./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3 --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 ca099a0a865236295bec7881986648360a2333c3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:57:14,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:57:14,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:57:14,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:57:14,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:57:14,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:57:14,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:57:14,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:57:14,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:57:14,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:57:14,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:57:14,112 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:57:14,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:57:14,114 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:57:14,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:57:14,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:57:14,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:57:14,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:57:14,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:57:14,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:57:14,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:57:14,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:57:14,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:57:14,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:57:14,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:57:14,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:57:14,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:57:14,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:57:14,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:57:14,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:57:14,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:57:14,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:57:14,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:57:14,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:57:14,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:57:14,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:57:14,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:57:14,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:57:14,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:57:14,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:57:14,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:57:14,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:57:14,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:57:14,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:57:14,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:57:14,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:57:14,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:57:14,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:57:14,177 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:57:14,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:57:14,178 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:57:14,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:57:14,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:57:14,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:57:14,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:57:14,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:57:14,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:57:14,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:57:14,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:57:14,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:57:14,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:57:14,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:57:14,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:57:14,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:57:14,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:14,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:57:14,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:57:14,183 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:57:14,183 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:57:14,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:57:14,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:57:14,184 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:57:14,184 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:57:14,184 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:57:14,185 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca099a0a865236295bec7881986648360a2333c3 [2021-10-15 19:57:14,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:57:14,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:57:14,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:57:14,467 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:57:14,468 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:57:14,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-15 19:57:14,555 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/data/468cdad0c/517dde7d170947d1ae81967e7f7e46f4/FLAG5e6a7f57b [2021-10-15 19:57:15,144 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:57:15,145 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/sv-benchmarks/c/eca-rers2012/Problem01_label42.c [2021-10-15 19:57:15,166 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/data/468cdad0c/517dde7d170947d1ae81967e7f7e46f4/FLAG5e6a7f57b [2021-10-15 19:57:15,389 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/data/468cdad0c/517dde7d170947d1ae81967e7f7e46f4 [2021-10-15 19:57:15,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:57:15,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:57:15,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:15,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:57:15,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:57:15,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:15" (1/1) ... [2021-10-15 19:57:15,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2532f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:15, skipping insertion in model container [2021-10-15 19:57:15,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:57:15" (1/1) ... [2021-10-15 19:57:15,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:57:15,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:57:15,810 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-15 19:57:15,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:15,853 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:57:15,993 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/sv-benchmarks/c/eca-rers2012/Problem01_label42.c[19849,19862] [2021-10-15 19:57:16,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:57:16,021 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:57:16,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16 WrapperNode [2021-10-15 19:57:16,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:57:16,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:57:16,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:57:16,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:57:16,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:57:16,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:57:16,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:57:16,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:57:16,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:57:16,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:57:16,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:57:16,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:57:16,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (1/1) ... [2021-10-15 19:57:16,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:57:16,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:16,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:57:16,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:57:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:57:16,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:57:16,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:57:16,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:57:17,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:57:17,410 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:57:17,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:17 BoogieIcfgContainer [2021-10-15 19:57:17,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:57:17,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:57:17,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:57:17,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:57:17,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:57:15" (1/3) ... [2021-10-15 19:57:17,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c71c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:17, skipping insertion in model container [2021-10-15 19:57:17,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:57:16" (2/3) ... [2021-10-15 19:57:17,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c71c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:57:17, skipping insertion in model container [2021-10-15 19:57:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:17" (3/3) ... [2021-10-15 19:57:17,421 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label42.c [2021-10-15 19:57:17,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:57:17,427 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:57:17,477 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:57:17,484 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 19:57:17,484 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:57:17,518 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:57:17,630 INFO L129 PetriNetUnfolder]: 130/327 cut-off events. [2021-10-15 19:57:17,631 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:17,633 INFO L84 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 327 events. 130/327 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 203 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 0. Up to 67 conditions per place. [2021-10-15 19:57:17,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 327 transitions, 654 flow [2021-10-15 19:57:17,643 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 322 transitions, 644 flow [2021-10-15 19:57:17,671 INFO L129 PetriNetUnfolder]: 111/272 cut-off events. [2021-10-15 19:57:17,672 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:17,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:17,673 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:17,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:17,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1613704130, now seen corresponding path program 1 times [2021-10-15 19:57:17,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:17,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302461870] [2021-10-15 19:57:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:17,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:18,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:18,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302461870] [2021-10-15 19:57:18,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302461870] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:18,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:18,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584817275] [2021-10-15 19:57:18,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:18,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:18,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:18,253 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:18,257 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 322 transitions, 644 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:18,257 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:18,257 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:18,259 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:19,094 INFO L129 PetriNetUnfolder]: 140/465 cut-off events. [2021-10-15 19:57:19,095 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:57:19,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 465 events. 140/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 661 event pairs, 0 based on Foata normal form. 61/326 useless extension candidates. Maximal degree in co-relation 1. Up to 250 conditions per place. [2021-10-15 19:57:19,103 INFO L132 encePairwiseOnDemand]: 138/327 looper letters, 309 selfloop transitions, 55 changer transitions 91/461 dead transitions. [2021-10-15 19:57:19,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 461 transitions, 1832 flow [2021-10-15 19:57:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:19,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2021-10-15 19:57:19,127 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6085626911314985 [2021-10-15 19:57:19,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2021-10-15 19:57:19,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2021-10-15 19:57:19,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:19,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2021-10-15 19:57:19,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,155 INFO L186 Difference]: Start difference. First operand has 195 places, 322 transitions, 644 flow. Second operand 3 states and 597 transitions. [2021-10-15 19:57:19,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 461 transitions, 1832 flow [2021-10-15 19:57:19,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 461 transitions, 1832 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:57:19,176 INFO L242 Difference]: Finished difference. Result has 199 places, 243 transitions, 816 flow [2021-10-15 19:57:19,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=816, PETRI_PLACES=199, PETRI_TRANSITIONS=243} [2021-10-15 19:57:19,179 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, 4 predicate places. [2021-10-15 19:57:19,179 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 243 transitions, 816 flow [2021-10-15 19:57:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,180 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:19,180 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:19,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:57:19,181 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1626358534, now seen corresponding path program 1 times [2021-10-15 19:57:19,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:19,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393059986] [2021-10-15 19:57:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:19,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:57:19,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:19,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393059986] [2021-10-15 19:57:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393059986] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:19,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:19,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:19,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34140961] [2021-10-15 19:57:19,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:19,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:19,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:19,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:19,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:19,351 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 243 transitions, 816 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:19,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:19,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:19,901 INFO L129 PetriNetUnfolder]: 181/708 cut-off events. [2021-10-15 19:57:19,901 INFO L130 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2021-10-15 19:57:19,902 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1675 conditions, 708 events. 181/708 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1552 event pairs, 0 based on Foata normal form. 37/745 useless extension candidates. Maximal degree in co-relation 646. Up to 364 conditions per place. [2021-10-15 19:57:19,907 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 349 selfloop transitions, 87 changer transitions 0/442 dead transitions. [2021-10-15 19:57:19,907 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 442 transitions, 2302 flow [2021-10-15 19:57:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:57:19,914 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:57:19,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:57:19,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:57:19,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:19,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:57:19,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,925 INFO L186 Difference]: Start difference. First operand has 199 places, 243 transitions, 816 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:57:19,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 442 transitions, 2302 flow [2021-10-15 19:57:19,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 442 transitions, 2120 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:19,958 INFO L242 Difference]: Finished difference. Result has 141 places, 315 transitions, 1532 flow [2021-10-15 19:57:19,959 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1532, PETRI_PLACES=141, PETRI_TRANSITIONS=315} [2021-10-15 19:57:19,965 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -54 predicate places. [2021-10-15 19:57:19,966 INFO L470 AbstractCegarLoop]: Abstraction has has 141 places, 315 transitions, 1532 flow [2021-10-15 19:57:19,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:19,966 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:19,966 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:19,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:57:19,967 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:19,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:19,968 INFO L82 PathProgramCache]: Analyzing trace with hash -951101936, now seen corresponding path program 1 times [2021-10-15 19:57:19,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:19,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921977442] [2021-10-15 19:57:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:19,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-15 19:57:20,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:20,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921977442] [2021-10-15 19:57:20,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921977442] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:20,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:20,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:20,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148830703] [2021-10-15 19:57:20,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:20,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:20,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:20,070 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:20,071 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 315 transitions, 1532 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:20,071 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:20,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:20,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:20,702 INFO L129 PetriNetUnfolder]: 254/1043 cut-off events. [2021-10-15 19:57:20,703 INFO L130 PetriNetUnfolder]: For 564/564 co-relation queries the response was YES. [2021-10-15 19:57:20,704 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2691 conditions, 1043 events. 254/1043 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3215 event pairs, 0 based on Foata normal form. 36/1079 useless extension candidates. Maximal degree in co-relation 1151. Up to 745 conditions per place. [2021-10-15 19:57:20,712 INFO L132 encePairwiseOnDemand]: 259/327 looper letters, 409 selfloop transitions, 100 changer transitions 0/515 dead transitions. [2021-10-15 19:57:20,713 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 515 transitions, 3300 flow [2021-10-15 19:57:20,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:57:20,715 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:57:20,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:57:20,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:57:20,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:20,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:57:20,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:20,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:20,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:20,722 INFO L186 Difference]: Start difference. First operand has 141 places, 315 transitions, 1532 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:57:20,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 515 transitions, 3300 flow [2021-10-15 19:57:20,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 515 transitions, 3068 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:20,775 INFO L242 Difference]: Finished difference. Result has 143 places, 388 transitions, 2366 flow [2021-10-15 19:57:20,776 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2366, PETRI_PLACES=143, PETRI_TRANSITIONS=388} [2021-10-15 19:57:20,776 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -52 predicate places. [2021-10-15 19:57:20,777 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 388 transitions, 2366 flow [2021-10-15 19:57:20,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:20,777 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:20,778 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:57:20,778 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:20,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1921921286, now seen corresponding path program 1 times [2021-10-15 19:57:20,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:20,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025605122] [2021-10-15 19:57:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:20,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:20,880 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 19:57:20,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:20,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025605122] [2021-10-15 19:57:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025605122] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:20,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:57:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-15 19:57:20,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512535585] [2021-10-15 19:57:20,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:20,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:20,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:57:20,890 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:20,891 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 388 transitions, 2366 flow. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 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) [2021-10-15 19:57:20,891 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:20,891 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:20,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:21,543 INFO L129 PetriNetUnfolder]: 242/1031 cut-off events. [2021-10-15 19:57:21,544 INFO L130 PetriNetUnfolder]: For 937/937 co-relation queries the response was YES. [2021-10-15 19:57:21,545 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2804 conditions, 1031 events. 242/1031 cut-off events. For 937/937 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3149 event pairs, 0 based on Foata normal form. 12/1043 useless extension candidates. Maximal degree in co-relation 1125. Up to 611 conditions per place. [2021-10-15 19:57:21,552 INFO L132 encePairwiseOnDemand]: 288/327 looper letters, 376 selfloop transitions, 121 changer transitions 0/503 dead transitions. [2021-10-15 19:57:21,552 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 503 transitions, 3524 flow [2021-10-15 19:57:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:21,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2021-10-15 19:57:21,555 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38022426095820594 [2021-10-15 19:57:21,555 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2021-10-15 19:57:21,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2021-10-15 19:57:21,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:21,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2021-10-15 19:57:21,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:21,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:21,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:21,562 INFO L186 Difference]: Start difference. First operand has 143 places, 388 transitions, 2366 flow. Second operand 3 states and 373 transitions. [2021-10-15 19:57:21,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 503 transitions, 3524 flow [2021-10-15 19:57:21,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 503 transitions, 3196 flow, removed 66 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:21,615 INFO L242 Difference]: Finished difference. Result has 143 places, 376 transitions, 2190 flow [2021-10-15 19:57:21,615 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2190, PETRI_PLACES=143, PETRI_TRANSITIONS=376} [2021-10-15 19:57:21,616 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -52 predicate places. [2021-10-15 19:57:21,616 INFO L470 AbstractCegarLoop]: Abstraction has has 143 places, 376 transitions, 2190 flow [2021-10-15 19:57:21,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 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) [2021-10-15 19:57:21,616 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:21,617 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:21,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:57:21,617 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash -680769074, now seen corresponding path program 1 times [2021-10-15 19:57:21,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:21,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813016778] [2021-10-15 19:57:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:21,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-15 19:57:21,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:21,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813016778] [2021-10-15 19:57:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813016778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:21,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347052941] [2021-10-15 19:57:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:21,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:21,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:21,712 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:21,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 19:57:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:57:22,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347052941] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:22,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:22,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:22,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30305770] [2021-10-15 19:57:22,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:22,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:22,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:22,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:22,373 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:22,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 376 transitions, 2190 flow. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:22,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:22,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:22,373 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:23,013 INFO L129 PetriNetUnfolder]: 181/970 cut-off events. [2021-10-15 19:57:23,014 INFO L130 PetriNetUnfolder]: For 766/766 co-relation queries the response was YES. [2021-10-15 19:57:23,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2448 conditions, 970 events. 181/970 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 3090 event pairs, 0 based on Foata normal form. 61/1031 useless extension candidates. Maximal degree in co-relation 1359. Up to 675 conditions per place. [2021-10-15 19:57:23,021 INFO L132 encePairwiseOnDemand]: 266/327 looper letters, 400 selfloop transitions, 36 changer transitions 0/442 dead transitions. [2021-10-15 19:57:23,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 442 transitions, 2812 flow [2021-10-15 19:57:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:23,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2021-10-15 19:57:23,025 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4057084607543323 [2021-10-15 19:57:23,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2021-10-15 19:57:23,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2021-10-15 19:57:23,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:23,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2021-10-15 19:57:23,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:23,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:23,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:23,032 INFO L186 Difference]: Start difference. First operand has 143 places, 376 transitions, 2190 flow. Second operand 3 states and 398 transitions. [2021-10-15 19:57:23,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 442 transitions, 2812 flow [2021-10-15 19:57:23,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 442 transitions, 2731 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:57:23,057 INFO L242 Difference]: Finished difference. Result has 144 places, 315 transitions, 1677 flow [2021-10-15 19:57:23,058 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1677, PETRI_PLACES=144, PETRI_TRANSITIONS=315} [2021-10-15 19:57:23,058 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -51 predicate places. [2021-10-15 19:57:23,058 INFO L470 AbstractCegarLoop]: Abstraction has has 144 places, 315 transitions, 1677 flow [2021-10-15 19:57:23,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 3 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:23,059 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:23,059 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:23,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:23,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:23,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203348, now seen corresponding path program 1 times [2021-10-15 19:57:23,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:23,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038745619] [2021-10-15 19:57:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:23,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-15 19:57:23,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:23,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038745619] [2021-10-15 19:57:23,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038745619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:23,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280212670] [2021-10-15 19:57:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:23,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:23,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:23,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 19:57:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:23,956 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-15 19:57:23,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280212670] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:23,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:23,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-10-15 19:57:23,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472898036] [2021-10-15 19:57:23,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:23,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 19:57:23,960 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:23,961 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 315 transitions, 1677 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:23,961 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:23,961 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:23,961 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:24,658 INFO L129 PetriNetUnfolder]: 265/1709 cut-off events. [2021-10-15 19:57:24,659 INFO L130 PetriNetUnfolder]: For 851/851 co-relation queries the response was YES. [2021-10-15 19:57:24,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4193 conditions, 1709 events. 265/1709 cut-off events. For 851/851 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 7744 event pairs, 0 based on Foata normal form. 73/1782 useless extension candidates. Maximal degree in co-relation 2681. Up to 920 conditions per place. [2021-10-15 19:57:24,670 INFO L132 encePairwiseOnDemand]: 260/327 looper letters, 382 selfloop transitions, 138 changer transitions 0/526 dead transitions. [2021-10-15 19:57:24,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 526 transitions, 3625 flow [2021-10-15 19:57:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:24,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 416 transitions. [2021-10-15 19:57:24,673 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4240570846075433 [2021-10-15 19:57:24,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 416 transitions. [2021-10-15 19:57:24,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 416 transitions. [2021-10-15 19:57:24,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:24,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 416 transitions. [2021-10-15 19:57:24,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:24,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:24,680 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:24,680 INFO L186 Difference]: Start difference. First operand has 144 places, 315 transitions, 1677 flow. Second operand 3 states and 416 transitions. [2021-10-15 19:57:24,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 526 transitions, 3625 flow [2021-10-15 19:57:24,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 526 transitions, 3578 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:57:24,703 INFO L242 Difference]: Finished difference. Result has 147 places, 399 transitions, 3072 flow [2021-10-15 19:57:24,704 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3072, PETRI_PLACES=147, PETRI_TRANSITIONS=399} [2021-10-15 19:57:24,705 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -48 predicate places. [2021-10-15 19:57:24,707 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 399 transitions, 3072 flow [2021-10-15 19:57:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:24,710 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:57:24,711 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:57:24,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:24,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:24,937 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:57:24,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:57:24,937 INFO L82 PathProgramCache]: Analyzing trace with hash 260334142, now seen corresponding path program 1 times [2021-10-15 19:57:24,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:57:24,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864208554] [2021-10-15 19:57:24,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:24,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:57:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:57:25,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:57:25,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864208554] [2021-10-15 19:57:25,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864208554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 19:57:25,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113693686] [2021-10-15 19:57:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:57:25,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:25,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:57:25,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 19:57:25,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 19:57:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:57:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:57:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:57:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:57:25,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113693686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:57:25,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 19:57:25,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-10-15 19:57:25,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130171729] [2021-10-15 19:57:25,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:57:25,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:57:25,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:57:25,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 19:57:25,832 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 327 [2021-10-15 19:57:25,833 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 399 transitions, 3072 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:25,833 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:57:25,833 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 327 [2021-10-15 19:57:25,833 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:57:26,674 INFO L129 PetriNetUnfolder]: 319/2154 cut-off events. [2021-10-15 19:57:26,675 INFO L130 PetriNetUnfolder]: For 2326/2326 co-relation queries the response was YES. [2021-10-15 19:57:26,677 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2154 events. 319/2154 cut-off events. For 2326/2326 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 10958 event pairs, 0 based on Foata normal form. 1/2155 useless extension candidates. Maximal degree in co-relation 2923. Up to 1176 conditions per place. [2021-10-15 19:57:26,680 INFO L132 encePairwiseOnDemand]: 275/327 looper letters, 0 selfloop transitions, 0 changer transitions 578/578 dead transitions. [2021-10-15 19:57:26,680 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 578 transitions, 5077 flow [2021-10-15 19:57:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:57:26,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:57:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2021-10-15 19:57:26,683 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.38634046890927626 [2021-10-15 19:57:26,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2021-10-15 19:57:26,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2021-10-15 19:57:26,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:57:26,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2021-10-15 19:57:26,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:26,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:26,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:26,690 INFO L186 Difference]: Start difference. First operand has 147 places, 399 transitions, 3072 flow. Second operand 3 states and 379 transitions. [2021-10-15 19:57:26,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 578 transitions, 5077 flow [2021-10-15 19:57:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 578 transitions, 4749 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:57:26,713 INFO L242 Difference]: Finished difference. Result has 145 places, 0 transitions, 0 flow [2021-10-15 19:57:26,713 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=145, PETRI_TRANSITIONS=0} [2021-10-15 19:57:26,714 INFO L334 CegarLoopForPetriNet]: 195 programPoint places, -50 predicate places. [2021-10-15 19:57:26,714 INFO L470 AbstractCegarLoop]: Abstraction has has 145 places, 0 transitions, 0 flow [2021-10-15 19:57:26,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:57:26,717 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:57:26,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:57:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 19:57:26,948 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:57:26,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:57:26 BoogieIcfgContainer [2021-10-15 19:57:26,952 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:57:26,953 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:57:26,953 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:57:26,953 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:57:26,954 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:57:17" (3/4) ... [2021-10-15 19:57:26,957 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-15 19:57:26,988 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-15 19:57:26,989 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-15 19:57:26,991 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:26,992 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-15 19:57:27,144 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:57:27,144 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:57:27,146 INFO L168 Benchmark]: Toolchain (without parser) took 11751.65 ms. Allocated memory was 107.0 MB in the beginning and 228.6 MB in the end (delta: 121.6 MB). Free memory was 76.2 MB in the beginning and 144.0 MB in the end (delta: -67.8 MB). Peak memory consumption was 53.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,146 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:57:27,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.07 ms. Allocated memory is still 107.0 MB. Free memory was 76.0 MB in the beginning and 65.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,147 INFO L168 Benchmark]: Boogie Procedure Inliner took 105.77 ms. Allocated memory is still 107.0 MB. Free memory was 65.3 MB in the beginning and 59.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,147 INFO L168 Benchmark]: Boogie Preprocessor took 122.04 ms. Allocated memory is still 107.0 MB. Free memory was 59.8 MB in the beginning and 55.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,148 INFO L168 Benchmark]: RCFGBuilder took 1160.76 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 55.2 MB in the beginning and 91.6 MB in the end (delta: -36.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,148 INFO L168 Benchmark]: TraceAbstraction took 9538.49 ms. Allocated memory was 130.0 MB in the beginning and 228.6 MB in the end (delta: 98.6 MB). Free memory was 90.8 MB in the beginning and 158.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 134.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,149 INFO L168 Benchmark]: Witness Printer took 191.15 ms. Allocated memory is still 228.6 MB. Free memory was 158.1 MB in the beginning and 144.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:57:27,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 107.0 MB. Free memory is still 60.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 623.07 ms. Allocated memory is still 107.0 MB. Free memory was 76.0 MB in the beginning and 65.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 105.77 ms. Allocated memory is still 107.0 MB. Free memory was 65.3 MB in the beginning and 59.8 MB in the end (delta: 5.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 122.04 ms. Allocated memory is still 107.0 MB. Free memory was 59.8 MB in the beginning and 55.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1160.76 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 55.2 MB in the beginning and 91.6 MB in the end (delta: -36.4 MB). Peak memory consumption was 18.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9538.49 ms. Allocated memory was 130.0 MB in the beginning and 228.6 MB in the end (delta: 98.6 MB). Free memory was 90.8 MB in the beginning and 158.1 MB in the end (delta: -67.3 MB). Peak memory consumption was 134.0 MB. Max. memory is 16.1 GB. * Witness Printer took 191.15 ms. Allocated memory is still 228.6 MB. Free memory was 158.1 MB in the beginning and 144.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 531]: 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 CFG has 1 procedures, 198 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 27.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 9475.1ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 5320.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 159.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 536 SDtfs, 455 SDslu, 0 SDs, 0 SdLazy, 2359 SolverSat, 436 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2238.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 529 GetRequests, 515 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3072occurred in iteration=6, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 177.7ms SsaConstructionTime, 476.2ms SatisfiabilityAnalysisTime, 2109.6ms InterpolantComputationTime, 1564 NumberOfCodeBlocks, 1564 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 1554 ConstructedInterpolants, 0 QuantifiedInterpolants, 3672 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1011 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 486/495 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! [2021-10-15 19:57:27,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_740467f0-b0b6-4043-a662-ec4bbfda67bb/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...