./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-nondet/nondet-array-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-nondet/nondet-array-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF --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 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:12:30,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:12:30,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:12:31,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:12:31,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:12:31,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:12:31,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:12:31,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:12:31,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:12:31,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:12:31,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:12:31,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:12:31,092 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:12:31,093 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:12:31,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:12:31,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:12:31,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:12:31,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:12:31,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:12:31,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:12:31,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:12:31,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:12:31,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:12:31,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:12:31,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:12:31,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:12:31,133 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:12:31,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:12:31,136 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:12:31,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:12:31,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:12:31,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:12:31,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:12:31,144 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:12:31,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:12:31,146 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:12:31,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:12:31,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:12:31,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:12:31,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:12:31,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:12:31,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:12:31,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:12:31,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:12:31,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:12:31,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:12:31,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:12:31,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:12:31,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:12:31,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:12:31,208 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:12:31,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:12:31,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:12:31,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:12:31,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:12:31,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:12:31,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:12:31,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:12:31,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:12:31,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:12:31,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:12:31,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:12:31,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:12:31,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:12:31,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:12:31,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:12:31,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:12:31,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:12:31,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:12:31,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:12:31,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:12:31,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:12:31,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:12:31,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:12:31,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:12:31,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:12:31,217 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_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2796c466e7d8363340777400f1e90c0fc7eb53096f49ded0fb8aa6814bf1ef21 [2021-11-20 06:12:31,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:12:31,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:12:31,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:12:31,609 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:12:31,610 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:12:31,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2021-11-20 06:12:31,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/data/291b53258/54b6f662e9754d90862c135b84cb8fab/FLAGf014f4b9f [2021-11-20 06:12:32,371 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:12:32,376 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/sv-benchmarks/c/pthread-nondet/nondet-array-2.i [2021-11-20 06:12:32,399 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/data/291b53258/54b6f662e9754d90862c135b84cb8fab/FLAGf014f4b9f [2021-11-20 06:12:32,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/data/291b53258/54b6f662e9754d90862c135b84cb8fab [2021-11-20 06:12:32,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:12:32,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:12:32,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:12:32,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:12:32,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:12:32,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:12:32" (1/1) ... [2021-11-20 06:12:32,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234c43f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:32, skipping insertion in model container [2021-11-20 06:12:32,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:12:32" (1/1) ... [2021-11-20 06:12:32,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:12:32,674 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:12:33,084 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_d75f299c-4b49-4570-9573-5288b8be286f/sv-benchmarks/c/pthread-nondet/nondet-array-2.i[30035,30048] [2021-11-20 06:12:33,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:12:33,118 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:12:33,159 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_d75f299c-4b49-4570-9573-5288b8be286f/sv-benchmarks/c/pthread-nondet/nondet-array-2.i[30035,30048] [2021-11-20 06:12:33,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:12:33,209 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:12:33,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33 WrapperNode [2021-11-20 06:12:33,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:12:33,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:12:33,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:12:33,211 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:12:33,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,266 INFO L137 Inliner]: procedures = 170, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2021-11-20 06:12:33,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:12:33,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:12:33,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:12:33,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:12:33,276 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,295 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:12:33,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:12:33,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:12:33,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:12:33,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (1/1) ... [2021-11-20 06:12:33,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:12:33,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:33,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:12:33,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:12:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 06:12:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:12:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:12:33,392 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2021-11-20 06:12:33,393 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2021-11-20 06:12:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:12:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:12:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:12:33,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:12:33,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:12:33,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:12:33,395 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-20 06:12:33,525 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:12:33,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:12:33,825 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:12:33,833 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:12:33,833 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:12:33,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:12:33 BoogieIcfgContainer [2021-11-20 06:12:33,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:12:33,837 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:12:33,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:12:33,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:12:33,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:12:32" (1/3) ... [2021-11-20 06:12:33,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c053208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:12:33, skipping insertion in model container [2021-11-20 06:12:33,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:33" (2/3) ... [2021-11-20 06:12:33,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c053208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:12:33, skipping insertion in model container [2021-11-20 06:12:33,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:12:33" (3/3) ... [2021-11-20 06:12:33,844 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2021-11-20 06:12:33,850 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-20 06:12:33,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:12:33,850 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:12:33,851 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-20 06:12:33,876 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,877 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,877 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,877 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,877 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,878 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,878 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,878 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,878 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,879 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,879 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,879 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,879 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,880 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,883 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,883 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,883 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,884 WARN L322 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,884 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:33,887 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2021-11-20 06:12:33,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:33,948 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 [2021-11-20 06:12:33,949 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:12:33,962 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 88 transitions, 184 flow [2021-11-20 06:12:34,014 INFO L129 PetriNetUnfolder]: 12/126 cut-off events. [2021-11-20 06:12:34,014 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-11-20 06:12:34,017 INFO L84 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 126 events. 