./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G --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 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:17:12,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:17:12,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:17:12,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:17:12,131 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:17:12,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:17:12,134 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:17:12,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:17:12,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:17:12,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:17:12,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:17:12,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:17:12,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:17:12,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:17:12,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:17:12,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:17:12,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:17:12,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:17:12,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:17:12,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:17:12,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:17:12,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:17:12,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:17:12,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:17:12,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:17:12,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:17:12,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:17:12,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:17:12,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:17:12,170 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:17:12,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:17:12,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:17:12,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:17:12,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:17:12,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:17:12,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:17:12,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:17:12,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:17:12,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:17:12,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:17:12,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:17:12,180 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:17:12,205 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:17:12,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:17:12,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:17:12,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:17:12,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:17:12,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:17:12,208 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:17:12,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:17:12,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:17:12,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:17:12,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:17:12,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:17:12,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:17:12,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:17:12,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:17:12,212 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:17:12,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:17:12,213 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:17:12,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:17:12,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:17:12,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:17:12,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:17:12,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:17:12,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:17:12,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:17:12,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:17:12,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:17:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:17:12,217 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:17:12,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:17:12,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:17:12,218 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:17:12,218 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_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2021-11-23 14:17:12,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:17:12,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:17:12,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:17:12,504 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:17:12,505 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:17:12,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2021-11-23 14:17:12,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/data/5068ca5c8/20cad5b4fc31497db5fb3c9ebac23f79/FLAG311567aac [2021-11-23 14:17:13,122 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:17:13,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/sv-benchmarks/c/pthread/triangular-longer-1.i [2021-11-23 14:17:13,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/data/5068ca5c8/20cad5b4fc31497db5fb3c9ebac23f79/FLAG311567aac [2021-11-23 14:17:13,413 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/data/5068ca5c8/20cad5b4fc31497db5fb3c9ebac23f79 [2021-11-23 14:17:13,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:17:13,417 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:17:13,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:17:13,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:17:13,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:17:13,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8bdd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13, skipping insertion in model container [2021-11-23 14:17:13,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:17:13,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:17:13,820 WARN L230 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_87160b9c-0541-4d41-9f66-b48b6e257e45/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-11-23 14:17:13,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:17:13,834 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:17:13,900 WARN L230 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_87160b9c-0541-4d41-9f66-b48b6e257e45/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-11-23 14:17:13,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:17:13,933 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:17:13,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13 WrapperNode [2021-11-23 14:17:13,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:17:13,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:17:13,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:17:13,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:17:13,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:13,999 INFO L137 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-11-23 14:17:13,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:17:14,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:17:14,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:17:14,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:17:14,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,011 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:17:14,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:17:14,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:17:14,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:17:14,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (1/1) ... [2021-11-23 14:17:14,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:17:14,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:14,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:17:14,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:17:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-23 14:17:14,130 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-23 14:17:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-23 14:17:14,130 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-23 14:17:14,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-23 14:17:14,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:17:14,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:17:14,133 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-23 14:17:14,238 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:17:14,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:17:14,383 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:17:14,390 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:17:14,391 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 14:17:14,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:14 BoogieIcfgContainer [2021-11-23 14:17:14,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:17:14,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:17:14,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:17:14,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:17:14,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:17:13" (1/3) ... [2021-11-23 14:17:14,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b53bb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:14, skipping insertion in model container [2021-11-23 14:17:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:17:13" (2/3) ... [2021-11-23 14:17:14,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b53bb9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:17:14, skipping insertion in model container [2021-11-23 14:17:14,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:14" (3/3) ... [2021-11-23 14:17:14,402 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-11-23 14:17:14,407 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-23 14:17:14,408 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:17:14,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:17:14,408 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-23 14:17:14,440 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,440 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,441 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,441 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,441 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,441 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,442 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,442 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,442 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,442 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,443 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,443 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,443 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,444 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,444 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,444 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,445 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,445 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,445 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,446 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,446 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,446 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,446 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,446 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,447 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,447 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,447 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,448 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,448 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,448 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,448 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,449 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,449 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,449 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,450 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,450 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,450 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,450 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,451 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,452 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,453 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,453 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,453 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,454 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,454 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,454 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,455 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,455 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,458 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,458 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,459 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,459 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,459 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,463 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,463 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,463 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,464 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-23 14:17:14,465 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-23 14:17:14,519 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:17:14,526 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:17:14,526 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 14:17:14,539 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2021-11-23 14:17:14,588 INFO L129 PetriNetUnfolder]: 5/68 cut-off events. [2021-11-23 14:17:14,588 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:17:14,593 INFO L84 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2021-11-23 14:17:14,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2021-11-23 14:17:14,598 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2021-11-23 14:17:14,619 INFO L129 PetriNetUnfolder]: 4/58 cut-off events. [2021-11-23 14:17:14,619 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-23 14:17:14,619 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:14,620 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] [2021-11-23 14:17:14,621 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:14,626 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2021-11-23 14:17:14,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:14,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217693972] [2021-11-23 14:17:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:14,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:14,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:15,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:15,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217693972] [2021-11-23 14:17:15,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217693972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:15,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:15,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:17:15,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418189480] [2021-11-23 14:17:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:15,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:17:15,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:15,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:17:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:17:15,152 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:15,156 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,156 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:15,157 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:15,158 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:15,343 INFO L129 PetriNetUnfolder]: 42/210 cut-off events. [2021-11-23 14:17:15,343 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-23 14:17:15,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 290 conditions, 210 events. 42/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 816 event pairs, 3 based on Foata normal form. 46/240 useless extension candidates. Maximal degree in co-relation 257. Up to 28 conditions per place. [2021-11-23 14:17:15,349 INFO L132 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2021-11-23 14:17:15,349 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2021-11-23 14:17:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 14:17:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-11-23 14:17:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2021-11-23 14:17:15,385 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2021-11-23 14:17:15,386 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2021-11-23 14:17:15,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2021-11-23 14:17:15,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:15,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2021-11-23 14:17:15,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,414 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,416 INFO L186 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2021-11-23 14:17:15,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2021-11-23 14:17:15,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-23 14:17:15,432 INFO L242 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2021-11-23 14:17:15,434 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2021-11-23 14:17:15,440 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2021-11-23 14:17:15,441 INFO L470 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2021-11-23 14:17:15,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,441 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:15,442 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] [2021-11-23 14:17:15,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:17:15,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2021-11-23 14:17:15,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:15,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151941785] [2021-11-23 14:17:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:15,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:15,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:15,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151941785] [2021-11-23 14:17:15,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151941785] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:15,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:15,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:17:15,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120290906] [2021-11-23 14:17:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:15,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:17:15,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:17:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:17:15,713 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:15,714 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,714 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:15,714 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:15,715 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:15,893 INFO L129 PetriNetUnfolder]: 46/218 cut-off events. [2021-11-23 14:17:15,893 INFO L130 PetriNetUnfolder]: For 111/114 co-relation queries the response was YES. [2021-11-23 14:17:15,896 INFO L84 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 218 events. 46/218 cut-off events. For 111/114 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 848 event pairs, 0 based on Foata normal form. 3/205 useless extension candidates. Maximal degree in co-relation 377. Up to 35 conditions per place. [2021-11-23 14:17:15,897 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2021-11-23 14:17:15,898 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2021-11-23 14:17:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 14:17:15,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-11-23 14:17:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2021-11-23 14:17:15,900 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2021-11-23 14:17:15,900 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2021-11-23 14:17:15,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2021-11-23 14:17:15,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:15,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2021-11-23 14:17:15,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,906 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,906 INFO L186 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2021-11-23 14:17:15,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2021-11-23 14:17:15,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-23 14:17:15,915 INFO L242 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2021-11-23 14:17:15,916 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2021-11-23 14:17:15,917 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-11-23 14:17:15,917 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2021-11-23 14:17:15,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:15,918 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:15,918 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] [2021-11-23 14:17:15,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:17:15,919 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:15,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2021-11-23 14:17:15,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:15,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885955262] [2021-11-23 14:17:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:15,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:16,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885955262] [2021-11-23 14:17:16,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885955262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:16,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:16,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:17:16,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747790328] [2021-11-23 14:17:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:16,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:17:16,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:17:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:17:16,069 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:16,070 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:16,071 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:16,071 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:16,166 INFO L129 PetriNetUnfolder]: 37/188 cut-off events. [2021-11-23 14:17:16,166 INFO L130 PetriNetUnfolder]: For 251/258 co-relation queries the response was YES. [2021-11-23 14:17:16,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 188 events. 37/188 cut-off events. For 251/258 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 602 event pairs, 0 based on Foata normal form. 10/180 useless extension candidates. Maximal degree in co-relation 354. Up to 35 conditions per place. [2021-11-23 14:17:16,169 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2021-11-23 14:17:16,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2021-11-23 14:17:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:17:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-23 14:17:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2021-11-23 14:17:16,172 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2021-11-23 14:17:16,173 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2021-11-23 14:17:16,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2021-11-23 14:17:16,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:16,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2021-11-23 14:17:16,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,178 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,179 INFO L186 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2021-11-23 14:17:16,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2021-11-23 14:17:16,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2021-11-23 14:17:16,185 INFO L242 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2021-11-23 14:17:16,185 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2021-11-23 14:17:16,186 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2021-11-23 14:17:16,186 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2021-11-23 14:17:16,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,187 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:16,187 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] [2021-11-23 14:17:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 14:17:16,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2021-11-23 14:17:16,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712407333] [2021-11-23 14:17:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:16,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:16,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:16,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712407333] [2021-11-23 14:17:16,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712407333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:16,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:16,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 14:17:16,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880153246] [2021-11-23 14:17:16,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 14:17:16,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 14:17:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 14:17:16,286 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:16,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:16,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:16,287 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:16,412 INFO L129 PetriNetUnfolder]: 30/177 cut-off events. [2021-11-23 14:17:16,412 INFO L130 PetriNetUnfolder]: For 232/248 co-relation queries the response was YES. [2021-11-23 14:17:16,414 INFO L84 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 177 events. 30/177 cut-off events. For 232/248 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 550 event pairs, 0 based on Foata normal form. 16/176 useless extension candidates. Maximal degree in co-relation 365. Up to 32 conditions per place. [2021-11-23 14:17:16,415 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 12 changer transitions 11/87 dead transitions. [2021-11-23 14:17:16,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 87 transitions, 487 flow [2021-11-23 14:17:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:17:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-23 14:17:16,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 524 transitions. [2021-11-23 14:17:16,419 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8317460317460318 [2021-11-23 14:17:16,419 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 524 transitions. [2021-11-23 14:17:16,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 524 transitions. [2021-11-23 14:17:16,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:16,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 524 transitions. [2021-11-23 14:17:16,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.22222222222222) internal successors, (524), 9 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,425 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,425 INFO L186 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 9 states and 524 transitions. [2021-11-23 14:17:16,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 87 transitions, 487 flow [2021-11-23 14:17:16,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 467 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-11-23 14:17:16,432 INFO L242 Difference]: Finished difference. Result has 93 places, 73 transitions, 332 flow [2021-11-23 14:17:16,433 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=332, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2021-11-23 14:17:16,434 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 23 predicate places. [2021-11-23 14:17:16,434 INFO L470 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 332 flow [2021-11-23 14:17:16,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,434 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:16,435 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] [2021-11-23 14:17:16,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 14:17:16,435 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:16,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:16,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1734522485, now seen corresponding path program 1 times [2021-11-23 14:17:16,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:16,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586892251] [2021-11-23 14:17:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:16,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:16,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586892251] [2021-11-23 14:17:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586892251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:16,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:16,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 14:17:16,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746101467] [2021-11-23 14:17:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:16,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:17:16,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:17:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:17:16,579 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:16,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:16,581 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:16,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:16,774 INFO L129 PetriNetUnfolder]: 32/173 cut-off events. [2021-11-23 14:17:16,774 INFO L130 PetriNetUnfolder]: For 432/450 co-relation queries the response was YES. [2021-11-23 14:17:16,776 INFO L84 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 173 events. 32/173 cut-off events. For 432/450 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 519 event pairs, 1 based on Foata normal form. 15/173 useless extension candidates. Maximal degree in co-relation 404. Up to 36 conditions per place. [2021-11-23 14:17:16,777 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 19 selfloop transitions, 19 changer transitions 8/91 dead transitions. [2021-11-23 14:17:16,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 91 transitions, 584 flow [2021-11-23 14:17:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 14:17:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-11-23 14:17:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2021-11-23 14:17:16,781 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-11-23 14:17:16,781 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2021-11-23 14:17:16,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2021-11-23 14:17:16,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:16,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2021-11-23 14:17:16,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,787 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,787 INFO L186 Difference]: Start difference. First operand has 93 places, 73 transitions, 332 flow. Second operand 11 states and 638 transitions. [2021-11-23 14:17:16,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 91 transitions, 584 flow [2021-11-23 14:17:16,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 498 flow, removed 30 selfloop flow, removed 10 redundant places. [2021-11-23 14:17:16,796 INFO L242 Difference]: Finished difference. Result has 96 places, 77 transitions, 390 flow [2021-11-23 14:17:16,797 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=390, PETRI_PLACES=96, PETRI_TRANSITIONS=77} [2021-11-23 14:17:16,800 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2021-11-23 14:17:16,800 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 77 transitions, 390 flow [2021-11-23 14:17:16,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,800 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:16,802 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] [2021-11-23 14:17:16,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 14:17:16,803 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -949175033, now seen corresponding path program 2 times [2021-11-23 14:17:16,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:16,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940424493] [2021-11-23 14:17:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:16,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:16,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:16,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940424493] [2021-11-23 14:17:16,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940424493] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:16,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:17:16,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 14:17:16,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695284122] [2021-11-23 14:17:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:16,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 14:17:16,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 14:17:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 14:17:16,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:16,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 77 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:16,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:16,966 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:16,966 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:17,147 INFO L129 PetriNetUnfolder]: 33/189 cut-off events. [2021-11-23 14:17:17,147 INFO L130 PetriNetUnfolder]: For 497/515 co-relation queries the response was YES. [2021-11-23 14:17:17,149 INFO L84 FinitePrefix]: Finished finitePrefix Result has 514 conditions, 189 events. 33/189 cut-off events. For 497/515 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 665 event pairs, 0 based on Foata normal form. 16/188 useless extension candidates. Maximal degree in co-relation 473. Up to 38 conditions per place. [2021-11-23 14:17:17,151 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 22 selfloop transitions, 17 changer transitions 5/89 dead transitions. [2021-11-23 14:17:17,151 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 604 flow [2021-11-23 14:17:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 14:17:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-23 14:17:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2021-11-23 14:17:17,154 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-11-23 14:17:17,155 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2021-11-23 14:17:17,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2021-11-23 14:17:17,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:17,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2021-11-23 14:17:17,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,163 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 70.0) internal successors, (910), 13 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,164 INFO L186 Difference]: Start difference. First operand has 96 places, 77 transitions, 390 flow. Second operand 12 states and 695 transitions. [2021-11-23 14:17:17,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 604 flow [2021-11-23 14:17:17,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 89 transitions, 563 flow, removed 12 selfloop flow, removed 6 redundant places. [2021-11-23 14:17:17,178 INFO L242 Difference]: Finished difference. Result has 102 places, 80 transitions, 442 flow [2021-11-23 14:17:17,178 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=442, PETRI_PLACES=102, PETRI_TRANSITIONS=80} [2021-11-23 14:17:17,182 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 32 predicate places. [2021-11-23 14:17:17,182 INFO L470 AbstractCegarLoop]: Abstraction has has 102 places, 80 transitions, 442 flow [2021-11-23 14:17:17,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,183 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:17,184 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] [2021-11-23 14:17:17,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 14:17:17,185 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:17,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1110018853, now seen corresponding path program 1 times [2021-11-23 14:17:17,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932704857] [2021-11-23 14:17:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:17,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932704857] [2021-11-23 14:17:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932704857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848133522] [2021-11-23 14:17:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:17,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:17,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:17,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:17,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:17:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:17,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 14:17:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:17,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:17,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848133522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:17,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:17,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2021-11-23 14:17:17,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037788442] [2021-11-23 14:17:17,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:17,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 14:17:17,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 14:17:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-23 14:17:17,956 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:17,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 80 transitions, 442 flow. Second operand has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:17,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:17,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:17,957 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:18,294 INFO L129 PetriNetUnfolder]: 51/288 cut-off events. [2021-11-23 14:17:18,294 INFO L130 PetriNetUnfolder]: For 900/931 co-relation queries the response was YES. [2021-11-23 14:17:18,296 INFO L84 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 288 events. 51/288 cut-off events. For 900/931 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1073 event pairs, 1 based on Foata normal form. 19/279 useless extension candidates. Maximal degree in co-relation 752. Up to 60 conditions per place. [2021-11-23 14:17:18,299 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 26 selfloop transitions, 34 changer transitions 14/119 dead transitions. [2021-11-23 14:17:18,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 119 transitions, 1052 flow [2021-11-23 14:17:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 14:17:18,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-11-23 14:17:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2021-11-23 14:17:18,304 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2021-11-23 14:17:18,304 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2021-11-23 14:17:18,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2021-11-23 14:17:18,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:18,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2021-11-23 14:17:18,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:18,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:18,327 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:18,327 INFO L186 Difference]: Start difference. First operand has 102 places, 80 transitions, 442 flow. Second operand 20 states and 1159 transitions. [2021-11-23 14:17:18,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 119 transitions, 1052 flow [2021-11-23 14:17:18,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 119 transitions, 1016 flow, removed 10 selfloop flow, removed 7 redundant places. [2021-11-23 14:17:18,335 INFO L242 Difference]: Finished difference. Result has 122 places, 96 transitions, 736 flow [2021-11-23 14:17:18,336 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=736, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2021-11-23 14:17:18,336 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 52 predicate places. [2021-11-23 14:17:18,336 INFO L470 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 736 flow [2021-11-23 14:17:18,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 56.61538461538461) internal successors, (736), 13 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:18,337 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:18,337 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:18,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:18,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:18,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash 936563082, now seen corresponding path program 1 times [2021-11-23 14:17:18,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:18,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680236436] [2021-11-23 14:17:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:18,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:18,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:18,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680236436] [2021-11-23 14:17:18,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680236436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415482759] [2021-11-23 14:17:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:18,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:18,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:18,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:17:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:18,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 14:17:18,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:18,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:19,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415482759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:19,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:19,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-23 14:17:19,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266261719] [2021-11-23 14:17:19,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:19,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 14:17:19,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 14:17:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-23 14:17:19,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:19,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 736 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,365 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:19,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:19,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:19,779 INFO L129 PetriNetUnfolder]: 73/413 cut-off events. [2021-11-23 14:17:19,779 INFO L130 PetriNetUnfolder]: For 2658/2717 co-relation queries the response was YES. [2021-11-23 14:17:19,782 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 413 events. 73/413 cut-off events. For 2658/2717 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1616 event pairs, 0 based on Foata normal form. 23/395 useless extension candidates. Maximal degree in co-relation 1341. Up to 96 conditions per place. [2021-11-23 14:17:19,788 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 55 selfloop transitions, 25 changer transitions 26/151 dead transitions. [2021-11-23 14:17:19,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 151 transitions, 1856 flow [2021-11-23 14:17:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 14:17:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-11-23 14:17:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2021-11-23 14:17:19,795 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2021-11-23 14:17:19,795 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2021-11-23 14:17:19,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2021-11-23 14:17:19,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:19,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2021-11-23 14:17:19,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,810 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,810 INFO L186 Difference]: Start difference. First operand has 122 places, 96 transitions, 736 flow. Second operand 25 states and 1450 transitions. [2021-11-23 14:17:19,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 151 transitions, 1856 flow [2021-11-23 14:17:19,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 151 transitions, 1453 flow, removed 180 selfloop flow, removed 13 redundant places. [2021-11-23 14:17:19,828 INFO L242 Difference]: Finished difference. Result has 147 places, 110 transitions, 841 flow [2021-11-23 14:17:19,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=841, PETRI_PLACES=147, PETRI_TRANSITIONS=110} [2021-11-23 14:17:19,831 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 77 predicate places. [2021-11-23 14:17:19,831 INFO L470 AbstractCegarLoop]: Abstraction has has 147 places, 110 transitions, 841 flow [2021-11-23 14:17:19,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:19,832 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:19,832 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:19,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:20,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 14:17:20,055 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:20,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2046027908, now seen corresponding path program 2 times [2021-11-23 14:17:20,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469795807] [2021-11-23 14:17:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:20,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:20,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:20,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469795807] [2021-11-23 14:17:20,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469795807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:20,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429474759] [2021-11-23 14:17:20,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:17:20,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:20,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:20,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:17:20,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:17:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 14:17:20,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:20,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429474759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:20,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:20,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-23 14:17:20,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057062899] [2021-11-23 14:17:20,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:20,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 14:17:20,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 14:17:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-23 14:17:20,763 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:20,765 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 110 transitions, 841 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:20,765 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:20,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:20,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:21,442 INFO L129 PetriNetUnfolder]: 129/779 cut-off events. [2021-11-23 14:17:21,443 INFO L130 PetriNetUnfolder]: For 12717/12861 co-relation queries the response was YES. [2021-11-23 14:17:21,450 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3179 conditions, 779 events. 129/779 cut-off events. For 12717/12861 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4531 event pairs, 0 based on Foata normal form. 31/731 useless extension candidates. Maximal degree in co-relation 3104. Up to 160 conditions per place. [2021-11-23 14:17:21,458 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 58 selfloop transitions, 81 changer transitions 26/210 dead transitions. [2021-11-23 14:17:21,459 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 210 transitions, 3273 flow [2021-11-23 14:17:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 14:17:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 14:17:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1915 transitions. [2021-11-23 14:17:21,464 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.829004329004329 [2021-11-23 14:17:21,464 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1915 transitions. [2021-11-23 14:17:21,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1915 transitions. [2021-11-23 14:17:21,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:21,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1915 transitions. [2021-11-23 14:17:21,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 58.03030303030303) internal successors, (1915), 33 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:21,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:21,478 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:21,478 INFO L186 Difference]: Start difference. First operand has 147 places, 110 transitions, 841 flow. Second operand 33 states and 1915 transitions. [2021-11-23 14:17:21,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 210 transitions, 3273 flow [2021-11-23 14:17:21,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 210 transitions, 2697 flow, removed 280 selfloop flow, removed 13 redundant places. [2021-11-23 14:17:21,516 INFO L242 Difference]: Finished difference. Result has 180 places, 156 transitions, 1674 flow [2021-11-23 14:17:21,517 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=715, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1674, PETRI_PLACES=180, PETRI_TRANSITIONS=156} [2021-11-23 14:17:21,518 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 110 predicate places. [2021-11-23 14:17:21,518 INFO L470 AbstractCegarLoop]: Abstraction has has 180 places, 156 transitions, 1674 flow [2021-11-23 14:17:21,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:21,519 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:21,519 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:21,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:21,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:21,733 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:21,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2021-11-23 14:17:21,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:21,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654515805] [2021-11-23 14:17:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:21,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:21,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654515805] [2021-11-23 14:17:21,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654515805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382800503] [2021-11-23 14:17:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:17:21,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:21,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:21,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:17:21,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 14:17:21,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:21,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 14:17:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:22,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382800503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:22,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:22,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2021-11-23 14:17:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277592596] [2021-11-23 14:17:22,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:22,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 14:17:22,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 14:17:22,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-23 14:17:22,254 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:22,256 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 156 transitions, 1674 flow. Second operand has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:22,256 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:22,256 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:22,256 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:23,132 INFO L129 PetriNetUnfolder]: 167/1049 cut-off events. [2021-11-23 14:17:23,132 INFO L130 PetriNetUnfolder]: For 33425/33642 co-relation queries the response was YES. [2021-11-23 14:17:23,144 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5139 conditions, 1049 events. 167/1049 cut-off events. For 33425/33642 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 7171 event pairs, 0 based on Foata normal form. 44/987 useless extension candidates. Maximal degree in co-relation 5048. Up to 212 conditions per place. [2021-11-23 14:17:23,157 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 128 changer transitions 31/266 dead transitions. [2021-11-23 14:17:23,157 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 5247 flow [2021-11-23 14:17:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 14:17:23,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-23 14:17:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2085 transitions. [2021-11-23 14:17:23,162 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-11-23 14:17:23,163 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2085 transitions. [2021-11-23 14:17:23,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2085 transitions. [2021-11-23 14:17:23,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:23,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2085 transitions. [2021-11-23 14:17:23,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 57.916666666666664) internal successors, (2085), 36 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,177 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 70.0) internal successors, (2590), 37 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,177 INFO L186 Difference]: Start difference. First operand has 180 places, 156 transitions, 1674 flow. Second operand 36 states and 2085 transitions. [2021-11-23 14:17:23,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 5247 flow [2021-11-23 14:17:23,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 266 transitions, 4417 flow, removed 399 selfloop flow, removed 18 redundant places. [2021-11-23 14:17:23,307 INFO L242 Difference]: Finished difference. Result has 210 places, 203 transitions, 2651 flow [2021-11-23 14:17:23,308 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1374, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2651, PETRI_PLACES=210, PETRI_TRANSITIONS=203} [2021-11-23 14:17:23,309 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 140 predicate places. [2021-11-23 14:17:23,309 INFO L470 AbstractCegarLoop]: Abstraction has has 210 places, 203 transitions, 2651 flow [2021-11-23 14:17:23,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.64705882352941) internal successors, (963), 17 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:23,310 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:23,310 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:23,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:23,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 14:17:23,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1986094188, now seen corresponding path program 4 times [2021-11-23 14:17:23,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:23,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501868299] [2021-11-23 14:17:23,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:23,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:23,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:23,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501868299] [2021-11-23 14:17:23,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501868299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:23,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706881095] [2021-11-23 14:17:23,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:17:23,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:23,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:23,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:23,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 14:17:23,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:17:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 14:17:23,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:23,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:24,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706881095] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:24,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:24,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2021-11-23 14:17:24,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629025804] [2021-11-23 14:17:24,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:24,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 14:17:24,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 14:17:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:17:24,310 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:24,312 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 203 transitions, 2651 flow. Second operand has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:24,312 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:24,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:24,313 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:25,980 INFO L129 PetriNetUnfolder]: 264/1583 cut-off events. [2021-11-23 14:17:25,981 INFO L130 PetriNetUnfolder]: For 83404/83722 co-relation queries the response was YES. [2021-11-23 14:17:25,999 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9726 conditions, 1583 events. 264/1583 cut-off events. For 83404/83722 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 10977 event pairs, 1 based on Foata normal form. 57/1480 useless extension candidates. Maximal degree in co-relation 9623. Up to 330 conditions per place. [2021-11-23 14:17:26,023 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 71 selfloop transitions, 222 changer transitions 38/376 dead transitions. [2021-11-23 14:17:26,023 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 376 transitions, 10583 flow [2021-11-23 14:17:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 14:17:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-11-23 14:17:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3011 transitions. [2021-11-23 14:17:26,029 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8271978021978021 [2021-11-23 14:17:26,030 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3011 transitions. [2021-11-23 14:17:26,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3011 transitions. [2021-11-23 14:17:26,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:26,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3011 transitions. [2021-11-23 14:17:26,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.90384615384615) internal successors, (3011), 52 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,050 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,050 INFO L186 Difference]: Start difference. First operand has 210 places, 203 transitions, 2651 flow. Second operand 52 states and 3011 transitions. [2021-11-23 14:17:26,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 376 transitions, 10583 flow [2021-11-23 14:17:26,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 376 transitions, 8479 flow, removed 1021 selfloop flow, removed 21 redundant places. [2021-11-23 14:17:26,255 INFO L242 Difference]: Finished difference. Result has 263 places, 313 transitions, 5525 flow [2021-11-23 14:17:26,256 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5525, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2021-11-23 14:17:26,257 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 193 predicate places. [2021-11-23 14:17:26,257 INFO L470 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 5525 flow [2021-11-23 14:17:26,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.32) internal successors, (1408), 25 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:26,258 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:26,258 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:26,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:26,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:26,475 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -285761002, now seen corresponding path program 5 times [2021-11-23 14:17:26,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075211117] [2021-11-23 14:17:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:26,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:26,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075211117] [2021-11-23 14:17:26,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075211117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:26,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856884791] [2021-11-23 14:17:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:17:26,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:26,855 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:26,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:17:26,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 14:17:26,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 14:17:26,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:27,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856884791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:28,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 29 [2021-11-23 14:17:28,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944852562] [2021-11-23 14:17:28,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:28,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 14:17:28,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:28,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 14:17:28,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-11-23 14:17:28,252 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:28,255 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 5525 flow. Second operand has 29 states, 29 states have (on average 56.41379310344828) internal successors, (1636), 29 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:28,255 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:28,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:28,255 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:29,558 INFO L129 PetriNetUnfolder]: 274/1783 cut-off events. [2021-11-23 14:17:29,558 INFO L130 PetriNetUnfolder]: For 125477/125717 co-relation queries the response was YES. [2021-11-23 14:17:29,584 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11220 conditions, 1783 events. 274/1783 cut-off events. For 125477/125717 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 12222 event pairs, 0 based on Foata normal form. 28/1620 useless extension candidates. Maximal degree in co-relation 11094. Up to 372 conditions per place. [2021-11-23 14:17:29,614 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 271 selfloop transitions, 47 changer transitions 26/389 dead transitions. [2021-11-23 14:17:29,614 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 389 transitions, 10759 flow [2021-11-23 14:17:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 14:17:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-11-23 14:17:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2134 transitions. [2021-11-23 14:17:29,631 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8239382239382239 [2021-11-23 14:17:29,631 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2134 transitions. [2021-11-23 14:17:29,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2134 transitions. [2021-11-23 14:17:29,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:29,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2134 transitions. [2021-11-23 14:17:29,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.67567567567568) internal successors, (2134), 37 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,671 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:29,671 INFO L186 Difference]: Start difference. First operand has 263 places, 313 transitions, 5525 flow. Second operand 37 states and 2134 transitions. [2021-11-23 14:17:29,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 389 transitions, 10759 flow [2021-11-23 14:17:30,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 389 transitions, 7120 flow, removed 1795 selfloop flow, removed 20 redundant places. [2021-11-23 14:17:30,132 INFO L242 Difference]: Finished difference. Result has 285 places, 331 transitions, 4313 flow [2021-11-23 14:17:30,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3666, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=4313, PETRI_PLACES=285, PETRI_TRANSITIONS=331} [2021-11-23 14:17:30,135 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 215 predicate places. [2021-11-23 14:17:30,135 INFO L470 AbstractCegarLoop]: Abstraction has has 285 places, 331 transitions, 4313 flow [2021-11-23 14:17:30,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.41379310344828) internal successors, (1636), 29 states have internal predecessors, (1636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:30,136 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:30,136 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:30,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:30,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 14:17:30,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:30,352 INFO L85 PathProgramCache]: Analyzing trace with hash -41222864, now seen corresponding path program 6 times [2021-11-23 14:17:30,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:30,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541662893] [2021-11-23 14:17:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:30,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:30,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541662893] [2021-11-23 14:17:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541662893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:30,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52088340] [2021-11-23 14:17:30,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:17:30,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:30,684 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:30,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:17:30,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 14:17:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:30,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 14:17:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:31,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:31,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52088340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:31,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:31,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 31 [2021-11-23 14:17:31,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859972087] [2021-11-23 14:17:31,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:31,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 14:17:31,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:31,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 14:17:31,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2021-11-23 14:17:31,975 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:31,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 331 transitions, 4313 flow. Second operand has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:31,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:31,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:31,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:33,497 INFO L129 PetriNetUnfolder]: 332/2283 cut-off events. [2021-11-23 14:17:33,497 INFO L130 PetriNetUnfolder]: For 122462/122725 co-relation queries the response was YES. [2021-11-23 14:17:33,528 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11516 conditions, 2283 events. 332/2283 cut-off events. For 122462/122725 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 17055 event pairs, 0 based on Foata normal form. 42/2081 useless extension candidates. Maximal degree in co-relation 11384. Up to 340 conditions per place. [2021-11-23 14:17:33,563 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 235 selfloop transitions, 169 changer transitions 26/475 dead transitions. [2021-11-23 14:17:33,564 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 475 transitions, 9585 flow [2021-11-23 14:17:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 14:17:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-23 14:17:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2021-11-23 14:17:33,577 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2021-11-23 14:17:33,578 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2021-11-23 14:17:33,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2021-11-23 14:17:33,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:33,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2021-11-23 14:17:33,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:33,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:33,600 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:33,601 INFO L186 Difference]: Start difference. First operand has 285 places, 331 transitions, 4313 flow. Second operand 45 states and 2593 transitions. [2021-11-23 14:17:33,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 475 transitions, 9585 flow [2021-11-23 14:17:33,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 475 transitions, 8826 flow, removed 354 selfloop flow, removed 23 redundant places. [2021-11-23 14:17:34,000 INFO L242 Difference]: Finished difference. Result has 318 places, 388 transitions, 5550 flow [2021-11-23 14:17:34,001 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5550, PETRI_PLACES=318, PETRI_TRANSITIONS=388} [2021-11-23 14:17:34,001 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 248 predicate places. [2021-11-23 14:17:34,002 INFO L470 AbstractCegarLoop]: Abstraction has has 318 places, 388 transitions, 5550 flow [2021-11-23 14:17:34,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.38709677419355) internal successors, (1748), 31 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:34,003 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:34,003 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:34,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:34,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 14:17:34,216 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1437552218, now seen corresponding path program 7 times [2021-11-23 14:17:34,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:34,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367639983] [2021-11-23 14:17:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:34,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:34,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:34,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367639983] [2021-11-23 14:17:34,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367639983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:34,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930533608] [2021-11-23 14:17:34,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:17:34,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:34,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:34,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:34,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 14:17:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 14:17:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:35,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930533608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:35,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:35,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2021-11-23 14:17:35,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374732703] [2021-11-23 14:17:35,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:35,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 14:17:35,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:35,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 14:17:35,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 14:17:35,756 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:35,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 388 transitions, 5550 flow. Second operand has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:35,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:35,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:35,759 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:37,619 INFO L129 PetriNetUnfolder]: 406/2791 cut-off events. [2021-11-23 14:17:37,622 INFO L130 PetriNetUnfolder]: For 182921/183384 co-relation queries the response was YES. [2021-11-23 14:17:37,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15161 conditions, 2791 events. 406/2791 cut-off events. For 182921/183384 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 22182 event pairs, 0 based on Foata normal form. 61/2559 useless extension candidates. Maximal degree in co-relation 15015. Up to 414 conditions per place. [2021-11-23 14:17:37,835 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 126 selfloop transitions, 360 changer transitions 26/557 dead transitions. [2021-11-23 14:17:37,835 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 557 transitions, 12545 flow [2021-11-23 14:17:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 14:17:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-11-23 14:17:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3000 transitions. [2021-11-23 14:17:37,841 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8241758241758241 [2021-11-23 14:17:37,842 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3000 transitions. [2021-11-23 14:17:37,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3000 transitions. [2021-11-23 14:17:37,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:37,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3000 transitions. [2021-11-23 14:17:37,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 57.69230769230769) internal successors, (3000), 52 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:37,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:37,858 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 70.0) internal successors, (3710), 53 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:37,858 INFO L186 Difference]: Start difference. First operand has 318 places, 388 transitions, 5550 flow. Second operand 52 states and 3000 transitions. [2021-11-23 14:17:37,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 557 transitions, 12545 flow [2021-11-23 14:17:38,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 557 transitions, 11209 flow, removed 581 selfloop flow, removed 31 redundant places. [2021-11-23 14:17:38,275 INFO L242 Difference]: Finished difference. Result has 353 places, 470 transitions, 7581 flow [2021-11-23 14:17:38,276 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=4894, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=7581, PETRI_PLACES=353, PETRI_TRANSITIONS=470} [2021-11-23 14:17:38,276 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 283 predicate places. [2021-11-23 14:17:38,277 INFO L470 AbstractCegarLoop]: Abstraction has has 353 places, 470 transitions, 7581 flow [2021-11-23 14:17:38,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.38235294117647) internal successors, (1917), 34 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:38,278 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:38,278 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:38,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:38,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 14:17:38,490 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:38,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:38,491 INFO L85 PathProgramCache]: Analyzing trace with hash 854107110, now seen corresponding path program 8 times [2021-11-23 14:17:38,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:38,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330967756] [2021-11-23 14:17:38,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:38,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:38,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330967756] [2021-11-23 14:17:38,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330967756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:38,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818293408] [2021-11-23 14:17:38,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:17:38,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:38,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:38,787 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:38,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 14:17:38,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:17:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:38,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 14:17:38,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:39,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:17:39,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818293408] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:39,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:39,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2021-11-23 14:17:39,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634245529] [2021-11-23 14:17:39,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:39,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 14:17:39,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:39,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 14:17:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 14:17:39,769 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:39,771 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 470 transitions, 7581 flow. Second operand has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:39,771 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:39,771 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:39,771 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:42,158 INFO L129 PetriNetUnfolder]: 474/3209 cut-off events. [2021-11-23 14:17:42,158 INFO L130 PetriNetUnfolder]: For 285095/285642 co-relation queries the response was YES. [2021-11-23 14:17:42,213 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19564 conditions, 3209 events. 474/3209 cut-off events. For 285095/285642 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 26575 event pairs, 0 based on Foata normal form. 70/2944 useless extension candidates. Maximal degree in co-relation 19402. Up to 484 conditions per place. [2021-11-23 14:17:42,252 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 118 selfloop transitions, 444 changer transitions 29/636 dead transitions. [2021-11-23 14:17:42,253 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 636 transitions, 15920 flow [2021-11-23 14:17:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 14:17:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-11-23 14:17:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3465 transitions. [2021-11-23 14:17:42,260 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.825 [2021-11-23 14:17:42,260 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3465 transitions. [2021-11-23 14:17:42,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3465 transitions. [2021-11-23 14:17:42,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:42,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3465 transitions. [2021-11-23 14:17:42,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.75) internal successors, (3465), 60 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:42,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:42,281 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:42,281 INFO L186 Difference]: Start difference. First operand has 353 places, 470 transitions, 7581 flow. Second operand 60 states and 3465 transitions. [2021-11-23 14:17:42,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 636 transitions, 15920 flow [2021-11-23 14:17:42,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 636 transitions, 13750 flow, removed 1036 selfloop flow, removed 22 redundant places. [2021-11-23 14:17:43,011 INFO L242 Difference]: Finished difference. Result has 406 places, 539 transitions, 9284 flow [2021-11-23 14:17:43,011 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6589, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=9284, PETRI_PLACES=406, PETRI_TRANSITIONS=539} [2021-11-23 14:17:43,012 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 336 predicate places. [2021-11-23 14:17:43,012 INFO L470 AbstractCegarLoop]: Abstraction has has 406 places, 539 transitions, 9284 flow [2021-11-23 14:17:43,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.371428571428574) internal successors, (1973), 35 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:43,013 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:43,013 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:43,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:43,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 14:17:43,228 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -67451684, now seen corresponding path program 9 times [2021-11-23 14:17:43,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:43,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451350177] [2021-11-23 14:17:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:43,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:43,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:17:43,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:43,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451350177] [2021-11-23 14:17:43,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451350177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:43,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265320172] [2021-11-23 14:17:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:17:43,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:43,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:43,571 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:43,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 14:17:43,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 14:17:43,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:43,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 14:17:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:17:43,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:17:44,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265320172] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:44,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:44,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 27 [2021-11-23 14:17:44,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072270511] [2021-11-23 14:17:44,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:44,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-23 14:17:44,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-23 14:17:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-23 14:17:44,288 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2021-11-23 14:17:44,290 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 539 transitions, 9284 flow. Second operand has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:44,290 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:44,290 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2021-11-23 14:17:44,290 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:46,394 INFO L129 PetriNetUnfolder]: 483/3312 cut-off events. [2021-11-23 14:17:46,394 INFO L130 PetriNetUnfolder]: For 333788/334123 co-relation queries the response was YES. [2021-11-23 14:17:46,433 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21079 conditions, 3312 events. 483/3312 cut-off events. For 333788/334123 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 27395 event pairs, 0 based on Foata normal form. 73/3039 useless extension candidates. Maximal degree in co-relation 20900. Up to 504 conditions per place. [2021-11-23 14:17:46,478 INFO L132 encePairwiseOnDemand]: 63/70 looper letters, 105 selfloop transitions, 448 changer transitions 14/612 dead transitions. [2021-11-23 14:17:46,478 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 612 transitions, 15553 flow [2021-11-23 14:17:46,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-23 14:17:46,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-11-23 14:17:46,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2942 transitions. [2021-11-23 14:17:46,484 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8240896358543417 [2021-11-23 14:17:46,484 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2942 transitions. [2021-11-23 14:17:46,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2942 transitions. [2021-11-23 14:17:46,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:46,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2942 transitions. [2021-11-23 14:17:46,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 57.68627450980392) internal successors, (2942), 51 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:46,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:46,500 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 70.0) internal successors, (3640), 52 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:46,500 INFO L186 Difference]: Start difference. First operand has 406 places, 539 transitions, 9284 flow. Second operand 51 states and 2942 transitions. [2021-11-23 14:17:46,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 612 transitions, 15553 flow [2021-11-23 14:17:47,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 612 transitions, 13489 flow, removed 788 selfloop flow, removed 38 redundant places. [2021-11-23 14:17:47,420 INFO L242 Difference]: Finished difference. Result has 420 places, 558 transitions, 9737 flow [2021-11-23 14:17:47,421 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=7880, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9737, PETRI_PLACES=420, PETRI_TRANSITIONS=558} [2021-11-23 14:17:47,421 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 350 predicate places. [2021-11-23 14:17:47,421 INFO L470 AbstractCegarLoop]: Abstraction has has 420 places, 558 transitions, 9737 flow [2021-11-23 14:17:47,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 56.407407407407405) internal successors, (1523), 27 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:47,422 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:47,422 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:47,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-23 14:17:47,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 14:17:47,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:47,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:47,651 INFO L85 PathProgramCache]: Analyzing trace with hash 622164624, now seen corresponding path program 10 times [2021-11-23 14:17:47,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:47,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776711519] [2021-11-23 14:17:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:47,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 386 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 14:17:48,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776711519] [2021-11-23 14:17:48,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776711519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:48,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473129236] [2021-11-23 14:17:48,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:17:48,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:48,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:48,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:48,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 14:17:48,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:17:48,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 14:17:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 423 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 14:17:48,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:48,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473129236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:48,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:48,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-11-23 14:17:48,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586362183] [2021-11-23 14:17:48,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:48,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 14:17:48,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 14:17:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:17:48,402 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2021-11-23 14:17:48,403 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 558 transitions, 9737 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:48,403 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:48,403 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2021-11-23 14:17:48,404 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:17:54,990 INFO L129 PetriNetUnfolder]: 2744/14546 cut-off events. [2021-11-23 14:17:54,990 INFO L130 PetriNetUnfolder]: For 1106529/1106825 co-relation queries the response was YES. [2021-11-23 14:17:55,366 INFO L84 FinitePrefix]: Finished finitePrefix Result has 79887 conditions, 14546 events. 2744/14546 cut-off events. For 1106529/1106825 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 173699 event pairs, 650 based on Foata normal form. 95/13025 useless extension candidates. Maximal degree in co-relation 79739. Up to 1992 conditions per place. [2021-11-23 14:17:55,410 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 14 selfloop transitions, 41 changer transitions 369/611 dead transitions. [2021-11-23 14:17:55,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 611 transitions, 9456 flow [2021-11-23 14:17:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 14:17:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 14:17:55,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2000 transitions. [2021-11-23 14:17:55,414 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8658008658008658 [2021-11-23 14:17:55,414 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2000 transitions. [2021-11-23 14:17:55,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2000 transitions. [2021-11-23 14:17:55,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:17:55,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2000 transitions. [2021-11-23 14:17:55,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.60606060606061) internal successors, (2000), 33 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:55,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:55,424 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:55,424 INFO L186 Difference]: Start difference. First operand has 420 places, 558 transitions, 9737 flow. Second operand 33 states and 2000 transitions. [2021-11-23 14:17:55,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 611 transitions, 9456 flow [2021-11-23 14:17:56,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 611 transitions, 8624 flow, removed 240 selfloop flow, removed 34 redundant places. [2021-11-23 14:17:56,963 INFO L242 Difference]: Finished difference. Result has 409 places, 232 transitions, 2415 flow [2021-11-23 14:17:56,964 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8238, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2415, PETRI_PLACES=409, PETRI_TRANSITIONS=232} [2021-11-23 14:17:56,964 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 339 predicate places. [2021-11-23 14:17:56,965 INFO L470 AbstractCegarLoop]: Abstraction has has 409 places, 232 transitions, 2415 flow [2021-11-23 14:17:56,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:56,965 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-23 14:17:56,966 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:57,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:57,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-23 14:17:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2053829367, now seen corresponding path program 11 times [2021-11-23 14:17:57,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:57,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482359062] [2021-11-23 14:17:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:57,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 370 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 14:17:57,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482359062] [2021-11-23 14:17:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482359062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818032227] [2021-11-23 14:17:57,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:17:57,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:57,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:57,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 14:17:57,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 14:17:57,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 14:17:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 14:17:57,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 14:17:57,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818032227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:17:57,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 14:17:57,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-11-23 14:17:57,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325911543] [2021-11-23 14:17:57,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:17:57,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 14:17:57,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:57,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 14:17:57,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:17:57,823 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 70 [2021-11-23 14:17:57,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 232 transitions, 2415 flow. Second operand has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:57,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-23 14:17:57,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 70 [2021-11-23 14:17:57,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-23 14:18:04,457 INFO L129 PetriNetUnfolder]: 4789/18664 cut-off events. [2021-11-23 14:18:04,457 INFO L130 PetriNetUnfolder]: For 1435873/1436525 co-relation queries the response was YES. [2021-11-23 14:18:04,981 INFO L84 FinitePrefix]: Finished finitePrefix Result has 117546 conditions, 18664 events. 4789/18664 cut-off events. For 1435873/1436525 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 225635 event pairs, 1183 based on Foata normal form. 120/17300 useless extension candidates. Maximal degree in co-relation 117408. Up to 3115 conditions per place. [2021-11-23 14:18:05,000 INFO L132 encePairwiseOnDemand]: 64/70 looper letters, 0 selfloop transitions, 0 changer transitions 270/270 dead transitions. [2021-11-23 14:18:05,000 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 270 transitions, 2409 flow [2021-11-23 14:18:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 14:18:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-23 14:18:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1969 transitions. [2021-11-23 14:18:05,003 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8523809523809524 [2021-11-23 14:18:05,004 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1969 transitions. [2021-11-23 14:18:05,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1969 transitions. [2021-11-23 14:18:05,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-23 14:18:05,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1969 transitions. [2021-11-23 14:18:05,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.666666666666664) internal successors, (1969), 33 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,012 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,013 INFO L186 Difference]: Start difference. First operand has 409 places, 232 transitions, 2415 flow. Second operand 33 states and 1969 transitions. [2021-11-23 14:18:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 270 transitions, 2409 flow [2021-11-23 14:18:06,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 270 transitions, 1905 flow, removed 56 selfloop flow, removed 84 redundant places. [2021-11-23 14:18:06,151 INFO L242 Difference]: Finished difference. Result has 296 places, 0 transitions, 0 flow [2021-11-23 14:18:06,152 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=0, PETRI_PLACES=296, PETRI_TRANSITIONS=0} [2021-11-23 14:18:06,152 INFO L334 CegarLoopForPetriNet]: 70 programPoint places, 226 predicate places. [2021-11-23 14:18:06,152 INFO L470 AbstractCegarLoop]: Abstraction has has 296 places, 0 transitions, 0 flow [2021-11-23 14:18:06,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 59.91304347826087) internal successors, (1378), 23 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:06,155 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-11-23 14:18:06,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2021-11-23 14:18:06,156 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2021-11-23 14:18:06,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 14:18:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 14:18:06,374 INFO L732 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1] [2021-11-23 14:18:06,377 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-11-23 14:18:06,377 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 14:18:06,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:18:06 BasicIcfg [2021-11-23 14:18:06,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 14:18:06,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 14:18:06,382 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 14:18:06,382 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 14:18:06,383 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:17:14" (3/4) ... [2021-11-23 14:18:06,386 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 14:18:06,393 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-11-23 14:18:06,393 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-11-23 14:18:06,401 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-11-23 14:18:06,401 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 14:18:06,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 14:18:06,402 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 14:18:06,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 14:18:06,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 14:18:06,428 INFO L158 Benchmark]: Toolchain (without parser) took 53011.17ms. Allocated memory was 117.4MB in the beginning and 9.2GB in the end (delta: 9.1GB). Free memory was 79.5MB in the beginning and 7.6GB in the end (delta: -7.5GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2021-11-23 14:18:06,428 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 14:18:06,429 INFO L158 Benchmark]: CACSL2BoogieTranslator took 516.51ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 82.9MB in the end (delta: -3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 14:18:06,429 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.09ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 81.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 14:18:06,429 INFO L158 Benchmark]: Boogie Preprocessor took 28.14ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 14:18:06,430 INFO L158 Benchmark]: RCFGBuilder took 364.49ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 68.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 14:18:06,430 INFO L158 Benchmark]: TraceAbstraction took 51986.42ms. Allocated memory was 117.4MB in the beginning and 9.2GB in the end (delta: 9.1GB). Free memory was 67.6MB in the beginning and 7.6GB in the end (delta: -7.5GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. [2021-11-23 14:18:06,431 INFO L158 Benchmark]: Witness Printer took 45.45ms. Allocated memory is still 9.2GB. Free memory was 7.6GB in the beginning and 7.6GB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 14:18:06,432 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 516.51ms. Allocated memory is still 117.4MB. Free memory was 79.4MB in the beginning and 82.9MB in the end (delta: -3.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.09ms. Allocated memory is still 117.4MB. Free memory was 82.9MB in the beginning and 81.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.14ms. Allocated memory is still 117.4MB. Free memory was 81.2MB in the beginning and 79.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.49ms. Allocated memory is still 117.4MB. Free memory was 79.7MB in the beginning and 68.1MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 51986.42ms. Allocated memory was 117.4MB in the beginning and 9.2GB in the end (delta: 9.1GB). Free memory was 67.6MB in the beginning and 7.6GB in the end (delta: -7.5GB). Peak memory consumption was 1.6GB. Max. memory is 16.1GB. * Witness Printer took 45.45ms. Allocated memory is still 9.2GB. Free memory was 7.6GB in the beginning and 7.6GB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 51.9s, OverallIterations: 18, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 35.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 905 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 905 mSDsluCounter, 320 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 472 mSDsCounter, 1525 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2808 IncrementalHoareTripleChecker+Invalid, 4333 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1525 mSolverCounterUnsat, 95 mSDtfsCounter, 2808 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2788 GetRequests, 2068 SyntacticMatches, 6 SemanticMatches, 714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10670 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9737occurred in iteration=16, InterpolantAutomatonStates: 536, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 2660 NumberOfCodeBlocks, 2651 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 3555 ConstructedInterpolants, 0 QuantifiedInterpolants, 13805 SizeOfPredicates, 163 NumberOfNonLiveVariables, 2462 ConjunctsInSsa, 217 ConjunctsInUnsatCore, 40 InterpolantComputations, 8 PerfectInterpolantSequences, 1788/7028 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! [2021-11-23 14:18:06,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87160b9c-0541-4d41-9f66-b48b6e257e45/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE