./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/test/easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/test/easy1.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 a21fbf45ca363282cdf47b25dd1f95f64b9021c4 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 20:43:44,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 20:43:44,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 20:43:44,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 20:43:44,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 20:43:44,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 20:43:44,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 20:43:44,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 20:43:44,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 20:43:44,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 20:43:44,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 20:43:44,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 20:43:44,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 20:43:44,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 20:43:44,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 20:43:44,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 20:43:44,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 20:43:44,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 20:43:44,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 20:43:44,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 20:43:44,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 20:43:44,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 20:43:44,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 20:43:44,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 20:43:44,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 20:43:44,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 20:43:44,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 20:43:44,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 20:43:44,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 20:43:44,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 20:43:44,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 20:43:44,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 20:43:44,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 20:43:44,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 20:43:44,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 20:43:44,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 20:43:44,279 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 20:43:44,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 20:43:44,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 20:43:44,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 20:43:44,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 20:43:44,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 20:43:44,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 20:43:44,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 20:43:44,349 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 20:43:44,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 20:43:44,352 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 20:43:44,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 20:43:44,353 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 20:43:44,353 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 20:43:44,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 20:43:44,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 20:43:44,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 20:43:44,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 20:43:44,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 20:43:44,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 20:43:44,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 20:43:44,357 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 20:43:44,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 20:43:44,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 20:43:44,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 20:43:44,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 20:43:44,358 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 20:43:44,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 20:43:44,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:43:44,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 20:43:44,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 20:43:44,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 20:43:44,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 20:43:44,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 20:43:44,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 20:43:44,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 20:43:44,361 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a21fbf45ca363282cdf47b25dd1f95f64b9021c4 [2021-10-05 20:43:44,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 20:43:44,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 20:43:44,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 20:43:44,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 20:43:44,839 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 20:43:44,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-05 20:43:44,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4c19a2b4/49f782edddc24498b40b3934573b406b/FLAG7f063159f [2021-10-05 20:43:45,583 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 20:43:45,585 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy1.wvr.c [2021-10-05 20:43:45,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4c19a2b4/49f782edddc24498b40b3934573b406b/FLAG7f063159f [2021-10-05 20:43:45,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4c19a2b4/49f782edddc24498b40b3934573b406b [2021-10-05 20:43:45,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 20:43:45,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 20:43:45,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 20:43:45,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 20:43:45,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 20:43:45,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:43:45" (1/1) ... [2021-10-05 20:43:45,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f54eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:45, skipping insertion in model container [2021-10-05 20:43:45,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 08:43:45" (1/1) ... [2021-10-05 20:43:45,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 20:43:45,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 20:43:46,288 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy1.wvr.c[1826,1839] [2021-10-05 20:43:46,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:43:46,306 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 20:43:46,330 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/test/easy1.wvr.c[1826,1839] [2021-10-05 20:43:46,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 20:43:46,349 INFO L208 MainTranslator]: Completed translation [2021-10-05 20:43:46,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46 WrapperNode [2021-10-05 20:43:46,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 20:43:46,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 20:43:46,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 20:43:46,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 20:43:46,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 20:43:46,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 20:43:46,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 20:43:46,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 20:43:46,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 20:43:46,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 20:43:46,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 20:43:46,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 20:43:46,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (1/1) ... [2021-10-05 20:43:46,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 20:43:46,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:46,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 20:43:46,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 20:43:46,555 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 20:43:46,555 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 20:43:46,556 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 20:43:46,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 20:43:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 20:43:46,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 20:43:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 20:43:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 20:43:46,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 20:43:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 20:43:46,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 20:43:46,560 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 20:43:46,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 20:43:46,837 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-05 20:43:46,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:43:46 BoogieIcfgContainer [2021-10-05 20:43:46,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 20:43:46,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 20:43:46,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 20:43:46,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 20:43:46,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 08:43:45" (1/3) ... [2021-10-05 20:43:46,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616f8656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:43:46, skipping insertion in model container [2021-10-05 20:43:46,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 08:43:46" (2/3) ... [2021-10-05 20:43:46,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@616f8656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 08:43:46, skipping insertion in model container [2021-10-05 20:43:46,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:43:46" (3/3) ... [2021-10-05 20:43:46,862 INFO L111 eAbstractionObserver]: Analyzing ICFG easy1.wvr.c [2021-10-05 20:43:46,877 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 20:43:46,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 20:43:46,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 20:43:46,883 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 20:43:46,959 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,962 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,963 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,964 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,966 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,967 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,971 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,972 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,972 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,973 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,973 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,974 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,985 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:46,986 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:47,004 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:47,004 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:47,005 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 20:43:47,021 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 20:43:47,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 20:43:47,139 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-05 20:43:47,140 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 20:43:47,176 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 20:43:47,193 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 158 flow [2021-10-05 20:43:47,198 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 158 flow [2021-10-05 20:43:47,201 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 158 flow [2021-10-05 20:43:47,304 INFO L129 PetriNetUnfolder]: 6/69 cut-off events. [2021-10-05 20:43:47,304 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 20:43:47,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-10-05 20:43:47,317 INFO L116 LiptonReduction]: Number of co-enabled transitions 308 [2021-10-05 20:43:50,297 INFO L131 LiptonReduction]: Checked pairs total: 312 [2021-10-05 20:43:50,297 INFO L133 LiptonReduction]: Total number of compositions: 63 [2021-10-05 20:43:50,309 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-10-05 20:43:50,320 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 20:43:50,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:50,330 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:50,331 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 730658326, now seen corresponding path program 1 times [2021-10-05 20:43:50,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:50,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901339862] [2021-10-05 20:43:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:50,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:50,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:50,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:50,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901339862] [2021-10-05 20:43:50,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901339862] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:43:50,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:43:50,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-05 20:43:50,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554840615] [2021-10-05 20:43:50,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 20:43:50,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 20:43:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 20:43:50,707 INFO L87 Difference]: Start difference. First operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 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, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:50,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:50,745 INFO L93 Difference]: Finished difference Result 37 states and 77 transitions. [2021-10-05 20:43:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 20:43:50,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-05 20:43:50,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:50,763 INFO L225 Difference]: With dead ends: 37 [2021-10-05 20:43:50,764 INFO L226 Difference]: Without dead ends: 32 [2021-10-05 20:43:50,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 20:43:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-05 20:43:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-05 20:43:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 67 transitions. [2021-10-05 20:43:50,817 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 67 transitions. Word has length 11 [2021-10-05 20:43:50,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:50,819 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 67 transitions. [2021-10-05 20:43:50,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:50,820 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 67 transitions. [2021-10-05 20:43:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-05 20:43:50,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:50,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:50,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 20:43:50,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2105695694, now seen corresponding path program 1 times [2021-10-05 20:43:50,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:50,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499881818] [2021-10-05 20:43:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:50,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:50,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:50,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499881818] [2021-10-05 20:43:50,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499881818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:50,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528160323] [2021-10-05 20:43:50,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:50,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:50,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:51,007 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:51,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 20:43:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 20:43:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:51,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528160323] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:51,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:51,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-05 20:43:51,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393470069] [2021-10-05 20:43:51,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 20:43:51,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:51,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 20:43:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:43:51,333 INFO L87 Difference]: Start difference. First operand 32 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:51,397 INFO L93 Difference]: Finished difference Result 77 states and 152 transitions. [2021-10-05 20:43:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 20:43:51,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 12 [2021-10-05 20:43:51,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:51,400 INFO L225 Difference]: With dead ends: 77 [2021-10-05 20:43:51,400 INFO L226 Difference]: Without dead ends: 72 [2021-10-05 20:43:51,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:43:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-05 20:43:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2021-10-05 20:43:51,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 94 transitions. [2021-10-05 20:43:51,425 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 94 transitions. Word has length 12 [2021-10-05 20:43:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:51,426 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 94 transitions. [2021-10-05 20:43:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,427 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 94 transitions. [2021-10-05 20:43:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-05 20:43:51,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:51,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:51,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:51,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:51,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -623783985, now seen corresponding path program 1 times [2021-10-05 20:43:51,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:51,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594882584] [2021-10-05 20:43:51,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:51,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:51,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:51,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594882584] [2021-10-05 20:43:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594882584] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:43:51,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 20:43:51,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 20:43:51,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914157673] [2021-10-05 20:43:51,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 20:43:51,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:51,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 20:43:51,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 20:43:51,751 INFO L87 Difference]: Start difference. First operand 42 states and 94 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:51,783 INFO L93 Difference]: Finished difference Result 52 states and 109 transitions. [2021-10-05 20:43:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 20:43:51,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-10-05 20:43:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:51,787 INFO L225 Difference]: With dead ends: 52 [2021-10-05 20:43:51,787 INFO L226 Difference]: Without dead ends: 44 [2021-10-05 20:43:51,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 20:43:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-05 20:43:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-05 20:43:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.255813953488372) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 97 transitions. [2021-10-05 20:43:51,797 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 97 transitions. Word has length 12 [2021-10-05 20:43:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:51,798 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 97 transitions. [2021-10-05 20:43:51,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 97 transitions. [2021-10-05 20:43:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-05 20:43:51,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:51,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:51,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 20:43:51,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 373038043, now seen corresponding path program 2 times [2021-10-05 20:43:51,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:51,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939705931] [2021-10-05 20:43:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:51,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:51,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:51,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939705931] [2021-10-05 20:43:51,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939705931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:51,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294211201] [2021-10-05 20:43:51,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 20:43:51,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:51,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:51,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:51,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 20:43:51,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 20:43:51,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-05 20:43:51,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:52,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294211201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:52,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:52,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-10-05 20:43:52,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240695431] [2021-10-05 20:43:52,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 20:43:52,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 20:43:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:43:52,081 INFO L87 Difference]: Start difference. First operand 44 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:52,118 INFO L93 Difference]: Finished difference Result 48 states and 107 transitions. [2021-10-05 20:43:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 20:43:52,119 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 12 [2021-10-05 20:43:52,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:52,125 INFO L225 Difference]: With dead ends: 48 [2021-10-05 20:43:52,126 INFO L226 Difference]: Without dead ends: 48 [2021-10-05 20:43:52,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-05 20:43:52,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-05 20:43:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-10-05 20:43:52,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 45 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 104 transitions. [2021-10-05 20:43:52,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 104 transitions. Word has length 12 [2021-10-05 20:43:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:52,154 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 104 transitions. [2021-10-05 20:43:52,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 104 transitions. [2021-10-05 20:43:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 20:43:52,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:52,160 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:52,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:52,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:52,362 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:52,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1090209389, now seen corresponding path program 1 times [2021-10-05 20:43:52,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:52,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217168263] [2021-10-05 20:43:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:52,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:52,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:52,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217168263] [2021-10-05 20:43:52,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217168263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:52,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603771824] [2021-10-05 20:43:52,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:52,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:52,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:52,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 20:43:52,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 20:43:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:52,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603771824] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:43:52,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 20:43:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-10-05 20:43:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860389722] [2021-10-05 20:43:52,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-05 20:43:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:52,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-05 20:43:52,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:52,827 INFO L87 Difference]: Start difference. First operand 46 states and 104 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:52,882 INFO L93 Difference]: Finished difference Result 93 states and 195 transitions. [2021-10-05 20:43:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 20:43:52,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 20:43:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:52,884 INFO L225 Difference]: With dead ends: 93 [2021-10-05 20:43:52,885 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 20:43:52,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:52,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 20:43:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-10-05 20:43:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-10-05 20:43:52,894 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 13 [2021-10-05 20:43:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-10-05 20:43:52,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-10-05 20:43:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 20:43:52,896 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:52,897 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:52,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:53,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:53,112 INFO L82 PathProgramCache]: Analyzing trace with hash 627539671, now seen corresponding path program 2 times [2021-10-05 20:43:53,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:53,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974272642] [2021-10-05 20:43:53,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:53,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:53,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:53,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974272642] [2021-10-05 20:43:53,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974272642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:53,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572794211] [2021-10-05 20:43:53,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 20:43:53,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:53,225 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 20:43:53,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 20:43:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-05 20:43:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:53,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572794211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:53,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 8 [2021-10-05 20:43:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571859534] [2021-10-05 20:43:53,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 20:43:53,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 20:43:53,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:53,441 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:53,562 INFO L93 Difference]: Finished difference Result 101 states and 225 transitions. [2021-10-05 20:43:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:43:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 20:43:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:53,564 INFO L225 Difference]: With dead ends: 101 [2021-10-05 20:43:53,564 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 20:43:53,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-05 20:43:53,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 20:43:53,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2021-10-05 20:43:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4915254237288136) internal successors, (147), 59 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2021-10-05 20:43:53,588 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 13 [2021-10-05 20:43:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:53,589 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2021-10-05 20:43:53,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2021-10-05 20:43:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:53,593 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:53,593 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:53,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-05 20:43:53,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:53,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:53,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:53,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1083392945, now seen corresponding path program 3 times [2021-10-05 20:43:53,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:53,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882566772] [2021-10-05 20:43:53,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:53,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:53,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:53,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882566772] [2021-10-05 20:43:53,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882566772] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:53,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647468089] [2021-10-05 20:43:53,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 20:43:53,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:53,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:53,885 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:53,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 20:43:53,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 20:43:53,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:54,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647468089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:54,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:54,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-05 20:43:54,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711036836] [2021-10-05 20:43:54,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 20:43:54,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:54,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 20:43:54,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:54,065 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:54,200 INFO L93 Difference]: Finished difference Result 122 states and 263 transitions. [2021-10-05 20:43:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 20:43:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:54,203 INFO L225 Difference]: With dead ends: 122 [2021-10-05 20:43:54,203 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 20:43:54,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-05 20:43:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 20:43:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 66. [2021-10-05 20:43:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6615384615384614) internal successors, (173), 65 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 173 transitions. [2021-10-05 20:43:54,212 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 173 transitions. Word has length 14 [2021-10-05 20:43:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 173 transitions. [2021-10-05 20:43:54,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 173 transitions. [2021-10-05 20:43:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:54,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:54,215 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:54,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-05 20:43:54,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:54,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:54,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:54,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1906197074, now seen corresponding path program 4 times [2021-10-05 20:43:54,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:54,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147630512] [2021-10-05 20:43:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:54,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:54,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:54,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147630512] [2021-10-05 20:43:54,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147630512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:54,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033942403] [2021-10-05 20:43:54,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 20:43:54,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:54,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:54,504 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:54,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 20:43:54,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 20:43:54,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:54,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:54,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:54,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033942403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:54,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:54,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-05 20:43:54,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178621007] [2021-10-05 20:43:54,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 20:43:54,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:54,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 20:43:54,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-05 20:43:54,654 INFO L87 Difference]: Start difference. First operand 66 states and 173 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:54,708 INFO L93 Difference]: Finished difference Result 94 states and 218 transitions. [2021-10-05 20:43:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:43:54,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 20:43:54,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:54,710 INFO L225 Difference]: With dead ends: 94 [2021-10-05 20:43:54,710 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 20:43:54,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 20:43:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-10-05 20:43:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.56) internal successors, (192), 75 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 192 transitions. [2021-10-05 20:43:54,718 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 192 transitions. Word has length 14 [2021-10-05 20:43:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:54,718 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 192 transitions. [2021-10-05 20:43:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 192 transitions. [2021-10-05 20:43:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:54,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:54,720 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:54,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:54,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:54,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:54,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash -322194225, now seen corresponding path program 5 times [2021-10-05 20:43:54,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:54,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219039147] [2021-10-05 20:43:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:54,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:54,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219039147] [2021-10-05 20:43:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219039147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:54,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456432132] [2021-10-05 20:43:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 20:43:54,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:54,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:54,997 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:55,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 20:43:55,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 20:43:55,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 20:43:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:55,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456432132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:55,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:55,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-05 20:43:55,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627128300] [2021-10-05 20:43:55,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:43:55,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:43:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:43:55,171 INFO L87 Difference]: Start difference. First operand 76 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:55,261 INFO L93 Difference]: Finished difference Result 100 states and 226 transitions. [2021-10-05 20:43:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 20:43:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:55,263 INFO L225 Difference]: With dead ends: 100 [2021-10-05 20:43:55,263 INFO L226 Difference]: Without dead ends: 98 [2021-10-05 20:43:55,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-05 20:43:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-05 20:43:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2021-10-05 20:43:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.533333333333333) internal successors, (190), 75 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 190 transitions. [2021-10-05 20:43:55,269 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 190 transitions. Word has length 14 [2021-10-05 20:43:55,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:55,270 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 190 transitions. [2021-10-05 20:43:55,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 190 transitions. [2021-10-05 20:43:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:55,271 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:55,271 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:55,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:55,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:55,486 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash 158554882, now seen corresponding path program 6 times [2021-10-05 20:43:55,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:55,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46746551] [2021-10-05 20:43:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:55,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:55,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:55,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:55,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46746551] [2021-10-05 20:43:55,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46746551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:55,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913302344] [2021-10-05 20:43:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 20:43:55,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:55,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:55,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:55,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 20:43:55,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 20:43:55,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:55,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:55,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913302344] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:55,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:55,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-05 20:43:55,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817736283] [2021-10-05 20:43:55,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:43:55,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:43:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:43:55,761 INFO L87 Difference]: Start difference. First operand 76 states and 190 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:55,816 INFO L93 Difference]: Finished difference Result 104 states and 238 transitions. [2021-10-05 20:43:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:43:55,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:55,818 INFO L225 Difference]: With dead ends: 104 [2021-10-05 20:43:55,818 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 20:43:55,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 20:43:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-10-05 20:43:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.537313432835821) internal successors, (170), 67 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 170 transitions. [2021-10-05 20:43:55,824 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 170 transitions. Word has length 14 [2021-10-05 20:43:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:55,824 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 170 transitions. [2021-10-05 20:43:55,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 170 transitions. [2021-10-05 20:43:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:55,825 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:55,826 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:55,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:56,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-05 20:43:56,041 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -703887524, now seen corresponding path program 7 times [2021-10-05 20:43:56,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:56,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096636461] [2021-10-05 20:43:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:56,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:56,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:56,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096636461] [2021-10-05 20:43:56,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096636461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:56,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650711419] [2021-10-05 20:43:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 20:43:56,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:56,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:56,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 20:43:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-05 20:43:56,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 20:43:56,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650711419] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 20:43:56,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-05 20:43:56,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-10-05 20:43:56,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284533656] [2021-10-05 20:43:56,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-05 20:43:56,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-05 20:43:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-05 20:43:56,371 INFO L87 Difference]: Start difference. First operand 68 states and 170 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:56,397 INFO L93 Difference]: Finished difference Result 95 states and 215 transitions. [2021-10-05 20:43:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-05 20:43:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:56,399 INFO L225 Difference]: With dead ends: 95 [2021-10-05 20:43:56,400 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 20:43:56,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-05 20:43:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 20:43:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-10-05 20:43:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 135 transitions. [2021-10-05 20:43:56,405 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 135 transitions. Word has length 14 [2021-10-05 20:43:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:56,405 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 135 transitions. [2021-10-05 20:43:56,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 135 transitions. [2021-10-05 20:43:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:56,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:56,408 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:56,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:56,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:56,622 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 474505006, now seen corresponding path program 8 times [2021-10-05 20:43:56,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:56,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963892537] [2021-10-05 20:43:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:56,624 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:56,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:56,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963892537] [2021-10-05 20:43:56,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963892537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:56,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424738471] [2021-10-05 20:43:56,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 20:43:56,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:56,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:56,676 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:56,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 20:43:56,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 20:43:56,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:56,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424738471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:56,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:56,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-05 20:43:56,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011017883] [2021-10-05 20:43:56,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-05 20:43:56,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:56,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-05 20:43:56,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-05 20:43:56,879 INFO L87 Difference]: Start difference. First operand 58 states and 135 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:56,963 INFO L93 Difference]: Finished difference Result 74 states and 158 transitions. [2021-10-05 20:43:56,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 20:43:56,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:56,964 INFO L225 Difference]: With dead ends: 74 [2021-10-05 20:43:56,965 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 20:43:56,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-10-05 20:43:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 20:43:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2021-10-05 20:43:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.377049180327869) internal successors, (145), 61 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 145 transitions. [2021-10-05 20:43:56,972 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 145 transitions. Word has length 14 [2021-10-05 20:43:56,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:56,974 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 145 transitions. [2021-10-05 20:43:56,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:56,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 145 transitions. [2021-10-05 20:43:56,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:56,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:56,978 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:57,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-05 20:43:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-05 20:43:57,192 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:57,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:57,192 INFO L82 PathProgramCache]: Analyzing trace with hash 963417819, now seen corresponding path program 9 times [2021-10-05 20:43:57,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:57,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862575891] [2021-10-05 20:43:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:57,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:57,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862575891] [2021-10-05 20:43:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862575891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:57,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331258005] [2021-10-05 20:43:57,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 20:43:57,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:57,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:57,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:57,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 20:43:57,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 20:43:57,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:57,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:57,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:57,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331258005] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:57,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:57,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-05 20:43:57,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486850217] [2021-10-05 20:43:57,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 20:43:57,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:57,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 20:43:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-05 20:43:57,456 INFO L87 Difference]: Start difference. First operand 62 states and 145 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:57,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:57,505 INFO L93 Difference]: Finished difference Result 84 states and 184 transitions. [2021-10-05 20:43:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 20:43:57,505 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 20:43:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:57,508 INFO L225 Difference]: With dead ends: 84 [2021-10-05 20:43:57,508 INFO L226 Difference]: Without dead ends: 80 [2021-10-05 20:43:57,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-05 20:43:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2021-10-05 20:43:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 59 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:57,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 140 transitions. [2021-10-05 20:43:57,514 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 140 transitions. Word has length 14 [2021-10-05 20:43:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:57,515 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 140 transitions. [2021-10-05 20:43:57,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:57,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 140 transitions. [2021-10-05 20:43:57,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 20:43:57,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:57,516 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:57,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-05 20:43:57,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:57,730 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:57,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:57,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2015827438, now seen corresponding path program 10 times [2021-10-05 20:43:57,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:57,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396572832] [2021-10-05 20:43:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:57,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:57,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:57,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396572832] [2021-10-05 20:43:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396572832] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:57,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14010563] [2021-10-05 20:43:57,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 20:43:57,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:57,790 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:57,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 20:43:57,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 20:43:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-05 20:43:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:58,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14010563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:58,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:58,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-05 20:43:58,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707999059] [2021-10-05 20:43:58,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-05 20:43:58,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-05 20:43:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-05 20:43:58,014 INFO L87 Difference]: Start difference. First operand 60 states and 140 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:58,093 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2021-10-05 20:43:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 20:43:58,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 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 14 [2021-10-05 20:43:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:58,094 INFO L225 Difference]: With dead ends: 66 [2021-10-05 20:43:58,094 INFO L226 Difference]: Without dead ends: 66 [2021-10-05 20:43:58,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-10-05 20:43:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-05 20:43:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-10-05 20:43:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 61 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 143 transitions. [2021-10-05 20:43:58,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 143 transitions. Word has length 14 [2021-10-05 20:43:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 143 transitions. [2021-10-05 20:43:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 143 transitions. [2021-10-05 20:43:58,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 20:43:58,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:58,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:58,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-05 20:43:58,302 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1024798538, now seen corresponding path program 11 times [2021-10-05 20:43:58,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:58,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913040295] [2021-10-05 20:43:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:58,303 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 20:43:58,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:58,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913040295] [2021-10-05 20:43:58,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913040295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:58,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318602658] [2021-10-05 20:43:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 20:43:58,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:58,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:58,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:58,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 20:43:58,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 20:43:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 20:43:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:58,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318602658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:58,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:58,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-05 20:43:58,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132035164] [2021-10-05 20:43:58,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 20:43:58,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:58,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 20:43:58,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-05 20:43:58,661 INFO L87 Difference]: Start difference. First operand 62 states and 143 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:58,919 INFO L93 Difference]: Finished difference Result 123 states and 270 transitions. [2021-10-05 20:43:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 20:43:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-10-05 20:43:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:58,920 INFO L225 Difference]: With dead ends: 123 [2021-10-05 20:43:58,920 INFO L226 Difference]: Without dead ends: 22 [2021-10-05 20:43:58,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-10-05 20:43:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-05 20:43:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-05 20:43:58,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2021-10-05 20:43:58,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2021-10-05 20:43:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:58,922 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2021-10-05 20:43:58,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2021-10-05 20:43:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 20:43:58,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 20:43:58,923 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 20:43:58,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 20:43:59,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 20:43:59,124 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 20:43:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 20:43:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1791617024, now seen corresponding path program 12 times [2021-10-05 20:43:59,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 20:43:59,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337315825] [2021-10-05 20:43:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 20:43:59,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 20:43:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 20:43:59,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 20:43:59,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 20:43:59,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337315825] [2021-10-05 20:43:59,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337315825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:59,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502523551] [2021-10-05 20:43:59,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 20:43:59,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 20:43:59,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 20:43:59,210 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 20:43:59,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 20:43:59,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 20:43:59,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 20:43:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-05 20:43:59,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 20:43:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 20:43:59,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502523551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 20:43:59,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 20:43:59,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-10-05 20:43:59,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83791939] [2021-10-05 20:43:59,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-05 20:43:59,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 20:43:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-05 20:43:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-10-05 20:43:59,486 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 20:43:59,627 INFO L93 Difference]: Finished difference Result 29 states and 44 transitions. [2021-10-05 20:43:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 20:43:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-10-05 20:43:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 20:43:59,628 INFO L225 Difference]: With dead ends: 29 [2021-10-05 20:43:59,628 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 20:43:59,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-10-05 20:43:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 20:43:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 20:43:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 20:43:59,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-10-05 20:43:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 20:43:59,630 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 20:43:59,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 20:43:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 20:43:59,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 20:43:59,633 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 20:43:59,633 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 20:43:59,633 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 20:43:59,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-05 20:43:59,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-05 20:43:59,839 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 20:43:59,840 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 20:43:59,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 08:43:59 BasicIcfg [2021-10-05 20:43:59,842 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 20:43:59,843 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 20:43:59,843 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 20:43:59,843 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 20:43:59,843 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 08:43:46" (3/4) ... [2021-10-05 20:43:59,847 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 20:43:59,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 20:43:59,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 20:43:59,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 20:43:59,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 20:43:59,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 20:43:59,862 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 20:43:59,898 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 20:43:59,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 20:43:59,900 INFO L168 Benchmark]: Toolchain (without parser) took 13977.30 ms. Allocated memory was 50.3 MB in the beginning and 88.1 MB in the end (delta: 37.7 MB). Free memory was 27.0 MB in the beginning and 36.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,901 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 25.4 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 20:43:59,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.86 ms. Allocated memory is still 50.3 MB. Free memory was 26.7 MB in the beginning and 32.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,902 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.27 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 30.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,902 INFO L168 Benchmark]: Boogie Preprocessor took 30.79 ms. Allocated memory is still 50.3 MB. Free memory was 30.7 MB in the beginning and 29.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,902 INFO L168 Benchmark]: RCFGBuilder took 425.86 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 29.4 MB in the beginning and 44.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,903 INFO L168 Benchmark]: TraceAbstraction took 12992.80 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 43.9 MB in the beginning and 39.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,903 INFO L168 Benchmark]: Witness Printer took 56.00 ms. Allocated memory is still 88.1 MB. Free memory was 39.3 MB in the beginning and 36.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 20:43:59,906 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 50.3 MB. Free memory was 25.5 MB in the beginning and 25.4 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 419.86 ms. Allocated memory is still 50.3 MB. Free memory was 26.7 MB in the beginning and 32.2 MB in the end (delta: -5.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.27 ms. Allocated memory is still 50.3 MB. Free memory was 32.2 MB in the beginning and 30.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.79 ms. Allocated memory is still 50.3 MB. Free memory was 30.7 MB in the beginning and 29.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 425.86 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 29.4 MB in the beginning and 44.5 MB in the end (delta: -15.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12992.80 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 43.9 MB in the beginning and 39.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 31.8 MB. Max. memory is 16.1 GB. * Witness Printer took 56.00 ms. Allocated memory is still 88.1 MB. Free memory was 39.3 MB in the beginning and 36.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3099.4ms, 72 PlacesBefore, 21 PlacesAfterwards, 71 TransitionsBefore, 16 TransitionsAfterwards, 308 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 63 TotalNumberOfCompositions, 312 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 312, positive: 312, positive conditional: 0, positive unconditional: 312, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 213, positive: 213, positive conditional: 0, positive unconditional: 213, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 213, positive: 213, positive conditional: 0, positive unconditional: 213, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 312, positive: 99, positive conditional: 0, positive unconditional: 99, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 213, unknown conditional: 0, unknown unconditional: 213] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 66]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 80 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 12717.6ms, OverallIterations: 16, TraceHistogramMax: 2, EmptinessCheckTime: 31.7ms, AutomataDifference: 1432.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3179.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 253 SDtfs, 493 SDslu, 656 SDs, 0 SdLazy, 692 SolverSat, 138 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 529.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 162 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 978.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=76occurred in iteration=8, InterpolantAutomatonStates: 120, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 171.5ms AutomataMinimizationTime, 16 MinimizatonAttempts, 274 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 125.4ms SsaConstructionTime, 691.4ms SatisfiabilityAnalysisTime, 2697.4ms InterpolantComputationTime, 407 NumberOfCodeBlocks, 407 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 377 ConstructedInterpolants, 0 QuantifiedInterpolants, 1763 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1234 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 30 InterpolantComputations, 4 PerfectInterpolantSequences, 45/101 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 20:43:59,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...