12/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 225 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 71. Up to 4 conditions per place. [2021-11-20 06:12:34,017 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 88 transitions, 184 flow [2021-11-20 06:12:34,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 78 transitions, 164 flow [2021-11-20 06:12:34,041 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-11-20 06:12:34,041 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:12:34,042 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:34,043 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] [2021-11-20 06:12:34,043 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -744396743, now seen corresponding path program 1 times [2021-11-20 06:12:34,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:34,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452035994] [2021-11-20 06:12:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:34,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452035994] [2021-11-20 06:12:34,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452035994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:34,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:34,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:34,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774284675] [2021-11-20 06:12:34,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:34,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:34,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:34,356 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 88 [2021-11-20 06:12:34,361 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,362 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:34,362 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 88 [2021-11-20 06:12:34,363 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:34,433 INFO L129 PetriNetUnfolder]: 3/99 cut-off events. [2021-11-20 06:12:34,433 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-20 06:12:34,434 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 99 events. 3/99 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 145 event pairs, 0 based on Foata normal form. 7/99 useless extension candidates. Maximal degree in co-relation 57. Up to 4 conditions per place. [2021-11-20 06:12:34,435 INFO L132 encePairwiseOnDemand]: 84/88 looper letters, 2 selfloop transitions, 0 changer transitions 1/74 dead transitions. [2021-11-20 06:12:34,436 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 74 transitions, 160 flow [2021-11-20 06:12:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:12:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 166 transitions. [2021-11-20 06:12:34,452 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9431818181818182 [2021-11-20 06:12:34,452 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 166 transitions. [2021-11-20 06:12:34,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 166 transitions. [2021-11-20 06:12:34,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:34,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 166 transitions. [2021-11-20 06:12:34,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,480 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,482 INFO L186 Difference]: Start difference. First operand has 75 places, 78 transitions, 164 flow. Second operand 2 states and 166 transitions. [2021-11-20 06:12:34,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 74 transitions, 160 flow [2021-11-20 06:12:34,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:34,491 INFO L242 Difference]: Finished difference. Result has 76 places, 73 transitions, 154 flow [2021-11-20 06:12:34,493 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=154, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2021-11-20 06:12:34,497 INFO L334 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2021-11-20 06:12:34,498 INFO L470 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 154 flow [2021-11-20 06:12:34,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,498 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:34,498 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] [2021-11-20 06:12:34,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:12:34,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash -53406567, now seen corresponding path program 1 times [2021-11-20 06:12:34,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:34,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522584098] [2021-11-20 06:12:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:34,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:34,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522584098] [2021-11-20 06:12:34,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522584098] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:34,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:34,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:34,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847478960] [2021-11-20 06:12:34,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:34,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:34,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:34,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:34,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:34,688 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 88 [2021-11-20 06:12:34,689 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,689 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:34,689 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 88 [2021-11-20 06:12:34,689 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:34,790 INFO L129 PetriNetUnfolder]: 3/114 cut-off events. [2021-11-20 06:12:34,790 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-20 06:12:34,791 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 114 events. 3/114 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 190 event pairs, 0 based on Foata normal form. 2/108 useless extension candidates. Maximal degree in co-relation 141. Up to 16 conditions per place. [2021-11-20 06:12:34,792 INFO L132 encePairwiseOnDemand]: 83/88 looper letters, 8 selfloop transitions, 2 changer transitions 3/77 dead transitions. [2021-11-20 06:12:34,792 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 77 transitions, 188 flow [2021-11-20 06:12:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:12:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 374 transitions. [2021-11-20 06:12:34,803 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.85 [2021-11-20 06:12:34,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 374 transitions. [2021-11-20 06:12:34,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 374 transitions. [2021-11-20 06:12:34,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:34,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 374 transitions. [2021-11-20 06:12:34,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.8) internal successors, (374), 5 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,815 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 88.0) internal successors, (528), 6 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,815 INFO L186 Difference]: Start difference. First operand has 76 places, 73 transitions, 154 flow. Second operand 5 states and 374 transitions. [2021-11-20 06:12:34,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 77 transitions, 188 flow [2021-11-20 06:12:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 77 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:34,820 INFO L242 Difference]: Finished difference. Result has 82 places, 74 transitions, 170 flow [2021-11-20 06:12:34,821 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=82, PETRI_TRANSITIONS=74} [2021-11-20 06:12:34,821 INFO L334 CegarLoopForPetriNet]: 75 programPoint places, 7 predicate places. [2021-11-20 06:12:34,822 INFO L470 AbstractCegarLoop]: Abstraction has has 82 places, 74 transitions, 170 flow [2021-11-20 06:12:34,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:34,822 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:34,823 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:34,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:12:34,824 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash -658806082, now seen corresponding path program 1 times [2021-11-20 06:12:34,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:34,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053330614] [2021-11-20 06:12:34,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:34,905 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:12:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:34,973 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:12:34,973 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:12:34,974 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-11-20 06:12:34,976 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-20 06:12:34,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:12:34,981 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-20 06:12:34,983 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-20 06:12:34,983 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-11-20 06:12:34,992 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,993 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,993 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,993 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,993 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,993 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,994 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,994 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,994 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,994 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,994 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,995 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,995 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,995 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,995 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,996 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,997 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,997 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,997 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,997 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,997 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,998 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,998 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,998 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,999 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,999 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:34,999 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,003 WARN L322 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,005 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,005 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,005 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,005 WARN L322 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,005 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,009 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-11-20 06:12:35,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:35,021 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 [2021-11-20 06:12:35,021 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:12:35,024 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 92 places, 95 transitions, 208 flow [2021-11-20 06:12:35,078 INFO L129 PetriNetUnfolder]: 23/217 cut-off events. [2021-11-20 06:12:35,078 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-11-20 06:12:35,079 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 217 events. 23/217 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 512 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2021-11-20 06:12:35,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 95 transitions, 208 flow [2021-11-20 06:12:35,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 188 flow [2021-11-20 06:12:35,096 INFO L129 PetriNetUnfolder]: 7/76 cut-off events. [2021-11-20 06:12:35,096 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:12:35,096 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:35,097 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] [2021-11-20 06:12:35,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 477382265, now seen corresponding path program 1 times [2021-11-20 06:12:35,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80495960] [2021-11-20 06:12:35,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:35,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:35,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80495960] [2021-11-20 06:12:35,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80495960] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:35,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:35,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:35,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403925625] [2021-11-20 06:12:35,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:35,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:35,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:35,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:35,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:35,181 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 95 [2021-11-20 06:12:35,181 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 188 flow. Second operand has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,181 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:35,181 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 95 [2021-11-20 06:12:35,182 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:35,221 INFO L129 PetriNetUnfolder]: 7/165 cut-off events. [2021-11-20 06:12:35,221 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-11-20 06:12:35,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 165 events. 7/165 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 344 event pairs, 0 based on Foata normal form. 12/165 useless extension candidates. Maximal degree in co-relation 103. Up to 8 conditions per place. [2021-11-20 06:12:35,223 INFO L132 encePairwiseOnDemand]: 91/95 looper letters, 4 selfloop transitions, 0 changer transitions 1/81 dead transitions. [2021-11-20 06:12:35,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 81 transitions, 188 flow [2021-11-20 06:12:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:12:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 178 transitions. [2021-11-20 06:12:35,225 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9368421052631579 [2021-11-20 06:12:35,225 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 178 transitions. [2021-11-20 06:12:35,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 178 transitions. [2021-11-20 06:12:35,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:35,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 178 transitions. [2021-11-20 06:12:35,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 89.0) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,229 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,229 INFO L186 Difference]: Start difference. First operand has 83 places, 85 transitions, 188 flow. Second operand 2 states and 178 transitions. [2021-11-20 06:12:35,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 81 transitions, 188 flow [2021-11-20 06:12:35,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 81 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:35,235 INFO L242 Difference]: Finished difference. Result has 84 places, 80 transitions, 178 flow [2021-11-20 06:12:35,235 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=80} [2021-11-20 06:12:35,238 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2021-11-20 06:12:35,239 INFO L470 AbstractCegarLoop]: Abstraction has has 84 places, 80 transitions, 178 flow [2021-11-20 06:12:35,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 85.5) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,239 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:35,239 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] [2021-11-20 06:12:35,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:12:35,240 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:35,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,240 INFO L85 PathProgramCache]: Analyzing trace with hash 280868760, now seen corresponding path program 1 times [2021-11-20 06:12:35,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601509095] [2021-11-20 06:12:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:35,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601509095] [2021-11-20 06:12:35,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601509095] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:35,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:35,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:35,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410136428] [2021-11-20 06:12:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:35,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:35,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:35,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:35,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 95 [2021-11-20 06:12:35,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:35,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 95 [2021-11-20 06:12:35,387 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:35,470 INFO L129 PetriNetUnfolder]: 7/196 cut-off events. [2021-11-20 06:12:35,470 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2021-11-20 06:12:35,471 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 196 events. 7/196 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 462 event pairs, 0 based on Foata normal form. 4/185 useless extension candidates. Maximal degree in co-relation 254. Up to 32 conditions per place. [2021-11-20 06:12:35,472 INFO L132 encePairwiseOnDemand]: 90/95 looper letters, 10 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2021-11-20 06:12:35,472 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 216 flow [2021-11-20 06:12:35,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:12:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 401 transitions. [2021-11-20 06:12:35,475 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8442105263157895 [2021-11-20 06:12:35,475 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 401 transitions. [2021-11-20 06:12:35,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 401 transitions. [2021-11-20 06:12:35,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:35,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 401 transitions. [2021-11-20 06:12:35,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,479 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 95.0) internal successors, (570), 6 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,480 INFO L186 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 5 states and 401 transitions. [2021-11-20 06:12:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 216 flow [2021-11-20 06:12:35,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 84 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:35,488 INFO L242 Difference]: Finished difference. Result has 90 places, 81 transitions, 194 flow [2021-11-20 06:12:35,488 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=90, PETRI_TRANSITIONS=81} [2021-11-20 06:12:35,490 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2021-11-20 06:12:35,490 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 81 transitions, 194 flow [2021-11-20 06:12:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,491 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:35,491 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:12:35,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -123182927, now seen corresponding path program 1 times [2021-11-20 06:12:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472753] [2021-11-20 06:12:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:35,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:35,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472753] [2021-11-20 06:12:35,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:35,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:35,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:35,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910198285] [2021-11-20 06:12:35,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:35,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:35,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:35,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:35,613 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 95 [2021-11-20 06:12:35,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 81 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:35,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 95 [2021-11-20 06:12:35,615 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:35,760 INFO L129 PetriNetUnfolder]: 7/190 cut-off events. [2021-11-20 06:12:35,760 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2021-11-20 06:12:35,762 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 190 events. 7/190 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 409 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 317. Up to 49 conditions per place. [2021-11-20 06:12:35,766 INFO L132 encePairwiseOnDemand]: 84/95 looper letters, 34 selfloop transitions, 6 changer transitions 7/102 dead transitions. [2021-11-20 06:12:35,766 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 336 flow [2021-11-20 06:12:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:12:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 301 transitions. [2021-11-20 06:12:35,768 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7921052631578948 [2021-11-20 06:12:35,768 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 301 transitions. [2021-11-20 06:12:35,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 301 transitions. [2021-11-20 06:12:35,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:35,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 301 transitions. [2021-11-20 06:12:35,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.25) internal successors, (301), 4 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2021-11-20 06:12:35,774 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 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) [2021-11-20 06:12:35,775 INFO L186 Difference]: Start difference. First operand has 90 places, 81 transitions, 194 flow. Second operand 4 states and 301 transitions. [2021-11-20 06:12:35,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 336 flow [2021-11-20 06:12:35,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 102 transitions, 330 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 06:12:35,783 INFO L242 Difference]: Finished difference. Result has 90 places, 84 transitions, 228 flow [2021-11-20 06:12:35,784 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=95, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2021-11-20 06:12:35,787 INFO L334 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2021-11-20 06:12:35,788 INFO L470 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 228 flow [2021-11-20 06:12:35,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.8) internal successors, (329), 5 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:35,788 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:35,789 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:35,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:12:35,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 618023769, now seen corresponding path program 1 times [2021-11-20 06:12:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789128788] [2021-11-20 06:12:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:35,821 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:12:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:35,876 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:12:35,876 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:12:35,876 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-11-20 06:12:35,876 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-20 06:12:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:12:35,877 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-20 06:12:35,877 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-20 06:12:35,877 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-11-20 06:12:35,888 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,889 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,890 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,890 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,890 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,890 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,890 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,891 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,892 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,892 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,892 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,892 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,892 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,893 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,893 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,893 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,893 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,893 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,894 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,895 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,895 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,895 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,895 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,895 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,896 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,896 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,896 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,897 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,897 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,897 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,897 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,898 WARN L322 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,900 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,900 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,900 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,900 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,901 WARN L322 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,902 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,902 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,902 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,902 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,902 WARN L322 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:35,909 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-11-20 06:12:35,911 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:35,912 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 [2021-11-20 06:12:35,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:12:35,918 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 234 flow [2021-11-20 06:12:35,984 INFO L129 PetriNetUnfolder]: 45/383 cut-off events. [2021-11-20 06:12:35,985 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2021-11-20 06:12:35,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 45/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1193 event pairs, 1 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 225. Up to 16 conditions per place. [2021-11-20 06:12:35,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 102 transitions, 234 flow [2021-11-20 06:12:35,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 92 transitions, 214 flow [2021-11-20 06:12:36,008 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-11-20 06:12:36,009 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:12:36,009 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:36,009 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] [2021-11-20 06:12:36,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:36,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -783703138, now seen corresponding path program 1 times [2021-11-20 06:12:36,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142239508] [2021-11-20 06:12:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:36,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142239508] [2021-11-20 06:12:36,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142239508] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:36,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:36,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:36,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123260012] [2021-11-20 06:12:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:36,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:36,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:36,071 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 102 [2021-11-20 06:12:36,072 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 214 flow. Second operand has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,072 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:36,072 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 102 [2021-11-20 06:12:36,073 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:36,131 INFO L129 PetriNetUnfolder]: 16/282 cut-off events. [2021-11-20 06:12:36,131 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-11-20 06:12:36,132 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 282 events. 16/282 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 769 event pairs, 1 based on Foata normal form. 21/282 useless extension candidates. Maximal degree in co-relation 179. Up to 16 conditions per place. [2021-11-20 06:12:36,133 INFO L132 encePairwiseOnDemand]: 98/102 looper letters, 6 selfloop transitions, 0 changer transitions 1/88 dead transitions. [2021-11-20 06:12:36,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 218 flow [2021-11-20 06:12:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:12:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 190 transitions. [2021-11-20 06:12:36,135 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9313725490196079 [2021-11-20 06:12:36,136 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 190 transitions. [2021-11-20 06:12:36,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 190 transitions. [2021-11-20 06:12:36,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:36,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 190 transitions. [2021-11-20 06:12:36,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 95.0) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,139 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,140 INFO L186 Difference]: Start difference. First operand has 91 places, 92 transitions, 214 flow. Second operand 2 states and 190 transitions. [2021-11-20 06:12:36,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 218 flow [2021-11-20 06:12:36,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:36,144 INFO L242 Difference]: Finished difference. Result has 92 places, 87 transitions, 204 flow [2021-11-20 06:12:36,144 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=204, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2021-11-20 06:12:36,146 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2021-11-20 06:12:36,146 INFO L470 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 204 flow [2021-11-20 06:12:36,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.0) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,146 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:36,147 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] [2021-11-20 06:12:36,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:12:36,147 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,148 INFO L85 PathProgramCache]: Analyzing trace with hash 232883262, now seen corresponding path program 1 times [2021-11-20 06:12:36,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021885916] [2021-11-20 06:12:36,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:36,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:36,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021885916] [2021-11-20 06:12:36,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021885916] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:36,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:36,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:36,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702161145] [2021-11-20 06:12:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:36,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:36,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:36,216 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 102 [2021-11-20 06:12:36,216 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,216 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:36,216 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 102 [2021-11-20 06:12:36,217 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:36,320 INFO L129 PetriNetUnfolder]: 16/345 cut-off events. [2021-11-20 06:12:36,320 INFO L130 PetriNetUnfolder]: For 49/49 co-relation queries the response was YES. [2021-11-20 06:12:36,321 INFO L84 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 345 events. 16/345 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1116 event pairs, 1 based on Foata normal form. 8/325 useless extension candidates. Maximal degree in co-relation 465. Up to 65 conditions per place. [2021-11-20 06:12:36,322 INFO L132 encePairwiseOnDemand]: 97/102 looper letters, 12 selfloop transitions, 2 changer transitions 3/91 dead transitions. [2021-11-20 06:12:36,323 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 246 flow [2021-11-20 06:12:36,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:12:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 428 transitions. [2021-11-20 06:12:36,325 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8392156862745098 [2021-11-20 06:12:36,325 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 428 transitions. [2021-11-20 06:12:36,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 428 transitions. [2021-11-20 06:12:36,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:36,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 428 transitions. [2021-11-20 06:12:36,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 85.6) internal successors, (428), 5 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 102.0) internal successors, (612), 6 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,329 INFO L186 Difference]: Start difference. First operand has 92 places, 87 transitions, 204 flow. Second operand 5 states and 428 transitions. [2021-11-20 06:12:36,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 246 flow [2021-11-20 06:12:36,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 91 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:36,333 INFO L242 Difference]: Finished difference. Result has 98 places, 88 transitions, 220 flow [2021-11-20 06:12:36,333 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=88} [2021-11-20 06:12:36,335 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2021-11-20 06:12:36,335 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 88 transitions, 220 flow [2021-11-20 06:12:36,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,336 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:36,336 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 06:12:36,336 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash 293691249, now seen corresponding path program 1 times [2021-11-20 06:12:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64319081] [2021-11-20 06:12:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:36,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64319081] [2021-11-20 06:12:36,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64319081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:36,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:36,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023923629] [2021-11-20 06:12:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:36,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:36,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:36,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:36,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:36,422 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 102 [2021-11-20 06:12:36,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 88 transitions, 220 flow. Second operand has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:36,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 102 [2021-11-20 06:12:36,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:36,567 INFO L129 PetriNetUnfolder]: 18/353 cut-off events. [2021-11-20 06:12:36,567 INFO L130 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2021-11-20 06:12:36,570 INFO L84 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 353 events. 18/353 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1275 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 614. Up to 107 conditions per place. [2021-11-20 06:12:36,573 INFO L132 encePairwiseOnDemand]: 91/102 looper letters, 37 selfloop transitions, 6 changer transitions 7/110 dead transitions. [2021-11-20 06:12:36,573 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 110 transitions, 373 flow [2021-11-20 06:12:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:12:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 324 transitions. [2021-11-20 06:12:36,575 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7941176470588235 [2021-11-20 06:12:36,576 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 324 transitions. [2021-11-20 06:12:36,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 324 transitions. [2021-11-20 06:12:36,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:36,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 324 transitions. [2021-11-20 06:12:36,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,581 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,581 INFO L186 Difference]: Start difference. First operand has 98 places, 88 transitions, 220 flow. Second operand 4 states and 324 transitions. [2021-11-20 06:12:36,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 110 transitions, 373 flow [2021-11-20 06:12:36,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 110 transitions, 367 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 06:12:36,589 INFO L242 Difference]: Finished difference. Result has 98 places, 91 transitions, 254 flow [2021-11-20 06:12:36,589 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=98, PETRI_TRANSITIONS=91} [2021-11-20 06:12:36,591 INFO L334 CegarLoopForPetriNet]: 91 programPoint places, 7 predicate places. [2021-11-20 06:12:36,591 INFO L470 AbstractCegarLoop]: Abstraction has has 98 places, 91 transitions, 254 flow [2021-11-20 06:12:36,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.8) internal successors, (354), 5 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,592 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:36,592 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2021-11-20 06:12:36,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:12:36,592 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1470109151, now seen corresponding path program 1 times [2021-11-20 06:12:36,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737067275] [2021-11-20 06:12:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:36,632 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:12:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:36,694 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:12:36,694 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:12:36,695 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-11-20 06:12:36,695 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-20 06:12:36,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:12:36,697 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-20 06:12:36,697 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-20 06:12:36,697 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-11-20 06:12:36,715 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,716 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,717 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,717 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,717 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,718 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,718 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,718 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,718 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,719 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,720 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,721 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,722 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,722 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,722 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,723 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,723 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,723 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,723 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,725 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,726 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,726 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,726 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,726 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,726 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,727 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,727 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,727 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,727 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,728 WARN L322 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,728 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,731 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,732 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,732 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,732 WARN L322 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,732 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,735 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,735 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,736 WARN L322 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,736 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,737 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,737 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,738 WARN L322 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,738 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:36,740 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-20 06:12:36,741 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:36,742 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 [2021-11-20 06:12:36,742 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:12:36,744 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 108 places, 109 transitions, 262 flow [2021-11-20 06:12:36,834 INFO L129 PetriNetUnfolder]: 91/701 cut-off events. [2021-11-20 06:12:36,835 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2021-11-20 06:12:36,836 INFO L84 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 701 events. 91/701 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3012 event pairs, 6 based on Foata normal form. 0/594 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2021-11-20 06:12:36,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 109 transitions, 262 flow [2021-11-20 06:12:36,841 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 99 transitions, 242 flow [2021-11-20 06:12:36,848 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-11-20 06:12:36,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:12:36,849 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:36,849 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] [2021-11-20 06:12:36,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:36,849 INFO L85 PathProgramCache]: Analyzing trace with hash -888353237, now seen corresponding path program 1 times [2021-11-20 06:12:36,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:36,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083645979] [2021-11-20 06:12:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:36,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:36,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:36,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083645979] [2021-11-20 06:12:36,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083645979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:36,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:36,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:36,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395491627] [2021-11-20 06:12:36,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:36,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:36,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:36,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:36,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:36,886 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 109 [2021-11-20 06:12:36,886 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 99 transitions, 242 flow. Second operand has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,886 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:36,886 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 109 [2021-11-20 06:12:36,886 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:36,991 INFO L129 PetriNetUnfolder]: 37/503 cut-off events. [2021-11-20 06:12:36,991 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-11-20 06:12:36,992 INFO L84 FinitePrefix]: Finished finitePrefix Result has 595 conditions, 503 events. 37/503 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2010 event pairs, 6 based on Foata normal form. 38/503 useless extension candidates. Maximal degree in co-relation 317. Up to 37 conditions per place. [2021-11-20 06:12:36,994 INFO L132 encePairwiseOnDemand]: 105/109 looper letters, 8 selfloop transitions, 0 changer transitions 1/95 dead transitions. [2021-11-20 06:12:36,995 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 95 transitions, 250 flow [2021-11-20 06:12:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:36,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:12:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 202 transitions. [2021-11-20 06:12:36,996 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.926605504587156 [2021-11-20 06:12:36,996 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 202 transitions. [2021-11-20 06:12:36,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 202 transitions. [2021-11-20 06:12:36,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:36,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 202 transitions. [2021-11-20 06:12:36,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 101.0) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,998 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:36,999 INFO L186 Difference]: Start difference. First operand has 99 places, 99 transitions, 242 flow. Second operand 2 states and 202 transitions. [2021-11-20 06:12:36,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 95 transitions, 250 flow [2021-11-20 06:12:37,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 95 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:37,003 INFO L242 Difference]: Finished difference. Result has 100 places, 94 transitions, 232 flow [2021-11-20 06:12:37,004 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=232, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2021-11-20 06:12:37,005 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 1 predicate places. [2021-11-20 06:12:37,005 INFO L470 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 232 flow [2021-11-20 06:12:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 96.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,005 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:37,006 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] [2021-11-20 06:12:37,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 06:12:37,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:37,006 INFO L85 PathProgramCache]: Analyzing trace with hash -197363061, now seen corresponding path program 1 times [2021-11-20 06:12:37,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:37,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870535350] [2021-11-20 06:12:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:37,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:37,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:37,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870535350] [2021-11-20 06:12:37,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870535350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:37,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:37,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:37,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633755373] [2021-11-20 06:12:37,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:37,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:37,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:37,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:37,078 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 109 [2021-11-20 06:12:37,078 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:37,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 109 [2021-11-20 06:12:37,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:37,218 INFO L129 PetriNetUnfolder]: 37/630 cut-off events. [2021-11-20 06:12:37,218 INFO L130 PetriNetUnfolder]: For 122/122 co-relation queries the response was YES. [2021-11-20 06:12:37,220 INFO L84 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 630 events. 37/630 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2856 event pairs, 6 based on Foata normal form. 16/593 useless extension candidates. Maximal degree in co-relation 877. Up to 134 conditions per place. [2021-11-20 06:12:37,224 INFO L132 encePairwiseOnDemand]: 104/109 looper letters, 14 selfloop transitions, 2 changer transitions 3/98 dead transitions. [2021-11-20 06:12:37,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 278 flow [2021-11-20 06:12:37,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:12:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 455 transitions. [2021-11-20 06:12:37,227 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8348623853211009 [2021-11-20 06:12:37,227 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 455 transitions. [2021-11-20 06:12:37,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 455 transitions. [2021-11-20 06:12:37,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:37,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 455 transitions. [2021-11-20 06:12:37,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.0) internal successors, (455), 5 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,233 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 109.0) internal successors, (654), 6 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,233 INFO L186 Difference]: Start difference. First operand has 100 places, 94 transitions, 232 flow. Second operand 5 states and 455 transitions. [2021-11-20 06:12:37,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 278 flow [2021-11-20 06:12:37,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 98 transitions, 278 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:37,237 INFO L242 Difference]: Finished difference. Result has 106 places, 95 transitions, 248 flow [2021-11-20 06:12:37,238 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=106, PETRI_TRANSITIONS=95} [2021-11-20 06:12:37,239 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2021-11-20 06:12:37,239 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 95 transitions, 248 flow [2021-11-20 06:12:37,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,240 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:37,240 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:37,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 06:12:37,240 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:37,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:37,240 INFO L85 PathProgramCache]: Analyzing trace with hash 402314257, now seen corresponding path program 1 times [2021-11-20 06:12:37,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:37,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482997667] [2021-11-20 06:12:37,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:37,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:37,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:37,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482997667] [2021-11-20 06:12:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482997667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:37,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:37,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:37,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184224385] [2021-11-20 06:12:37,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:37,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:37,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:37,302 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 109 [2021-11-20 06:12:37,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 95 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:37,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 109 [2021-11-20 06:12:37,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:37,531 INFO L129 PetriNetUnfolder]: 42/656 cut-off events. [2021-11-20 06:12:37,531 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2021-11-20 06:12:37,533 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1183 conditions, 656 events. 42/656 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3214 event pairs, 1 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 1172. Up to 222 conditions per place. [2021-11-20 06:12:37,535 INFO L132 encePairwiseOnDemand]: 98/109 looper letters, 40 selfloop transitions, 6 changer transitions 7/118 dead transitions. [2021-11-20 06:12:37,535 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 412 flow [2021-11-20 06:12:37,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:12:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 347 transitions. [2021-11-20 06:12:37,537 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7958715596330275 [2021-11-20 06:12:37,538 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 347 transitions. [2021-11-20 06:12:37,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 347 transitions. [2021-11-20 06:12:37,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:37,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 347 transitions. [2021-11-20 06:12:37,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,541 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,541 INFO L186 Difference]: Start difference. First operand has 106 places, 95 transitions, 248 flow. Second operand 4 states and 347 transitions. [2021-11-20 06:12:37,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 412 flow [2021-11-20 06:12:37,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 118 transitions, 406 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 06:12:37,546 INFO L242 Difference]: Finished difference. Result has 106 places, 98 transitions, 282 flow [2021-11-20 06:12:37,546 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2021-11-20 06:12:37,547 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 7 predicate places. [2021-11-20 06:12:37,548 INFO L470 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 282 flow [2021-11-20 06:12:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:37,549 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:37,549 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:37,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 06:12:37,549 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1092255810, now seen corresponding path program 1 times [2021-11-20 06:12:37,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:37,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665494944] [2021-11-20 06:12:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:37,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:37,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665494944] [2021-11-20 06:12:37,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665494944] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:37,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111183765] [2021-11-20 06:12:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:37,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:37,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:37,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:12:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:38,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:12:38,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:12:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:12:39,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111183765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:39,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:12:39,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2021-11-20 06:12:39,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854878434] [2021-11-20 06:12:39,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:39,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:12:39,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:39,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:12:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:12:39,023 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 109 [2021-11-20 06:12:39,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 282 flow. Second operand has 27 states, 27 states have (on average 43.7037037037037) internal successors, (1180), 27 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:39,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:39,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 109 [2021-11-20 06:12:39,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:56,307 INFO L129 PetriNetUnfolder]: 62875/102624 cut-off events. [2021-11-20 06:12:56,308 INFO L130 PetriNetUnfolder]: For 11653/11653 co-relation queries the response was YES. [2021-11-20 06:12:56,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215871 conditions, 102624 events. 62875/102624 cut-off events. For 11653/11653 co-relation queries the response was YES. Maximal size of possible extension queue 2010. Compared 875270 event pairs, 6003 based on Foata normal form. 278/102699 useless extension candidates. Maximal degree in co-relation 215860. Up to 10176 conditions per place. [2021-11-20 06:12:57,295 INFO L132 encePairwiseOnDemand]: 78/109 looper letters, 458 selfloop transitions, 166 changer transitions 24/682 dead transitions. [2021-11-20 06:12:57,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 682 transitions, 3056 flow [2021-11-20 06:12:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-20 06:12:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-11-20 06:12:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3179 transitions. [2021-11-20 06:12:57,312 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.4629386922964905 [2021-11-20 06:12:57,312 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3179 transitions. [2021-11-20 06:12:57,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3179 transitions. [2021-11-20 06:12:57,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:57,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3179 transitions. [2021-11-20 06:12:57,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 50.46031746031746) internal successors, (3179), 63 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:57,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 109.0) internal successors, (6976), 64 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:57,347 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 109.0) internal successors, (6976), 64 states have internal predecessors, (6976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:57,347 INFO L186 Difference]: Start difference. First operand has 106 places, 98 transitions, 282 flow. Second operand 63 states and 3179 transitions. [2021-11-20 06:12:57,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 682 transitions, 3056 flow [2021-11-20 06:12:57,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 682 transitions, 2992 flow, removed 21 selfloop flow, removed 2 redundant places. [2021-11-20 06:12:57,841 INFO L242 Difference]: Finished difference. Result has 199 places, 264 transitions, 1457 flow [2021-11-20 06:12:57,842 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=109, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=1457, PETRI_PLACES=199, PETRI_TRANSITIONS=264} [2021-11-20 06:12:57,842 INFO L334 CegarLoopForPetriNet]: 99 programPoint places, 100 predicate places. [2021-11-20 06:12:57,842 INFO L470 AbstractCegarLoop]: Abstraction has has 199 places, 264 transitions, 1457 flow [2021-11-20 06:12:57,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 43.7037037037037) internal successors, (1180), 27 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:57,843 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:57,844 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:57,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:58,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:58,072 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1090444432, now seen corresponding path program 1 times [2021-11-20 06:12:58,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:58,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919711089] [2021-11-20 06:12:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:58,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:58,206 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:12:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:58,259 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:12:58,263 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:12:58,264 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 2 remaining) [2021-11-20 06:12:58,264 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-20 06:12:58,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-20 06:12:58,265 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2021-11-20 06:12:58,265 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-11-20 06:12:58,265 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,283 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,284 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,285 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,286 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,287 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,288 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,289 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,289 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,289 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,289 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,289 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,290 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,291 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,292 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,293 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,293 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,294 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,295 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,295 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,295 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,295 WARN L322 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,295 WARN L322 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,296 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,296 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,296 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,296 WARN L322 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,297 WARN L322 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,297 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,297 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,297 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,297 WARN L322 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,298 WARN L322 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,298 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,298 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,298 WARN L322 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,299 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,299 WARN L322 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,300 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,300 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,300 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,300 WARN L322 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,300 WARN L322 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-20 06:12:58,302 INFO L148 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2021-11-20 06:12:58,305 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:58,305 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 [2021-11-20 06:12:58,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:12:58,307 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 116 places, 116 transitions, 292 flow [2021-11-20 06:12:58,440 INFO L129 PetriNetUnfolder]: 189/1327 cut-off events. [2021-11-20 06:12:58,440 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2021-11-20 06:12:58,443 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1438 conditions, 1327 events. 189/1327 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 7613 event pairs, 23 based on Foata normal form. 0/1122 useless extension candidates. Maximal degree in co-relation 746. Up to 80 conditions per place. [2021-11-20 06:12:58,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 116 transitions, 292 flow [2021-11-20 06:12:58,447 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 106 transitions, 272 flow [2021-11-20 06:12:58,451 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-11-20 06:12:58,451 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-20 06:12:58,452 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:58,452 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] [2021-11-20 06:12:58,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:58,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1138952928, now seen corresponding path program 1 times [2021-11-20 06:12:58,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:58,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898468657] [2021-11-20 06:12:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:58,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:58,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:58,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898468657] [2021-11-20 06:12:58,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898468657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:58,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:58,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:58,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378273617] [2021-11-20 06:12:58,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:58,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:58,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:58,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:58,472 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 116 [2021-11-20 06:12:58,472 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 272 flow. Second operand has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,472 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:58,473 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 116 [2021-11-20 06:12:58,473 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:58,597 INFO L129 PetriNetUnfolder]: 86/936 cut-off events. [2021-11-20 06:12:58,597 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2021-11-20 06:12:58,600 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 936 events. 86/936 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4964 event pairs, 23 based on Foata normal form. 71/936 useless extension candidates. Maximal degree in co-relation 584. Up to 86 conditions per place. [2021-11-20 06:12:58,603 INFO L132 encePairwiseOnDemand]: 112/116 looper letters, 10 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2021-11-20 06:12:58,603 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 102 transitions, 284 flow [2021-11-20 06:12:58,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:58,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-20 06:12:58,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 214 transitions. [2021-11-20 06:12:58,605 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9224137931034483 [2021-11-20 06:12:58,605 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 214 transitions. [2021-11-20 06:12:58,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 214 transitions. [2021-11-20 06:12:58,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:58,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 214 transitions. [2021-11-20 06:12:58,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,609 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,609 INFO L186 Difference]: Start difference. First operand has 107 places, 106 transitions, 272 flow. Second operand 2 states and 214 transitions. [2021-11-20 06:12:58,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 102 transitions, 284 flow [2021-11-20 06:12:58,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 102 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:58,612 INFO L242 Difference]: Finished difference. Result has 108 places, 101 transitions, 262 flow [2021-11-20 06:12:58,612 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=262, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2021-11-20 06:12:58,613 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2021-11-20 06:12:58,614 INFO L470 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 262 flow [2021-11-20 06:12:58,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,614 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:58,614 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] [2021-11-20 06:12:58,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-20 06:12:58,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1009870209, now seen corresponding path program 1 times [2021-11-20 06:12:58,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:58,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592649422] [2021-11-20 06:12:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:58,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:58,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:58,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:58,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592649422] [2021-11-20 06:12:58,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592649422] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:58,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:58,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:58,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339826844] [2021-11-20 06:12:58,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:58,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:58,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:58,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:58,656 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 116 [2021-11-20 06:12:58,657 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,657 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:58,657 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 116 [2021-11-20 06:12:58,657 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:58,894 INFO L129 PetriNetUnfolder]: 86/1191 cut-off events. [2021-11-20 06:12:58,894 INFO L130 PetriNetUnfolder]: For 285/285 co-relation queries the response was YES. [2021-11-20 06:12:58,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1710 conditions, 1191 events. 86/1191 cut-off events. For 285/285 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 7134 event pairs, 23 based on Foata normal form. 32/1121 useless extension candidates. Maximal degree in co-relation 1702. Up to 279 conditions per place. [2021-11-20 06:12:58,901 INFO L132 encePairwiseOnDemand]: 111/116 looper letters, 16 selfloop transitions, 2 changer transitions 3/105 dead transitions. [2021-11-20 06:12:58,901 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 312 flow [2021-11-20 06:12:58,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-11-20 06:12:58,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 482 transitions. [2021-11-20 06:12:58,906 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8310344827586207 [2021-11-20 06:12:58,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 482 transitions. [2021-11-20 06:12:58,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 482 transitions. [2021-11-20 06:12:58,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:58,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 482 transitions. [2021-11-20 06:12:58,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,910 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 116.0) internal successors, (696), 6 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,910 INFO L186 Difference]: Start difference. First operand has 108 places, 101 transitions, 262 flow. Second operand 5 states and 482 transitions. [2021-11-20 06:12:58,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 312 flow [2021-11-20 06:12:58,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 105 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-20 06:12:58,913 INFO L242 Difference]: Finished difference. Result has 114 places, 102 transitions, 278 flow [2021-11-20 06:12:58,914 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=114, PETRI_TRANSITIONS=102} [2021-11-20 06:12:58,914 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2021-11-20 06:12:58,915 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 102 transitions, 278 flow [2021-11-20 06:12:58,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,915 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:58,915 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:58,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-20 06:12:58,916 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:58,916 INFO L85 PathProgramCache]: Analyzing trace with hash 202686097, now seen corresponding path program 1 times [2021-11-20 06:12:58,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:58,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551877506] [2021-11-20 06:12:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:58,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:58,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:58,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551877506] [2021-11-20 06:12:58,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551877506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:58,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:58,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:58,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849608304] [2021-11-20 06:12:58,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:58,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:58,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:58,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:58,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:58,963 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 116 [2021-11-20 06:12:58,963 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 102 transitions, 278 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:58,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:12:58,964 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 116 [2021-11-20 06:12:58,964 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-20 06:12:59,219 INFO L129 PetriNetUnfolder]: 95/1239 cut-off events. [2021-11-20 06:12:59,219 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2021-11-20 06:12:59,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1239 events. 95/1239 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 7807 event pairs, 7 based on Foata normal form. 0/1135 useless extension candidates. Maximal degree in co-relation 2255. Up to 454 conditions per place. [2021-11-20 06:12:59,228 INFO L132 encePairwiseOnDemand]: 105/116 looper letters, 43 selfloop transitions, 6 changer transitions 7/126 dead transitions. [2021-11-20 06:12:59,228 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 126 transitions, 453 flow [2021-11-20 06:12:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-11-20 06:12:59,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2021-11-20 06:12:59,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7974137931034483 [2021-11-20 06:12:59,230 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2021-11-20 06:12:59,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2021-11-20 06:12:59,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-20 06:12:59,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2021-11-20 06:12:59,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:59,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:59,233 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:59,234 INFO L186 Difference]: Start difference. First operand has 114 places, 102 transitions, 278 flow. Second operand 4 states and 370 transitions. [2021-11-20 06:12:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 126 transitions, 453 flow [2021-11-20 06:12:59,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 447 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-11-20 06:12:59,241 INFO L242 Difference]: Finished difference. Result has 114 places, 105 transitions, 312 flow [2021-11-20 06:12:59,241 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=114, PETRI_TRANSITIONS=105} [2021-11-20 06:12:59,242 INFO L334 CegarLoopForPetriNet]: 107 programPoint places, 7 predicate places. [2021-11-20 06:12:59,242 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 105 transitions, 312 flow [2021-11-20 06:12:59,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:12:59,243 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-20 06:12:59,243 INFO L254 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:59,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-20 06:12:59,243 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION] === [2021-11-20 06:12:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:59,244 INFO L85 PathProgramCache]: Analyzing trace with hash -796867189, now seen corresponding path program 1 times [2021-11-20 06:12:59,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:59,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925912086] [2021-11-20 06:12:59,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:59,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:12:59,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925912086] [2021-11-20 06:12:59,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925912086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582881027] [2021-11-20 06:12:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:59,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:59,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:59,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:59,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d75f299c-4b49-4570-9573-5288b8be286f/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:12:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:12:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:00,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:13:00,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:13:00,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582881027] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:13:00,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:13:00,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2021-11-20 06:13:00,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343556335] [2021-11-20 06:13:00,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:00,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 06:13:00,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:00,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 06:13:00,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:13:00,386 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 116 [2021-11-20 06:13:00,388 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 105 transitions, 312 flow. Second operand has 27 states, 27 states have (on average 45.7037037037037) internal successors, (1234), 27 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:13:00,388 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-20 06:13:00,388 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 116 [2021-11-20 06:13:00,388 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand