09:04:19,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1658. [2021-12-15 09:04:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 1.3566686783343391) internal successors, (2248), 1657 states have internal predecessors, (2248), 0 states have call successors, (0), 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 09:04:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2248 transitions. [2021-12-15 09:04:19,620 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2248 transitions. Word has length 210 [2021-12-15 09:04:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:19,620 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 2248 transitions. [2021-12-15 09:04:19,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2248 transitions. [2021-12-15 09:04:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-15 09:04:19,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:19,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:19,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:04:19,624 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1810228712, now seen corresponding path program 1 times [2021-12-15 09:04:19,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:19,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73926306] [2021-12-15 09:04:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:19,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:19,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:19,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73926306] [2021-12-15 09:04:19,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73926306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:19,668 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:19,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:19,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108920972] [2021-12-15 09:04:19,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:19,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:19,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:19,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:19,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:19,670 INFO L87 Difference]: Start difference. First operand 1658 states and 2248 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 09:04:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:20,161 INFO L93 Difference]: Finished difference Result 4954 states and 6724 transitions. [2021-12-15 09:04:20,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:20,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 213 [2021-12-15 09:04:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:20,172 INFO L225 Difference]: With dead ends: 4954 [2021-12-15 09:04:20,172 INFO L226 Difference]: Without dead ends: 3298 [2021-12-15 09:04:20,175 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 09:04:20,176 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 204 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:20,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 107 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2021-12-15 09:04:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 3286. [2021-12-15 09:04:20,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 3285 states have (on average 1.3546423135464232) internal successors, (4450), 3285 states have internal predecessors, (4450), 0 states have call successors, (0), 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 09:04:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4450 transitions. [2021-12-15 09:04:20,235 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4450 transitions. Word has length 213 [2021-12-15 09:04:20,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:20,235 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4450 transitions. [2021-12-15 09:04:20,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 09:04:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4450 transitions. [2021-12-15 09:04:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-15 09:04:20,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:20,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:20,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:04:20,242 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2117214179, now seen corresponding path program 1 times [2021-12-15 09:04:20,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:20,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627600039] [2021-12-15 09:04:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:20,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:20,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627600039] [2021-12-15 09:04:20,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627600039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:20,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:20,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:20,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010257898] [2021-12-15 09:04:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:20,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:20,321 INFO L87 Difference]: Start difference. First operand 3286 states and 4450 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 09:04:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:20,870 INFO L93 Difference]: Finished difference Result 9017 states and 12220 transitions. [2021-12-15 09:04:20,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:20,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2021-12-15 09:04:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:20,890 INFO L225 Difference]: With dead ends: 9017 [2021-12-15 09:04:20,891 INFO L226 Difference]: Without dead ends: 5733 [2021-12-15 09:04:20,896 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 09:04:20,897 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 197 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:20,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 87 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-12-15 09:04:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 5727. [2021-12-15 09:04:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5727 states, 5726 states have (on average 1.2940971009430666) internal successors, (7410), 5726 states have internal predecessors, (7410), 0 states have call successors, (0), 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 09:04:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5727 states to 5727 states and 7410 transitions. [2021-12-15 09:04:21,008 INFO L78 Accepts]: Start accepts. Automaton has 5727 states and 7410 transitions. Word has length 215 [2021-12-15 09:04:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:21,008 INFO L470 AbstractCegarLoop]: Abstraction has 5727 states and 7410 transitions. [2021-12-15 09:04:21,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 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 09:04:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5727 states and 7410 transitions. [2021-12-15 09:04:21,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-15 09:04:21,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:21,015 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:21,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:04:21,016 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash -849827512, now seen corresponding path program 1 times [2021-12-15 09:04:21,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:21,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318520639] [2021-12-15 09:04:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:21,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:21,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:21,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318520639] [2021-12-15 09:04:21,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318520639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:21,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:21,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:21,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118460231] [2021-12-15 09:04:21,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:21,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:21,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:21,070 INFO L87 Difference]: Start difference. First operand 5727 states and 7410 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 09:04:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:21,958 INFO L93 Difference]: Finished difference Result 13087 states and 16949 transitions. [2021-12-15 09:04:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 224 [2021-12-15 09:04:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:21,978 INFO L225 Difference]: With dead ends: 13087 [2021-12-15 09:04:21,979 INFO L226 Difference]: Without dead ends: 7768 [2021-12-15 09:04:21,984 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 09:04:21,985 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 414 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:21,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 74 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:04:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2021-12-15 09:04:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7760. [2021-12-15 09:04:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7760 states, 7759 states have (on average 1.2544142286377111) internal successors, (9733), 7759 states have internal predecessors, (9733), 0 states have call successors, (0), 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 09:04:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7760 states to 7760 states and 9733 transitions. [2021-12-15 09:04:22,109 INFO L78 Accepts]: Start accepts. Automaton has 7760 states and 9733 transitions. Word has length 224 [2021-12-15 09:04:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:22,109 INFO L470 AbstractCegarLoop]: Abstraction has 7760 states and 9733 transitions. [2021-12-15 09:04:22,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 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 09:04:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 7760 states and 9733 transitions. [2021-12-15 09:04:22,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-15 09:04:22,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:22,119 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:22,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:04:22,120 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:22,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:22,120 INFO L85 PathProgramCache]: Analyzing trace with hash 14269427, now seen corresponding path program 1 times [2021-12-15 09:04:22,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:22,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925376238] [2021-12-15 09:04:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:22,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:04:22,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925376238] [2021-12-15 09:04:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925376238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:22,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491859226] [2021-12-15 09:04:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:22,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:22,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:22,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:04:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:22,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:22,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:22,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491859226] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:22,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:22,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:22,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028062227] [2021-12-15 09:04:22,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:22,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:22,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:22,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:22,692 INFO L87 Difference]: Start difference. First operand 7760 states and 9733 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 09:04:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:23,256 INFO L93 Difference]: Finished difference Result 18770 states and 23647 transitions. [2021-12-15 09:04:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 231 [2021-12-15 09:04:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:23,284 INFO L225 Difference]: With dead ends: 18770 [2021-12-15 09:04:23,284 INFO L226 Difference]: Without dead ends: 12027 [2021-12-15 09:04:23,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:23,294 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:23,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 344 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12027 states. [2021-12-15 09:04:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12027 to 11008. [2021-12-15 09:04:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11008 states, 11007 states have (on average 1.188062142273099) internal successors, (13077), 11007 states have internal predecessors, (13077), 0 states have call successors, (0), 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 09:04:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11008 states to 11008 states and 13077 transitions. [2021-12-15 09:04:23,431 INFO L78 Accepts]: Start accepts. Automaton has 11008 states and 13077 transitions. Word has length 231 [2021-12-15 09:04:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:23,431 INFO L470 AbstractCegarLoop]: Abstraction has 11008 states and 13077 transitions. [2021-12-15 09:04:23,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 09:04:23,431 INFO L276 IsEmpty]: Start isEmpty. Operand 11008 states and 13077 transitions. [2021-12-15 09:04:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-15 09:04:23,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:23,444 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:23,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:23,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:23,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:23,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1550240888, now seen corresponding path program 1 times [2021-12-15 09:04:23,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:23,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947567842] [2021-12-15 09:04:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:23,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:04:23,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:23,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947567842] [2021-12-15 09:04:23,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947567842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:23,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:23,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:23,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622131371] [2021-12-15 09:04:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:23,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:23,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:23,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:23,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:23,747 INFO L87 Difference]: Start difference. First operand 11008 states and 13077 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 09:04:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:24,348 INFO L93 Difference]: Finished difference Result 24876 states and 29477 transitions. [2021-12-15 09:04:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:24,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 234 [2021-12-15 09:04:24,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:24,376 INFO L225 Difference]: With dead ends: 24876 [2021-12-15 09:04:24,377 INFO L226 Difference]: Without dead ends: 15291 [2021-12-15 09:04:24,390 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 09:04:24,391 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 186 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:24,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 90 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-12-15 09:04:24,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 15286. [2021-12-15 09:04:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 1.1776251226692835) internal successors, (18000), 15285 states have internal predecessors, (18000), 0 states have call successors, (0), 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 09:04:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 18000 transitions. [2021-12-15 09:04:24,598 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 18000 transitions. Word has length 234 [2021-12-15 09:04:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:24,599 INFO L470 AbstractCegarLoop]: Abstraction has 15286 states and 18000 transitions. [2021-12-15 09:04:24,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 2 states have internal predecessors, (231), 0 states have call successors, (0), 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 09:04:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 18000 transitions. [2021-12-15 09:04:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-12-15 09:04:24,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:24,616 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:24,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:04:24,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1288754061, now seen corresponding path program 1 times [2021-12-15 09:04:24,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:24,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852757602] [2021-12-15 09:04:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:24,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:04:24,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:24,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852757602] [2021-12-15 09:04:24,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852757602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:24,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:24,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:24,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317209492] [2021-12-15 09:04:24,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:24,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:24,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:24,680 INFO L87 Difference]: Start difference. First operand 15286 states and 18000 transitions. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 09:04:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:25,311 INFO L93 Difference]: Finished difference Result 34224 states and 40874 transitions. [2021-12-15 09:04:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:25,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 241 [2021-12-15 09:04:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:25,341 INFO L225 Difference]: With dead ends: 34224 [2021-12-15 09:04:25,341 INFO L226 Difference]: Without dead ends: 20361 [2021-12-15 09:04:25,353 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 09:04:25,354 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 212 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:25,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 126 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20361 states. [2021-12-15 09:04:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20361 to 20361. [2021-12-15 09:04:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20361 states, 20360 states have (on average 1.1347249508840864) internal successors, (23103), 20360 states have internal predecessors, (23103), 0 states have call successors, (0), 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 09:04:25,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20361 states to 20361 states and 23103 transitions. [2021-12-15 09:04:25,582 INFO L78 Accepts]: Start accepts. Automaton has 20361 states and 23103 transitions. Word has length 241 [2021-12-15 09:04:25,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:25,582 INFO L470 AbstractCegarLoop]: Abstraction has 20361 states and 23103 transitions. [2021-12-15 09:04:25,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 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 09:04:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 20361 states and 23103 transitions. [2021-12-15 09:04:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-12-15 09:04:25,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:25,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:25,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:04:25,600 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:25,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1785964666, now seen corresponding path program 1 times [2021-12-15 09:04:25,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:25,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128176306] [2021-12-15 09:04:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:25,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 61 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:04:25,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:25,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128176306] [2021-12-15 09:04:25,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128176306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:25,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518514180] [2021-12-15 09:04:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:25,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:25,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:25,721 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:25,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:04:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 09:04:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 09:04:26,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 09:04:26,593 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-15 09:04:26,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518514180] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 09:04:26,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 09:04:26,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2021-12-15 09:04:26,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770551908] [2021-12-15 09:04:26,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 09:04:26,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-15 09:04:26,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:26,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-15 09:04:26,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-15 09:04:26,596 INFO L87 Difference]: Start difference. First operand 20361 states and 23103 transitions. Second operand has 6 states, 6 states have (on average 78.33333333333333) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 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 09:04:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:29,303 INFO L93 Difference]: Finished difference Result 107600 states and 123621 transitions. [2021-12-15 09:04:29,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 09:04:29,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 78.33333333333333) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 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 249 [2021-12-15 09:04:29,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:29,496 INFO L225 Difference]: With dead ends: 107600 [2021-12-15 09:04:29,497 INFO L226 Difference]: Without dead ends: 88256 [2021-12-15 09:04:29,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-15 09:04:29,549 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 2293 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3399 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2293 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 3399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:29,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2293 Valid, 270 Invalid, 3855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 3399 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:04:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88256 states. [2021-12-15 09:04:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88256 to 75646. [2021-12-15 09:04:30,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75646 states, 75645 states have (on average 1.1166104831780026) internal successors, (84466), 75645 states have internal predecessors, (84466), 0 states have call successors, (0), 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 09:04:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75646 states to 75646 states and 84466 transitions. [2021-12-15 09:04:30,776 INFO L78 Accepts]: Start accepts. Automaton has 75646 states and 84466 transitions. Word has length 249 [2021-12-15 09:04:30,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:30,776 INFO L470 AbstractCegarLoop]: Abstraction has 75646 states and 84466 transitions. [2021-12-15 09:04:30,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.33333333333333) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 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 09:04:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 75646 states and 84466 transitions. [2021-12-15 09:04:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-15 09:04:30,839 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:30,840 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:30,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:31,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-15 09:04:31,056 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 372849362, now seen corresponding path program 1 times [2021-12-15 09:04:31,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:31,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718983826] [2021-12-15 09:04:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:31,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:04:31,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:31,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718983826] [2021-12-15 09:04:31,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718983826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:31,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:31,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:31,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379357855] [2021-12-15 09:04:31,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:31,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:31,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:31,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:31,207 INFO L87 Difference]: Start difference. First operand 75646 states and 84466 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 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 09:04:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:32,227 INFO L93 Difference]: Finished difference Result 161276 states and 180687 transitions. [2021-12-15 09:04:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 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 268 [2021-12-15 09:04:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:32,345 INFO L225 Difference]: With dead ends: 161276 [2021-12-15 09:04:32,345 INFO L226 Difference]: Without dead ends: 86241 [2021-12-15 09:04:32,373 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 09:04:32,374 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:32,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 144 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:32,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86241 states. [2021-12-15 09:04:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86241 to 82963. [2021-12-15 09:04:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82963 states, 82962 states have (on average 1.1248885031701261) internal successors, (93323), 82962 states have internal predecessors, (93323), 0 states have call successors, (0), 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 09:04:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82963 states to 82963 states and 93323 transitions. [2021-12-15 09:04:33,507 INFO L78 Accepts]: Start accepts. Automaton has 82963 states and 93323 transitions. Word has length 268 [2021-12-15 09:04:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:33,507 INFO L470 AbstractCegarLoop]: Abstraction has 82963 states and 93323 transitions. [2021-12-15 09:04:33,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 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 09:04:33,507 INFO L276 IsEmpty]: Start isEmpty. Operand 82963 states and 93323 transitions. [2021-12-15 09:04:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-12-15 09:04:33,543 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:33,543 INFO L514 BasicCegarLoop]: trace histogram [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, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:04:33,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash 554170887, now seen corresponding path program 1 times [2021-12-15 09:04:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:33,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484891620] [2021-12-15 09:04:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:33,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-15 09:04:33,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:33,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484891620] [2021-12-15 09:04:33,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484891620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:33,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288557187] [2021-12-15 09:04:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:33,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:33,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:33,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:33,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:04:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:33,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:04:34,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288557187] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:34,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:34,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:34,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267623402] [2021-12-15 09:04:34,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:34,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:34,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:34,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:34,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:34,250 INFO L87 Difference]: Start difference. First operand 82963 states and 93323 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 09:04:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:35,276 INFO L93 Difference]: Finished difference Result 192559 states and 216832 transitions. [2021-12-15 09:04:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:35,276 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 289 [2021-12-15 09:04:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:35,416 INFO L225 Difference]: With dead ends: 192559 [2021-12-15 09:04:35,416 INFO L226 Difference]: Without dead ends: 110614 [2021-12-15 09:04:35,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:35,446 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:35,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 157 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110614 states. [2021-12-15 09:04:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110614 to 96361. [2021-12-15 09:04:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96361 states, 96360 states have (on average 1.1201224574512245) internal successors, (107935), 96360 states have internal predecessors, (107935), 0 states have call successors, (0), 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 09:04:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96361 states to 96361 states and 107935 transitions. [2021-12-15 09:04:36,962 INFO L78 Accepts]: Start accepts. Automaton has 96361 states and 107935 transitions. Word has length 289 [2021-12-15 09:04:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:36,964 INFO L470 AbstractCegarLoop]: Abstraction has 96361 states and 107935 transitions. [2021-12-15 09:04:36,964 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 09:04:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96361 states and 107935 transitions. [2021-12-15 09:04:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-12-15 09:04:37,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:37,028 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:37,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:37,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:37,232 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:37,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:37,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1058558260, now seen corresponding path program 1 times [2021-12-15 09:04:37,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:37,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230650216] [2021-12-15 09:04:37,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:37,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-15 09:04:37,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230650216] [2021-12-15 09:04:37,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230650216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:37,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:37,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:04:37,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675325979] [2021-12-15 09:04:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:04:37,302 INFO L87 Difference]: Start difference. First operand 96361 states and 107935 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 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 09:04:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:38,317 INFO L93 Difference]: Finished difference Result 226665 states and 254243 transitions. [2021-12-15 09:04:38,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:38,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 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 307 [2021-12-15 09:04:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:38,473 INFO L225 Difference]: With dead ends: 226665 [2021-12-15 09:04:38,473 INFO L226 Difference]: Without dead ends: 130915 [2021-12-15 09:04:38,523 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 09:04:38,524 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 199 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:38,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 111 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130915 states. [2021-12-15 09:04:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130915 to 130505. [2021-12-15 09:04:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130505 states, 130504 states have (on average 1.1142340464660088) internal successors, (145412), 130504 states have internal predecessors, (145412), 0 states have call successors, (0), 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 09:04:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130505 states to 130505 states and 145412 transitions. [2021-12-15 09:04:40,374 INFO L78 Accepts]: Start accepts. Automaton has 130505 states and 145412 transitions. Word has length 307 [2021-12-15 09:04:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:40,374 INFO L470 AbstractCegarLoop]: Abstraction has 130505 states and 145412 transitions. [2021-12-15 09:04:40,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 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 09:04:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 130505 states and 145412 transitions. [2021-12-15 09:04:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-12-15 09:04:40,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:40,438 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:40,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:04:40,439 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1730968545, now seen corresponding path program 1 times [2021-12-15 09:04:40,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:40,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169308145] [2021-12-15 09:04:40,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:40,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 144 proven. 6 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-15 09:04:40,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169308145] [2021-12-15 09:04:40,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169308145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424399331] [2021-12-15 09:04:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:40,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:40,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:40,792 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:40,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:04:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:04:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-12-15 09:04:41,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:41,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424399331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:41,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:41,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:41,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965697335] [2021-12-15 09:04:41,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:41,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:41,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:41,254 INFO L87 Difference]: Start difference. First operand 130505 states and 145412 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 09:04:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:42,438 INFO L93 Difference]: Finished difference Result 269754 states and 301159 transitions. [2021-12-15 09:04:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 317 [2021-12-15 09:04:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:42,606 INFO L225 Difference]: With dead ends: 269754 [2021-12-15 09:04:42,606 INFO L226 Difference]: Without dead ends: 139860 [2021-12-15 09:04:42,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:42,652 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 195 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:42,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 331 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139860 states. [2021-12-15 09:04:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139860 to 139846. [2021-12-15 09:04:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139846 states, 139845 states have (on average 1.1088776860095104) internal successors, (155071), 139845 states have internal predecessors, (155071), 0 states have call successors, (0), 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 09:04:44,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139846 states to 139846 states and 155071 transitions. [2021-12-15 09:04:44,834 INFO L78 Accepts]: Start accepts. Automaton has 139846 states and 155071 transitions. Word has length 317 [2021-12-15 09:04:44,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:44,835 INFO L470 AbstractCegarLoop]: Abstraction has 139846 states and 155071 transitions. [2021-12-15 09:04:44,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 09:04:44,835 INFO L276 IsEmpty]: Start isEmpty. Operand 139846 states and 155071 transitions. [2021-12-15 09:04:44,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-12-15 09:04:44,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:44,900 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:04:44,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:45,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 09:04:45,101 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:45,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1177160409, now seen corresponding path program 1 times [2021-12-15 09:04:45,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:45,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838677625] [2021-12-15 09:04:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:45,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 81 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-15 09:04:45,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838677625] [2021-12-15 09:04:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838677625] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:45,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380438165] [2021-12-15 09:04:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:45,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:45,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:45,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:04:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:45,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:45,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:04:45,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:45,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380438165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:45,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:45,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:45,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020350463] [2021-12-15 09:04:45,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:45,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:45,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:45,647 INFO L87 Difference]: Start difference. First operand 139846 states and 155071 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:04:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:46,890 INFO L93 Difference]: Finished difference Result 277665 states and 307677 transitions. [2021-12-15 09:04:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 325 [2021-12-15 09:04:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:47,065 INFO L225 Difference]: With dead ends: 277665 [2021-12-15 09:04:47,065 INFO L226 Difference]: Without dead ends: 138835 [2021-12-15 09:04:47,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:47,119 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 248 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:47,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 80 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138835 states. [2021-12-15 09:04:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138835 to 134769. [2021-12-15 09:04:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134769 states, 134768 states have (on average 1.1001276267363171) internal successors, (148262), 134768 states have internal predecessors, (148262), 0 states have call successors, (0), 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 09:04:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134769 states to 134769 states and 148262 transitions. [2021-12-15 09:04:49,208 INFO L78 Accepts]: Start accepts. Automaton has 134769 states and 148262 transitions. Word has length 325 [2021-12-15 09:04:49,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:49,208 INFO L470 AbstractCegarLoop]: Abstraction has 134769 states and 148262 transitions. [2021-12-15 09:04:49,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 09:04:49,208 INFO L276 IsEmpty]: Start isEmpty. Operand 134769 states and 148262 transitions. [2021-12-15 09:04:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-12-15 09:04:49,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:49,275 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:49,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-15 09:04:49,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-15 09:04:49,479 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:49,480 INFO L85 PathProgramCache]: Analyzing trace with hash 19103636, now seen corresponding path program 1 times [2021-12-15 09:04:49,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:49,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523153143] [2021-12-15 09:04:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:49,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-15 09:04:49,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523153143] [2021-12-15 09:04:49,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523153143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:49,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33695679] [2021-12-15 09:04:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:49,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:49,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:49,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:49,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:04:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:50,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:50,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:04:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:04:50,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:04:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33695679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:50,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:04:50,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:04:50,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98634449] [2021-12-15 09:04:50,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:50,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:04:50,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:04:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:50,399 INFO L87 Difference]: Start difference. First operand 134769 states and 148262 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:51,393 INFO L93 Difference]: Finished difference Result 258190 states and 283959 transitions. [2021-12-15 09:04:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:04:51,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-12-15 09:04:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:51,556 INFO L225 Difference]: With dead ends: 258190 [2021-12-15 09:04:51,556 INFO L226 Difference]: Without dead ends: 124032 [2021-12-15 09:04:51,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:04:51,631 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:51,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 287 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:04:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124032 states. [2021-12-15 09:04:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124032 to 124008. [2021-12-15 09:04:53,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124008 states, 124007 states have (on average 1.0943495125275187) internal successors, (135707), 124007 states have internal predecessors, (135707), 0 states have call successors, (0), 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 09:04:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124008 states to 124008 states and 135707 transitions. [2021-12-15 09:04:53,469 INFO L78 Accepts]: Start accepts. Automaton has 124008 states and 135707 transitions. Word has length 328 [2021-12-15 09:04:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:53,469 INFO L470 AbstractCegarLoop]: Abstraction has 124008 states and 135707 transitions. [2021-12-15 09:04:53,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:04:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 124008 states and 135707 transitions. [2021-12-15 09:04:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-12-15 09:04:53,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:53,533 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:53,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:04:53,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-15 09:04:53,748 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:53,749 INFO L85 PathProgramCache]: Analyzing trace with hash -852193233, now seen corresponding path program 1 times [2021-12-15 09:04:53,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:53,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237025650] [2021-12-15 09:04:53,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:53,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-15 09:04:54,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:54,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237025650] [2021-12-15 09:04:54,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237025650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:04:54,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:04:54,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:04:54,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138334664] [2021-12-15 09:04:54,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:04:54,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:04:54,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:04:54,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:04:54,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:04:54,150 INFO L87 Difference]: Start difference. First operand 124008 states and 135707 transitions. Second operand has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 09:04:55,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:04:55,575 INFO L93 Difference]: Finished difference Result 326633 states and 356854 transitions. [2021-12-15 09:04:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:04:55,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 330 [2021-12-15 09:04:55,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:04:56,214 INFO L225 Difference]: With dead ends: 326633 [2021-12-15 09:04:56,215 INFO L226 Difference]: Without dead ends: 203642 [2021-12-15 09:04:56,240 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 09:04:56,241 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 463 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:04:56,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 403 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:04:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203642 states. [2021-12-15 09:04:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203642 to 200792. [2021-12-15 09:04:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200792 states, 200791 states have (on average 1.0904572416094347) internal successors, (218954), 200791 states have internal predecessors, (218954), 0 states have call successors, (0), 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 09:04:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200792 states to 200792 states and 218954 transitions. [2021-12-15 09:04:59,235 INFO L78 Accepts]: Start accepts. Automaton has 200792 states and 218954 transitions. Word has length 330 [2021-12-15 09:04:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:04:59,235 INFO L470 AbstractCegarLoop]: Abstraction has 200792 states and 218954 transitions. [2021-12-15 09:04:59,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.5) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 09:04:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 200792 states and 218954 transitions. [2021-12-15 09:04:59,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-12-15 09:04:59,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:04:59,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:04:59,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:04:59,337 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:04:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:04:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash -441843519, now seen corresponding path program 1 times [2021-12-15 09:04:59,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:04:59,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254034025] [2021-12-15 09:04:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:59,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:04:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 150 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:04:59,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:04:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254034025] [2021-12-15 09:04:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254034025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:04:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161023747] [2021-12-15 09:04:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:04:59,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:04:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:04:59,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:04:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:04:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:04:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:04:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-15 09:05:00,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161023747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:00,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:00,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:00,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838532540] [2021-12-15 09:05:00,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:00,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:00,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:00,096 INFO L87 Difference]: Start difference. First operand 200792 states and 218954 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 09:05:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:05:01,913 INFO L93 Difference]: Finished difference Result 397127 states and 433188 transitions. [2021-12-15 09:05:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:05:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 340 [2021-12-15 09:05:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:05:02,243 INFO L225 Difference]: With dead ends: 397127 [2021-12-15 09:05:02,244 INFO L226 Difference]: Without dead ends: 197352 [2021-12-15 09:05:02,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:02,349 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 74 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:05:02,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 278 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:05:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197352 states. [2021-12-15 09:05:04,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197352 to 194093. [2021-12-15 09:05:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194093 states, 194092 states have (on average 1.0856088865074294) internal successors, (210708), 194092 states have internal predecessors, (210708), 0 states have call successors, (0), 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 09:05:05,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194093 states to 194093 states and 210708 transitions. [2021-12-15 09:05:05,378 INFO L78 Accepts]: Start accepts. Automaton has 194093 states and 210708 transitions. Word has length 340 [2021-12-15 09:05:05,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:05:05,378 INFO L470 AbstractCegarLoop]: Abstraction has 194093 states and 210708 transitions. [2021-12-15 09:05:05,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 09:05:05,379 INFO L276 IsEmpty]: Start isEmpty. Operand 194093 states and 210708 transitions. [2021-12-15 09:05:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2021-12-15 09:05:05,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:05:05,462 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:05:05,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 09:05:05,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:05,672 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:05:05,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:05:05,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2080611135, now seen corresponding path program 1 times [2021-12-15 09:05:05,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:05:05,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19534119] [2021-12-15 09:05:05,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:05,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:05:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-15 09:05:05,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:05:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19534119] [2021-12-15 09:05:05,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19534119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:05:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031963254] [2021-12-15 09:05:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:05:05,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:05:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:05:05,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:05:05,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 09:05:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:05:05,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:05:05,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:05:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:05:06,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:05:06,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031963254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:05:06,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:05:06,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:05:06,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755302428] [2021-12-15 09:05:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:05:06,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:05:06,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:05:06,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:05:06,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:05:06,246 INFO L87 Difference]: Start difference. First operand 194093 states and 210708 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)