./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX --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 a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:44:57,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:44:57,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:44:57,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:44:57,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:44:57,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:44:57,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:44:57,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:44:57,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:44:57,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:44:57,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:44:57,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:44:57,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:44:57,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:44:57,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:44:57,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:44:57,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:44:57,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:44:57,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:44:57,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:44:57,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:44:57,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:44:57,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:44:57,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:44:57,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:44:57,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:44:57,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:44:57,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:44:57,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:44:57,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:44:57,293 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:44:57,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:44:57,296 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:44:57,297 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:44:57,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:44:57,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:44:57,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:44:57,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:44:57,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:44:57,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:44:57,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:44:57,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 10:44:57,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:44:57,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:44:57,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:44:57,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:44:57,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:44:57,352 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:44:57,352 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:44:57,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:44:57,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:44:57,353 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:44:57,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:44:57,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:44:57,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 10:44:57,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:44:57,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 10:44:57,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:44:57,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 10:44:57,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:44:57,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 10:44:57,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:44:57,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:44:57,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:44:57,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:57,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:44:57,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:44:57,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 10:44:57,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:44:57,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:44:57,358 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 10:44:57,360 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 10:44:57,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 10:44:57,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:44:57,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a938b9e3b803ef0b08d2618a78ac055be54a6e48f84c6853aab11e3467af8157 [2021-11-09 10:44:57,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:44:57,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:44:57,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:44:57,740 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:44:57,741 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:44:57,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-09 10:44:57,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/data/e5d7dfe01/52fe8e34633947b4997a45b2a0bdb806/FLAGd97f5e085 [2021-11-09 10:44:58,367 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:44:58,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/sv-benchmarks/c/pthread/fib_unsafe-7.i [2021-11-09 10:44:58,383 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/data/e5d7dfe01/52fe8e34633947b4997a45b2a0bdb806/FLAGd97f5e085 [2021-11-09 10:44:58,669 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/data/e5d7dfe01/52fe8e34633947b4997a45b2a0bdb806 [2021-11-09 10:44:58,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:44:58,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 10:44:58,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:58,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:44:58,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:44:58,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:58" (1/1) ... [2021-11-09 10:44:58,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b077582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:58, skipping insertion in model container [2021-11-09 10:44:58,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:58" (1/1) ... [2021-11-09 10:44:58,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:44:58,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:44:59,153 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-09 10:44:59,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:59,168 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:44:59,223 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/sv-benchmarks/c/pthread/fib_unsafe-7.i[30811,30824] [2021-11-09 10:44:59,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:44:59,264 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:44:59,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59 WrapperNode [2021-11-09 10:44:59,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:44:59,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:59,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 10:44:59,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 10:44:59,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,290 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 10:44:59,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:44:59,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:44:59,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:44:59,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:44:59,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:44:59,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:44:59,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:44:59,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (1/1) ... [2021-11-09 10:44:59,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:44:59,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:44:59,374 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:44:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:44:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-11-09 10:44:59,422 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-11-09 10:44:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-11-09 10:44:59,423 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-11-09 10:44:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:44:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-09 10:44:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:44:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:44:59,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:44:59,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-09 10:44:59,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:44:59,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:44:59,426 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-09 10:44:59,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:44:59,845 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-09 10:44:59,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:59 BoogieIcfgContainer [2021-11-09 10:44:59,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:44:59,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:44:59,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:44:59,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:44:59,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:58" (1/3) ... [2021-11-09 10:44:59,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73969d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:59, skipping insertion in model container [2021-11-09 10:44:59,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:59" (2/3) ... [2021-11-09 10:44:59,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73969d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:59, skipping insertion in model container [2021-11-09 10:44:59,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:59" (3/3) ... [2021-11-09 10:44:59,876 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2021-11-09 10:44:59,881 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-09 10:44:59,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:44:59,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 10:44:59,882 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-09 10:44:59,952 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,952 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,952 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,952 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,953 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,953 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,953 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,953 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,954 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,954 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,954 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,955 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,955 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,955 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,956 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,956 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,956 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,956 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,957 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,957 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,957 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,957 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,958 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,958 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,958 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,958 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,959 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,959 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,960 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,960 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,960 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,961 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,961 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,961 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,962 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,962 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,985 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,986 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,986 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,986 WARN L322 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,987 WARN L322 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,992 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,992 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,992 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,993 WARN L322 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:44:59,993 WARN L322 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-09 10:45:00,003 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-11-09 10:45:00,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:45:00,086 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 [2021-11-09 10:45:00,087 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-09 10:45:00,113 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 10:45:00,178 INFO L129 PetriNetUnfolder]: 7/88 cut-off events. [2021-11-09 10:45:00,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:45:00,183 INFO L84 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 88 events. 7/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2021-11-09 10:45:00,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 90 transitions, 190 flow [2021-11-09 10:45:00,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 88 transitions, 182 flow [2021-11-09 10:45:00,222 INFO L129 PetriNetUnfolder]: 7/80 cut-off events. [2021-11-09 10:45:00,222 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:45:00,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:00,223 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] [2021-11-09 10:45:00,224 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:00,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:00,229 INFO L85 PathProgramCache]: Analyzing trace with hash -2010782680, now seen corresponding path program 1 times [2021-11-09 10:45:00,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:00,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350727513] [2021-11-09 10:45:00,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:00,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:00,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350727513] [2021-11-09 10:45:00,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350727513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:00,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:00,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 10:45:00,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629669171] [2021-11-09 10:45:00,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 10:45:00,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:00,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 10:45:00,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 10:45:00,599 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 90 [2021-11-09 10:45:00,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 182 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) [2021-11-09 10:45:00,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:00,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 90 [2021-11-09 10:45:00,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:00,628 INFO L129 PetriNetUnfolder]: 3/83 cut-off events. [2021-11-09 10:45:00,628 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:45:00,629 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 83 events. 3/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 4/83 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2021-11-09 10:45:00,630 INFO L132 encePairwiseOnDemand]: 86/90 looper letters, 0 selfloop transitions, 0 changer transitions 0/83 dead transitions. [2021-11-09 10:45:00,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 83 transitions, 172 flow [2021-11-09 10:45:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 10:45:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-11-09 10:45:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 174 transitions. [2021-11-09 10:45:00,644 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9666666666666667 [2021-11-09 10:45:00,644 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 174 transitions. [2021-11-09 10:45:00,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 174 transitions. [2021-11-09 10:45:00,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:00,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 174 transitions. [2021-11-09 10:45:00,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.0) internal successors, (174), 2 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,658 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,660 INFO L186 Difference]: Start difference. First operand has 88 places, 88 transitions, 182 flow. Second operand 2 states and 174 transitions. [2021-11-09 10:45:00,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 83 transitions, 172 flow [2021-11-09 10:45:00,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 83 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-11-09 10:45:00,667 INFO L242 Difference]: Finished difference. Result has 86 places, 83 transitions, 170 flow [2021-11-09 10:45:00,670 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=170, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2021-11-09 10:45:00,671 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2021-11-09 10:45:00,671 INFO L470 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 170 flow [2021-11-09 10:45:00,671 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) [2021-11-09 10:45:00,672 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:00,672 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] [2021-11-09 10:45:00,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:45:00,673 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:00,673 INFO L85 PathProgramCache]: Analyzing trace with hash -267972345, now seen corresponding path program 1 times [2021-11-09 10:45:00,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:00,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641107590] [2021-11-09 10:45:00,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:00,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:00,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641107590] [2021-11-09 10:45:00,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641107590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:45:00,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:45:00,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:45:00,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085493631] [2021-11-09 10:45:00,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:45:00,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:45:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:45:00,781 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 90 [2021-11-09 10:45:00,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:00,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 90 [2021-11-09 10:45:00,783 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:00,820 INFO L129 PetriNetUnfolder]: 3/89 cut-off events. [2021-11-09 10:45:00,820 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-11-09 10:45:00,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 89 events. 3/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2021-11-09 10:45:00,822 INFO L132 encePairwiseOnDemand]: 87/90 looper letters, 7 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2021-11-09 10:45:00,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 194 flow [2021-11-09 10:45:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:45:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-11-09 10:45:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2021-11-09 10:45:00,825 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9148148148148149 [2021-11-09 10:45:00,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2021-11-09 10:45:00,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2021-11-09 10:45:00,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:00,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2021-11-09 10:45:00,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,831 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 90.0) internal successors, (360), 4 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,832 INFO L186 Difference]: Start difference. First operand has 86 places, 83 transitions, 170 flow. Second operand 3 states and 247 transitions. [2021-11-09 10:45:00,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 194 flow [2021-11-09 10:45:00,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 86 transitions, 194 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-11-09 10:45:00,836 INFO L242 Difference]: Finished difference. Result has 89 places, 84 transitions, 182 flow [2021-11-09 10:45:00,836 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=89, PETRI_TRANSITIONS=84} [2021-11-09 10:45:00,837 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2021-11-09 10:45:00,837 INFO L470 AbstractCegarLoop]: Abstraction has has 89 places, 84 transitions, 182 flow [2021-11-09 10:45:00,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:00,838 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:00,838 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] [2021-11-09 10:45:00,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:45:00,838 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2020520326, now seen corresponding path program 1 times [2021-11-09 10:45:00,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:00,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336695259] [2021-11-09 10:45:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:00,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:00,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336695259] [2021-11-09 10:45:00,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336695259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:00,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551024972] [2021-11-09 10:45:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:00,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:00,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:00,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:00,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:45:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:45:01,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:01,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551024972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:01,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:01,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-09 10:45:01,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789415911] [2021-11-09 10:45:01,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:45:01,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:01,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:45:01,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:45:01,363 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:01,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 84 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:01,365 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:01,365 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:01,424 INFO L129 PetriNetUnfolder]: 3/96 cut-off events. [2021-11-09 10:45:01,424 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-11-09 10:45:01,426 INFO L84 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 96 events. 3/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/94 useless extension candidates. Maximal degree in co-relation 121. Up to 7 conditions per place. [2021-11-09 10:45:01,427 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 10 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2021-11-09 10:45:01,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 226 flow [2021-11-09 10:45:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:45:01,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-11-09 10:45:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2021-11-09 10:45:01,431 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8851851851851852 [2021-11-09 10:45:01,431 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2021-11-09 10:45:01,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2021-11-09 10:45:01,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:01,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2021-11-09 10:45:01,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 90.0) internal successors, (630), 7 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,439 INFO L186 Difference]: Start difference. First operand has 89 places, 84 transitions, 182 flow. Second operand 6 states and 478 transitions. [2021-11-09 10:45:01,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 226 flow [2021-11-09 10:45:01,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 90 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-11-09 10:45:01,443 INFO L242 Difference]: Finished difference. Result has 96 places, 87 transitions, 212 flow [2021-11-09 10:45:01,444 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2021-11-09 10:45:01,444 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 8 predicate places. [2021-11-09 10:45:01,445 INFO L470 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 212 flow [2021-11-09 10:45:01,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 78.71428571428571) internal successors, (551), 7 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:01,446 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:01,446 INFO L254 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:01,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:01,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:01,660 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1122522151, now seen corresponding path program 2 times [2021-11-09 10:45:01,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:01,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406523501] [2021-11-09 10:45:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:01,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:01,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:01,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406523501] [2021-11-09 10:45:01,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406523501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:01,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887067183] [2021-11-09 10:45:01,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:01,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:01,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:01,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:45:01,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:01,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:01,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 10:45:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:02,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887067183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:02,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:02,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-09 10:45:02,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226740944] [2021-11-09 10:45:02,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:45:02,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:02,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:45:02,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:45:02,163 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:02,164 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 212 flow. Second operand has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,165 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:02,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:02,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:02,246 INFO L129 PetriNetUnfolder]: 3/103 cut-off events. [2021-11-09 10:45:02,246 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-11-09 10:45:02,250 INFO L84 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 103 events. 3/103 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/101 useless extension candidates. Maximal degree in co-relation 148. Up to 7 conditions per place. [2021-11-09 10:45:02,251 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 11 selfloop transitions, 8 changer transitions 0/94 dead transitions. [2021-11-09 10:45:02,251 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 94 transitions, 274 flow [2021-11-09 10:45:02,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:45:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-11-09 10:45:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2021-11-09 10:45:02,255 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8802469135802469 [2021-11-09 10:45:02,256 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2021-11-09 10:45:02,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2021-11-09 10:45:02,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:02,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2021-11-09 10:45:02,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,265 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,265 INFO L186 Difference]: Start difference. First operand has 96 places, 87 transitions, 212 flow. Second operand 9 states and 713 transitions. [2021-11-09 10:45:02,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 94 transitions, 274 flow [2021-11-09 10:45:02,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 268 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-11-09 10:45:02,275 INFO L242 Difference]: Finished difference. Result has 105 places, 90 transitions, 250 flow [2021-11-09 10:45:02,275 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=90} [2021-11-09 10:45:02,275 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 17 predicate places. [2021-11-09 10:45:02,276 INFO L470 AbstractCegarLoop]: Abstraction has has 105 places, 90 transitions, 250 flow [2021-11-09 10:45:02,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 78.77777777777777) internal successors, (709), 9 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,278 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:02,278 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:02,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:02,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:02,496 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:02,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1095871078, now seen corresponding path program 3 times [2021-11-09 10:45:02,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:02,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40410030] [2021-11-09 10:45:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:02,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:02,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:02,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40410030] [2021-11-09 10:45:02,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40410030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:02,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583804673] [2021-11-09 10:45:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:02,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:02,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:02,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:45:02,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 10:45:02,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:02,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 10:45:02,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:02,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583804673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:02,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:02,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-11-09 10:45:02,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83432043] [2021-11-09 10:45:02,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:45:02,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:02,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:45:02,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:45:02,961 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:02,962 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 90 transitions, 250 flow. Second operand has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:02,963 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:02,963 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:02,963 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:03,101 INFO L129 PetriNetUnfolder]: 3/110 cut-off events. [2021-11-09 10:45:03,102 INFO L130 PetriNetUnfolder]: For 41/41 co-relation queries the response was YES. [2021-11-09 10:45:03,103 INFO L84 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 110 events. 3/110 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 179. Up to 7 conditions per place. [2021-11-09 10:45:03,104 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 12 selfloop transitions, 11 changer transitions 0/98 dead transitions. [2021-11-09 10:45:03,105 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 98 transitions, 330 flow [2021-11-09 10:45:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 10:45:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-11-09 10:45:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 948 transitions. [2021-11-09 10:45:03,110 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8777777777777778 [2021-11-09 10:45:03,110 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 948 transitions. [2021-11-09 10:45:03,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 948 transitions. [2021-11-09 10:45:03,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:03,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 948 transitions. [2021-11-09 10:45:03,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.0) internal successors, (948), 12 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,119 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 90.0) internal successors, (1170), 13 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,119 INFO L186 Difference]: Start difference. First operand has 105 places, 90 transitions, 250 flow. Second operand 12 states and 948 transitions. [2021-11-09 10:45:03,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 98 transitions, 330 flow [2021-11-09 10:45:03,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 312 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-11-09 10:45:03,133 INFO L242 Difference]: Finished difference. Result has 114 places, 93 transitions, 288 flow [2021-11-09 10:45:03,137 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=288, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2021-11-09 10:45:03,138 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 26 predicate places. [2021-11-09 10:45:03,138 INFO L470 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 288 flow [2021-11-09 10:45:03,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 78.81818181818181) internal successors, (867), 11 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:03,139 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:03,139 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:03,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-09 10:45:03,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:03,344 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 541433671, now seen corresponding path program 4 times [2021-11-09 10:45:03,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:03,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845467413] [2021-11-09 10:45:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:03,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:03,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845467413] [2021-11-09 10:45:03,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845467413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:03,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157536318] [2021-11-09 10:45:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:03,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:03,503 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:03,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:45:03,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:03,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:03,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 10:45:03,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:04,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157536318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:04,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:04,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-11-09 10:45:04,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287611841] [2021-11-09 10:45:04,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:45:04,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:04,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:45:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:45:04,853 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:45:04,856 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 288 flow. Second operand has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:04,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:04,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:45:04,856 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:07,444 INFO L129 PetriNetUnfolder]: 685/1417 cut-off events. [2021-11-09 10:45:07,444 INFO L130 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2021-11-09 10:45:07,452 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2892 conditions, 1417 events. 685/1417 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 6691 event pairs, 2 based on Foata normal form. 7/1357 useless extension candidates. Maximal degree in co-relation 2878. Up to 342 conditions per place. [2021-11-09 10:45:07,466 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 189 selfloop transitions, 158 changer transitions 11/405 dead transitions. [2021-11-09 10:45:07,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 405 transitions, 1997 flow [2021-11-09 10:45:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-09 10:45:07,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-11-09 10:45:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4444 transitions. [2021-11-09 10:45:07,482 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6764079147640791 [2021-11-09 10:45:07,482 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4444 transitions. [2021-11-09 10:45:07,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4444 transitions. [2021-11-09 10:45:07,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:07,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4444 transitions. [2021-11-09 10:45:07,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 60.87671232876713) internal successors, (4444), 73 states have internal predecessors, (4444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,521 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 90.0) internal successors, (6660), 74 states have internal predecessors, (6660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,522 INFO L186 Difference]: Start difference. First operand has 114 places, 93 transitions, 288 flow. Second operand 73 states and 4444 transitions. [2021-11-09 10:45:07,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 405 transitions, 1997 flow [2021-11-09 10:45:07,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 405 transitions, 1883 flow, removed 28 selfloop flow, removed 8 redundant places. [2021-11-09 10:45:07,538 INFO L242 Difference]: Finished difference. Result has 216 places, 260 transitions, 1448 flow [2021-11-09 10:45:07,539 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=1448, PETRI_PLACES=216, PETRI_TRANSITIONS=260} [2021-11-09 10:45:07,539 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 128 predicate places. [2021-11-09 10:45:07,539 INFO L470 AbstractCegarLoop]: Abstraction has has 216 places, 260 transitions, 1448 flow [2021-11-09 10:45:07,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 59.407407407407405) internal successors, (1604), 27 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:07,541 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:07,541 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:07,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:07,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 10:45:07,763 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash 645980809, now seen corresponding path program 1 times [2021-11-09 10:45:07,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:07,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414268648] [2021-11-09 10:45:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:07,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:07,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:07,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414268648] [2021-11-09 10:45:07,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414268648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:07,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893746128] [2021-11-09 10:45:07,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:07,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:07,955 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:07,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:45:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 10:45:08,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:08,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893746128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:08,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:08,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-11-09 10:45:08,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682457974] [2021-11-09 10:45:08,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:45:08,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:08,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:45:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:45:08,408 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:08,410 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 260 transitions, 1448 flow. Second operand has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,410 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:08,410 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:08,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:08,913 INFO L129 PetriNetUnfolder]: 365/1110 cut-off events. [2021-11-09 10:45:08,913 INFO L130 PetriNetUnfolder]: For 73499/73629 co-relation queries the response was YES. [2021-11-09 10:45:08,942 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8265 conditions, 1110 events. 365/1110 cut-off events. For 73499/73629 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6089 event pairs, 53 based on Foata normal form. 48/1076 useless extension candidates. Maximal degree in co-relation 8213. Up to 259 conditions per place. [2021-11-09 10:45:08,970 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 14 selfloop transitions, 56 changer transitions 0/270 dead transitions. [2021-11-09 10:45:08,970 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 1666 flow [2021-11-09 10:45:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:45:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-11-09 10:45:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1418 transitions. [2021-11-09 10:45:08,974 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8753086419753087 [2021-11-09 10:45:08,975 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1418 transitions. [2021-11-09 10:45:08,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1418 transitions. [2021-11-09 10:45:08,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:08,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1418 transitions. [2021-11-09 10:45:08,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.77777777777777) internal successors, (1418), 18 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,985 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 90.0) internal successors, (1710), 19 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:08,985 INFO L186 Difference]: Start difference. First operand has 216 places, 260 transitions, 1448 flow. Second operand 18 states and 1418 transitions. [2021-11-09 10:45:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 1666 flow [2021-11-09 10:45:09,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 270 transitions, 1507 flow, removed 40 selfloop flow, removed 11 redundant places. [2021-11-09 10:45:09,105 INFO L242 Difference]: Finished difference. Result has 217 places, 263 transitions, 1471 flow [2021-11-09 10:45:09,108 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1471, PETRI_PLACES=217, PETRI_TRANSITIONS=263} [2021-11-09 10:45:09,108 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 129 predicate places. [2021-11-09 10:45:09,108 INFO L470 AbstractCegarLoop]: Abstraction has has 217 places, 263 transitions, 1471 flow [2021-11-09 10:45:09,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:09,109 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:09,109 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:09,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:09,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:09,324 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1305512388, now seen corresponding path program 2 times [2021-11-09 10:45:09,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:09,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292969154] [2021-11-09 10:45:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:09,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:09,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:09,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292969154] [2021-11-09 10:45:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292969154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:09,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055361562] [2021-11-09 10:45:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:09,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:09,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:09,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:45:09,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:09,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:45:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:10,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055361562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:10,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:10,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-11-09 10:45:10,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123694876] [2021-11-09 10:45:10,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 10:45:10,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 10:45:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-09 10:45:10,043 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:10,045 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 263 transitions, 1471 flow. Second operand has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,045 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:10,045 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:10,045 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:10,631 INFO L129 PetriNetUnfolder]: 409/1187 cut-off events. [2021-11-09 10:45:10,631 INFO L130 PetriNetUnfolder]: For 84677/84820 co-relation queries the response was YES. [2021-11-09 10:45:10,663 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9476 conditions, 1187 events. 409/1187 cut-off events. For 84677/84820 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 6358 event pairs, 65 based on Foata normal form. 69/1165 useless extension candidates. Maximal degree in co-relation 9420. Up to 302 conditions per place. [2021-11-09 10:45:10,694 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 15 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2021-11-09 10:45:10,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 274 transitions, 1707 flow [2021-11-09 10:45:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 10:45:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-11-09 10:45:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1653 transitions. [2021-11-09 10:45:10,698 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8746031746031746 [2021-11-09 10:45:10,698 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1653 transitions. [2021-11-09 10:45:10,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1653 transitions. [2021-11-09 10:45:10,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:10,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1653 transitions. [2021-11-09 10:45:10,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.71428571428571) internal successors, (1653), 21 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,709 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 90.0) internal successors, (1980), 22 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,709 INFO L186 Difference]: Start difference. First operand has 217 places, 263 transitions, 1471 flow. Second operand 21 states and 1653 transitions. [2021-11-09 10:45:10,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 274 transitions, 1707 flow [2021-11-09 10:45:10,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 274 transitions, 1574 flow, removed 19 selfloop flow, removed 13 redundant places. [2021-11-09 10:45:10,826 INFO L242 Difference]: Finished difference. Result has 227 places, 266 transitions, 1526 flow [2021-11-09 10:45:10,827 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1526, PETRI_PLACES=227, PETRI_TRANSITIONS=266} [2021-11-09 10:45:10,827 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 139 predicate places. [2021-11-09 10:45:10,827 INFO L470 AbstractCegarLoop]: Abstraction has has 227 places, 266 transitions, 1526 flow [2021-11-09 10:45:10,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.88235294117646) internal successors, (1341), 17 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:10,828 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:10,828 INFO L254 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:10,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:11,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:11,055 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1913325353, now seen corresponding path program 3 times [2021-11-09 10:45:11,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:11,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917094650] [2021-11-09 10:45:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:11,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:11,220 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:11,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:11,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917094650] [2021-11-09 10:45:11,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917094650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:11,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819506468] [2021-11-09 10:45:11,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:11,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:11,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:11,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:45:11,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:45:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:45:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:11,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819506468] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:11,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:11,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-11-09 10:45:11,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267566914] [2021-11-09 10:45:11,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:45:11,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:45:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:45:11,825 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:11,826 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 266 transitions, 1526 flow. Second operand has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:11,827 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:11,827 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:11,827 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:12,621 INFO L129 PetriNetUnfolder]: 456/1347 cut-off events. [2021-11-09 10:45:12,622 INFO L130 PetriNetUnfolder]: For 101824/101970 co-relation queries the response was YES. [2021-11-09 10:45:12,659 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11125 conditions, 1347 events. 456/1347 cut-off events. For 101824/101970 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7362 event pairs, 77 based on Foata normal form. 49/1282 useless extension candidates. Maximal degree in co-relation 11066. Up to 358 conditions per place. [2021-11-09 10:45:12,696 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 16 selfloop transitions, 62 changer transitions 0/278 dead transitions. [2021-11-09 10:45:12,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 278 transitions, 1780 flow [2021-11-09 10:45:12,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:45:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-11-09 10:45:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1888 transitions. [2021-11-09 10:45:12,700 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8740740740740741 [2021-11-09 10:45:12,701 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1888 transitions. [2021-11-09 10:45:12,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1888 transitions. [2021-11-09 10:45:12,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:12,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1888 transitions. [2021-11-09 10:45:12,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 78.66666666666667) internal successors, (1888), 24 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,711 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 90.0) internal successors, (2250), 25 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,712 INFO L186 Difference]: Start difference. First operand has 227 places, 266 transitions, 1526 flow. Second operand 24 states and 1888 transitions. [2021-11-09 10:45:12,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 278 transitions, 1780 flow [2021-11-09 10:45:12,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 278 transitions, 1624 flow, removed 22 selfloop flow, removed 17 redundant places. [2021-11-09 10:45:12,828 INFO L242 Difference]: Finished difference. Result has 236 places, 269 transitions, 1570 flow [2021-11-09 10:45:12,829 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1570, PETRI_PLACES=236, PETRI_TRANSITIONS=269} [2021-11-09 10:45:12,829 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 148 predicate places. [2021-11-09 10:45:12,829 INFO L470 AbstractCegarLoop]: Abstraction has has 236 places, 269 transitions, 1570 flow [2021-11-09 10:45:12,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 78.89473684210526) internal successors, (1499), 19 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:12,830 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:12,831 INFO L254 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:12,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:13,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:13,043 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1779560740, now seen corresponding path program 4 times [2021-11-09 10:45:13,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:13,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825752491] [2021-11-09 10:45:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:13,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:13,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:13,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825752491] [2021-11-09 10:45:13,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825752491] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:13,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802930068] [2021-11-09 10:45:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:13,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:13,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:13,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:13,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:45:13,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:13,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:45:13,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 117 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:15,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802930068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:15,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:15,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 48 [2021-11-09 10:45:15,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254621310] [2021-11-09 10:45:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 10:45:15,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 10:45:15,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 10:45:15,734 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:45:15,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 269 transitions, 1570 flow. Second operand has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:15,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:15,739 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:45:15,739 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:24,374 INFO L129 PetriNetUnfolder]: 1649/3544 cut-off events. [2021-11-09 10:45:24,374 INFO L130 PetriNetUnfolder]: For 310989/311405 co-relation queries the response was YES. [2021-11-09 10:45:24,403 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31770 conditions, 3544 events. 1649/3544 cut-off events. For 310989/311405 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 21074 event pairs, 0 based on Foata normal form. 176/3528 useless extension candidates. Maximal degree in co-relation 31708. Up to 917 conditions per place. [2021-11-09 10:45:24,482 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 343 selfloop transitions, 541 changer transitions 0/931 dead transitions. [2021-11-09 10:45:24,482 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 931 transitions, 14911 flow [2021-11-09 10:45:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-11-09 10:45:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-11-09 10:45:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 11185 transitions. [2021-11-09 10:45:24,507 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6681600955794504 [2021-11-09 10:45:24,507 INFO L72 ComplementDD]: Start complementDD. Operand 186 states and 11185 transitions. [2021-11-09 10:45:24,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 186 states and 11185 transitions. [2021-11-09 10:45:24,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:24,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 186 states and 11185 transitions. [2021-11-09 10:45:24,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 187 states, 186 states have (on average 60.134408602150536) internal successors, (11185), 186 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:24,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:24,574 INFO L81 ComplementDD]: Finished complementDD. Result has 187 states, 187 states have (on average 90.0) internal successors, (16830), 187 states have internal predecessors, (16830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:24,574 INFO L186 Difference]: Start difference. First operand has 236 places, 269 transitions, 1570 flow. Second operand 186 states and 11185 transitions. [2021-11-09 10:45:24,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 931 transitions, 14911 flow [2021-11-09 10:45:25,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 931 transitions, 14417 flow, removed 125 selfloop flow, removed 20 redundant places. [2021-11-09 10:45:25,202 INFO L242 Difference]: Finished difference. Result has 471 places, 689 transitions, 8650 flow [2021-11-09 10:45:25,203 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=186, PETRI_FLOW=8650, PETRI_PLACES=471, PETRI_TRANSITIONS=689} [2021-11-09 10:45:25,203 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 383 predicate places. [2021-11-09 10:45:25,204 INFO L470 AbstractCegarLoop]: Abstraction has has 471 places, 689 transitions, 8650 flow [2021-11-09 10:45:25,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 59.125) internal successors, (2838), 48 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:25,205 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:25,206 INFO L254 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:25,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:25,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 10:45:25,419 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:25,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1747839863, now seen corresponding path program 1 times [2021-11-09 10:45:25,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:25,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301010025] [2021-11-09 10:45:25,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:25,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:25,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:25,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301010025] [2021-11-09 10:45:25,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301010025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:25,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506380796] [2021-11-09 10:45:25,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:25,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:25,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:25,650 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:25,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:45:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 10:45:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:26,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506380796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:26,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:26,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-11-09 10:45:26,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422970471] [2021-11-09 10:45:26,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:45:26,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:45:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:45:26,485 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:26,486 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 689 transitions, 8650 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:26,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:26,487 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:26,487 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:28,539 INFO L129 PetriNetUnfolder]: 1088/2847 cut-off events. [2021-11-09 10:45:28,539 INFO L130 PetriNetUnfolder]: For 1359521/1359850 co-relation queries the response was YES. [2021-11-09 10:45:28,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49710 conditions, 2847 events. 1088/2847 cut-off events. For 1359521/1359850 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 17808 event pairs, 12 based on Foata normal form. 23/2687 useless extension candidates. Maximal degree in co-relation 49578. Up to 752 conditions per place. [2021-11-09 10:45:28,767 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 18 selfloop transitions, 155 changer transitions 0/703 dead transitions. [2021-11-09 10:45:28,767 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 703 transitions, 9146 flow [2021-11-09 10:45:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:45:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-11-09 10:45:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2358 transitions. [2021-11-09 10:45:28,772 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8733333333333333 [2021-11-09 10:45:28,772 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2358 transitions. [2021-11-09 10:45:28,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2358 transitions. [2021-11-09 10:45:28,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:28,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2358 transitions. [2021-11-09 10:45:28,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.6) internal successors, (2358), 30 states have internal predecessors, (2358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,786 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 90.0) internal successors, (2790), 31 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:28,786 INFO L186 Difference]: Start difference. First operand has 471 places, 689 transitions, 8650 flow. Second operand 30 states and 2358 transitions. [2021-11-09 10:45:28,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 703 transitions, 9146 flow [2021-11-09 10:45:31,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 703 transitions, 5138 flow, removed 1800 selfloop flow, removed 54 redundant places. [2021-11-09 10:45:31,643 INFO L242 Difference]: Finished difference. Result has 449 places, 692 transitions, 5072 flow [2021-11-09 10:45:31,644 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4642, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5072, PETRI_PLACES=449, PETRI_TRANSITIONS=692} [2021-11-09 10:45:31,644 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 361 predicate places. [2021-11-09 10:45:31,645 INFO L470 AbstractCegarLoop]: Abstraction has has 449 places, 692 transitions, 5072 flow [2021-11-09 10:45:31,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:31,645 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:31,646 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:31,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:31,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-09 10:45:31,871 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -366798908, now seen corresponding path program 2 times [2021-11-09 10:45:31,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:31,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576287664] [2021-11-09 10:45:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:31,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:32,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576287664] [2021-11-09 10:45:32,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576287664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:32,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241290370] [2021-11-09 10:45:32,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:45:32,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:32,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:32,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:45:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:45:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:32,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 10:45:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:33,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241290370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:33,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:33,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-11-09 10:45:33,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610500384] [2021-11-09 10:45:33,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:45:33,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:33,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:45:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:45:33,024 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:33,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 692 transitions, 5072 flow. Second operand has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:33,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:33,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:33,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:34,833 INFO L129 PetriNetUnfolder]: 1167/3083 cut-off events. [2021-11-09 10:45:34,833 INFO L130 PetriNetUnfolder]: For 1468851/1469300 co-relation queries the response was YES. [2021-11-09 10:45:35,026 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50830 conditions, 3083 events. 1167/3083 cut-off events. For 1468851/1469300 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 19336 event pairs, 23 based on Foata normal form. 21/2886 useless extension candidates. Maximal degree in co-relation 50694. Up to 693 conditions per place. [2021-11-09 10:45:35,146 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 19 selfloop transitions, 158 changer transitions 0/707 dead transitions. [2021-11-09 10:45:35,146 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 707 transitions, 5586 flow [2021-11-09 10:45:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:45:35,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-11-09 10:45:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2593 transitions. [2021-11-09 10:45:35,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8730639730639731 [2021-11-09 10:45:35,151 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2593 transitions. [2021-11-09 10:45:35,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2593 transitions. [2021-11-09 10:45:35,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:35,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2593 transitions. [2021-11-09 10:45:35,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.57575757575758) internal successors, (2593), 33 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,168 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 90.0) internal successors, (3060), 34 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:35,168 INFO L186 Difference]: Start difference. First operand has 449 places, 692 transitions, 5072 flow. Second operand 33 states and 2593 transitions. [2021-11-09 10:45:35,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 707 transitions, 5586 flow [2021-11-09 10:45:39,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 707 transitions, 5216 flow, removed 40 selfloop flow, removed 25 redundant places. [2021-11-09 10:45:39,130 INFO L242 Difference]: Finished difference. Result has 459 places, 695 transitions, 5136 flow [2021-11-09 10:45:39,132 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4702, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5136, PETRI_PLACES=459, PETRI_TRANSITIONS=695} [2021-11-09 10:45:39,132 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 371 predicate places. [2021-11-09 10:45:39,132 INFO L470 AbstractCegarLoop]: Abstraction has has 459 places, 695 transitions, 5136 flow [2021-11-09 10:45:39,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 78.92) internal successors, (1973), 25 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:39,133 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:39,134 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:39,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:39,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 10:45:39,359 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash 522062889, now seen corresponding path program 3 times [2021-11-09 10:45:39,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:39,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429434505] [2021-11-09 10:45:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:39,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:39,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429434505] [2021-11-09 10:45:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429434505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752884207] [2021-11-09 10:45:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:45:39,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:39,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:39,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:45:40,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 10:45:40,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:40,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 10:45:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:40,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752884207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:40,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:40,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-11-09 10:45:40,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410710563] [2021-11-09 10:45:40,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 10:45:40,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:40,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 10:45:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:45:40,820 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:45:40,823 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 695 transitions, 5136 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:40,823 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:40,824 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:45:40,824 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:45:42,494 INFO L129 PetriNetUnfolder]: 1235/3143 cut-off events. [2021-11-09 10:45:42,494 INFO L130 PetriNetUnfolder]: For 1585288/1585819 co-relation queries the response was YES. [2021-11-09 10:45:42,606 INFO L84 FinitePrefix]: Finished finitePrefix Result has 54782 conditions, 3143 events. 1235/3143 cut-off events. For 1585288/1585819 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19112 event pairs, 31 based on Foata normal form. 21/2936 useless extension candidates. Maximal degree in co-relation 54643. Up to 750 conditions per place. [2021-11-09 10:45:42,731 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 20 selfloop transitions, 161 changer transitions 0/711 dead transitions. [2021-11-09 10:45:42,731 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 711 transitions, 5668 flow [2021-11-09 10:45:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 10:45:42,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-11-09 10:45:42,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2828 transitions. [2021-11-09 10:45:42,737 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8728395061728395 [2021-11-09 10:45:42,738 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2828 transitions. [2021-11-09 10:45:42,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2828 transitions. [2021-11-09 10:45:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:45:42,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2828 transitions. [2021-11-09 10:45:42,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.55555555555556) internal successors, (2828), 36 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,753 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 90.0) internal successors, (3330), 37 states have internal predecessors, (3330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:42,753 INFO L186 Difference]: Start difference. First operand has 459 places, 695 transitions, 5136 flow. Second operand 36 states and 2828 transitions. [2021-11-09 10:45:42,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 711 transitions, 5668 flow [2021-11-09 10:45:47,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 711 transitions, 5272 flow, removed 43 selfloop flow, removed 29 redundant places. [2021-11-09 10:45:47,520 INFO L242 Difference]: Finished difference. Result has 468 places, 698 transitions, 5186 flow [2021-11-09 10:45:47,521 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=5186, PETRI_PLACES=468, PETRI_TRANSITIONS=698} [2021-11-09 10:45:47,522 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 380 predicate places. [2021-11-09 10:45:47,522 INFO L470 AbstractCegarLoop]: Abstraction has has 468 places, 698 transitions, 5186 flow [2021-11-09 10:45:47,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:47,522 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:45:47,523 INFO L254 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:45:47,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:45:47,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:47,734 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:45:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:45:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1609652580, now seen corresponding path program 4 times [2021-11-09 10:45:47,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:45:47,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87244970] [2021-11-09 10:45:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:45:47,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:45:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:45:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:48,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:45:48,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87244970] [2021-11-09 10:45:48,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87244970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:48,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654915843] [2021-11-09 10:45:48,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:45:48,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:45:48,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:45:48,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:45:48,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:45:48,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:45:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:45:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 10:45:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:45:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 335 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:45:51,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654915843] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:45:51,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:45:51,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 43] total 68 [2021-11-09 10:45:51,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446992890] [2021-11-09 10:45:51,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-09 10:45:51,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:45:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-09 10:45:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=472, Invalid=4084, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 10:45:51,617 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 90 [2021-11-09 10:45:51,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 698 transitions, 5186 flow. Second operand has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:45:51,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:45:51,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 90 [2021-11-09 10:45:51,622 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:46:02,101 INFO L129 PetriNetUnfolder]: 2883/5915 cut-off events. [2021-11-09 10:46:02,101 INFO L130 PetriNetUnfolder]: For 3622519/3623964 co-relation queries the response was YES. [2021-11-09 10:46:02,177 INFO L84 FinitePrefix]: Finished finitePrefix Result has 116319 conditions, 5915 events. 2883/5915 cut-off events. For 3622519/3623964 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 36225 event pairs, 35 based on Foata normal form. 318/5913 useless extension candidates. Maximal degree in co-relation 116177. Up to 1478 conditions per place. [2021-11-09 10:46:02,299 INFO L132 encePairwiseOnDemand]: 71/90 looper letters, 974 selfloop transitions, 555 changer transitions 0/1576 dead transitions. [2021-11-09 10:46:02,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1576 transitions, 47809 flow [2021-11-09 10:46:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-11-09 10:46:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-11-09 10:46:02,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 11750 transitions. [2021-11-09 10:46:02,322 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.6695156695156695 [2021-11-09 10:46:02,323 INFO L72 ComplementDD]: Start complementDD. Operand 195 states and 11750 transitions. [2021-11-09 10:46:02,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 195 states and 11750 transitions. [2021-11-09 10:46:02,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:46:02,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 195 states and 11750 transitions. [2021-11-09 10:46:02,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 196 states, 195 states have (on average 60.256410256410255) internal successors, (11750), 195 states have internal predecessors, (11750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:02,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:02,385 INFO L81 ComplementDD]: Finished complementDD. Result has 196 states, 196 states have (on average 90.0) internal successors, (17640), 196 states have internal predecessors, (17640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:02,385 INFO L186 Difference]: Start difference. First operand has 468 places, 698 transitions, 5186 flow. Second operand 195 states and 11750 transitions. [2021-11-09 10:46:02,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1576 transitions, 47809 flow [2021-11-09 10:46:08,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1576 transitions, 46939 flow, removed 184 selfloop flow, removed 32 redundant places. [2021-11-09 10:46:08,827 INFO L242 Difference]: Finished difference. Result has 735 places, 1118 transitions, 22687 flow [2021-11-09 10:46:08,828 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=195, PETRI_FLOW=22687, PETRI_PLACES=735, PETRI_TRANSITIONS=1118} [2021-11-09 10:46:08,828 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 647 predicate places. [2021-11-09 10:46:08,828 INFO L470 AbstractCegarLoop]: Abstraction has has 735 places, 1118 transitions, 22687 flow [2021-11-09 10:46:08,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 59.029411764705884) internal successors, (4014), 68 states have internal predecessors, (4014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:08,829 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:46:08,829 INFO L254 CegarLoopForPetriNet]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:09,029 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:46:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -254102967, now seen corresponding path program 5 times [2021-11-09 10:46:09,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63868050] [2021-11-09 10:46:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:09,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:09,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63868050] [2021-11-09 10:46:09,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63868050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:09,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201190920] [2021-11-09 10:46:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:46:09,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:09,387 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:09,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:46:09,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-09 10:46:09,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:09,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 10:46:09,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 0 proven. 559 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:10,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201190920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:10,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:10,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-11-09 10:46:10,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464419865] [2021-11-09 10:46:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:46:10,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:46:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-11-09 10:46:10,351 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:46:10,352 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 1118 transitions, 22687 flow. Second operand has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:10,352 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:46:10,352 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:46:10,352 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:46:14,914 INFO L129 PetriNetUnfolder]: 1888/4851 cut-off events. [2021-11-09 10:46:14,914 INFO L130 PetriNetUnfolder]: For 9193484/9194975 co-relation queries the response was YES. [2021-11-09 10:46:15,304 INFO L84 FinitePrefix]: Finished finitePrefix Result has 158458 conditions, 4851 events. 1888/4851 cut-off events. For 9193484/9194975 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 32450 event pairs, 56 based on Foata normal form. 25/4489 useless extension candidates. Maximal degree in co-relation 158211. Up to 1252 conditions per place. [2021-11-09 10:46:15,546 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 22 selfloop transitions, 278 changer transitions 0/1136 dead transitions. [2021-11-09 10:46:15,546 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 1136 transitions, 23501 flow [2021-11-09 10:46:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 10:46:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-11-09 10:46:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3298 transitions. [2021-11-09 10:46:15,551 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8724867724867725 [2021-11-09 10:46:15,551 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3298 transitions. [2021-11-09 10:46:15,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3298 transitions. [2021-11-09 10:46:15,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:46:15,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3298 transitions. [2021-11-09 10:46:15,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 78.52380952380952) internal successors, (3298), 42 states have internal predecessors, (3298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:15,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:15,564 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 90.0) internal successors, (3870), 43 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:15,564 INFO L186 Difference]: Start difference. First operand has 735 places, 1118 transitions, 22687 flow. Second operand 42 states and 3298 transitions. [2021-11-09 10:46:15,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 1136 transitions, 23501 flow [2021-11-09 10:46:58,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 1136 transitions, 9151 flow, removed 7128 selfloop flow, removed 11 redundant places. [2021-11-09 10:46:58,599 INFO L242 Difference]: Finished difference. Result has 768 places, 1121 transitions, 9053 flow [2021-11-09 10:46:58,601 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8337, PETRI_DIFFERENCE_MINUEND_PLACES=724, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=9053, PETRI_PLACES=768, PETRI_TRANSITIONS=1121} [2021-11-09 10:46:58,601 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 680 predicate places. [2021-11-09 10:46:58,602 INFO L470 AbstractCegarLoop]: Abstraction has has 768 places, 1121 transitions, 9053 flow [2021-11-09 10:46:58,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 78.93548387096774) internal successors, (2447), 31 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:46:58,603 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:46:58,603 INFO L254 CegarLoopForPetriNet]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:58,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:58,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 10:46:58,821 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:46:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash 337783618, now seen corresponding path program 6 times [2021-11-09 10:46:58,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:58,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229143638] [2021-11-09 10:46:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:58,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:59,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:59,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229143638] [2021-11-09 10:46:59,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229143638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:59,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478958133] [2021-11-09 10:46:59,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 10:46:59,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:59,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:59,244 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:59,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:46:59,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 10:46:59,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:46:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 10:46:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:00,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478958133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:00,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:00,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 33 [2021-11-09 10:47:00,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431838173] [2021-11-09 10:47:00,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 10:47:00,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:00,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 10:47:00,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 10:47:00,395 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:47:00,397 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1121 transitions, 9053 flow. Second operand has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:00,398 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:47:00,398 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:47:00,398 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:47:04,814 INFO L129 PetriNetUnfolder]: 1975/4877 cut-off events. [2021-11-09 10:47:04,814 INFO L130 PetriNetUnfolder]: For 9332136/9333284 co-relation queries the response was YES. [2021-11-09 10:47:05,105 INFO L84 FinitePrefix]: Finished finitePrefix Result has 159480 conditions, 4877 events. 1975/4877 cut-off events. For 9332136/9333284 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 31634 event pairs, 69 based on Foata normal form. 25/4507 useless extension candidates. Maximal degree in co-relation 159229. Up to 1230 conditions per place. [2021-11-09 10:47:05,577 INFO L132 encePairwiseOnDemand]: 85/90 looper letters, 23 selfloop transitions, 281 changer transitions 0/1140 dead transitions. [2021-11-09 10:47:05,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 1140 transitions, 9885 flow [2021-11-09 10:47:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:47:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-11-09 10:47:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3533 transitions. [2021-11-09 10:47:05,582 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8723456790123457 [2021-11-09 10:47:05,582 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3533 transitions. [2021-11-09 10:47:05,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3533 transitions. [2021-11-09 10:47:05,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:47:05,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3533 transitions. [2021-11-09 10:47:05,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 78.5111111111111) internal successors, (3533), 45 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:05,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:05,595 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 90.0) internal successors, (4140), 46 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:05,595 INFO L186 Difference]: Start difference. First operand has 768 places, 1121 transitions, 9053 flow. Second operand 45 states and 3533 transitions. [2021-11-09 10:47:05,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 1140 transitions, 9885 flow [2021-11-09 10:47:51,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 1140 transitions, 9230 flow, removed 58 selfloop flow, removed 37 redundant places. [2021-11-09 10:47:51,138 INFO L242 Difference]: Finished difference. Result has 778 places, 1124 transitions, 9120 flow [2021-11-09 10:47:51,140 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=9120, PETRI_PLACES=778, PETRI_TRANSITIONS=1124} [2021-11-09 10:47:51,140 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 690 predicate places. [2021-11-09 10:47:51,141 INFO L470 AbstractCegarLoop]: Abstraction has has 778 places, 1124 transitions, 9120 flow [2021-11-09 10:47:51,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.93939393939394) internal successors, (2605), 33 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:51,142 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:47:51,142 INFO L254 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:51,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:51,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 10:47:51,355 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:47:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:51,356 INFO L85 PathProgramCache]: Analyzing trace with hash -377637117, now seen corresponding path program 7 times [2021-11-09 10:47:51,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:51,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15574417] [2021-11-09 10:47:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:51,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:51,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:51,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15574417] [2021-11-09 10:47:51,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15574417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:51,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853830235] [2021-11-09 10:47:51,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 10:47:51,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:51,880 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:51,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:47:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 10:47:52,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853830235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:53,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:53,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-11-09 10:47:53,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518067599] [2021-11-09 10:47:53,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:53,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:53,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:47:53,307 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 90 [2021-11-09 10:47:53,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1124 transitions, 9120 flow. Second operand has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:53,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:47:53,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 90 [2021-11-09 10:47:53,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:47:58,985 INFO L129 PetriNetUnfolder]: 2022/5081 cut-off events. [2021-11-09 10:47:58,986 INFO L130 PetriNetUnfolder]: For 9842226/9843750 co-relation queries the response was YES. [2021-11-09 10:47:59,331 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166120 conditions, 5081 events. 2022/5081 cut-off events. For 9842226/9843750 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 33374 event pairs, 79 based on Foata normal form. 25/4668 useless extension candidates. Maximal degree in co-relation 165866. Up to 1277 conditions per place. [2021-11-09 10:47:59,767 INFO L132 encePairwiseOnDemand]: 84/90 looper letters, 21 selfloop transitions, 285 changer transitions 0/1142 dead transitions. [2021-11-09 10:47:59,768 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1142 transitions, 9864 flow [2021-11-09 10:47:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:47:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-11-09 10:47:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3766 transitions. [2021-11-09 10:47:59,774 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8717592592592592 [2021-11-09 10:47:59,775 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3766 transitions. [2021-11-09 10:47:59,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3766 transitions. [2021-11-09 10:47:59,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 10:47:59,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3766 transitions. [2021-11-09 10:47:59,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 78.45833333333333) internal successors, (3766), 48 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,790 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 90.0) internal successors, (4410), 49 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:47:59,790 INFO L186 Difference]: Start difference. First operand has 778 places, 1124 transitions, 9120 flow. Second operand 48 states and 3766 transitions. [2021-11-09 10:47:59,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1142 transitions, 9864 flow [2021-11-09 10:49:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 1142 transitions, 9186 flow, removed 61 selfloop flow, removed 41 redundant places. [2021-11-09 10:49:00,672 INFO L242 Difference]: Finished difference. Result has 788 places, 1127 transitions, 9132 flow [2021-11-09 10:49:00,674 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=8442, PETRI_DIFFERENCE_MINUEND_PLACES=737, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=9132, PETRI_PLACES=788, PETRI_TRANSITIONS=1127} [2021-11-09 10:49:00,675 INFO L334 CegarLoopForPetriNet]: 88 programPoint places, 700 predicate places. [2021-11-09 10:49:00,675 INFO L470 AbstractCegarLoop]: Abstraction has has 788 places, 1127 transitions, 9132 flow [2021-11-09 10:49:00,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 78.94285714285714) internal successors, (2763), 35 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:00,676 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-11-09 10:49:00,676 INFO L254 CegarLoopForPetriNet]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:00,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:00,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 10:49:00,884 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-11-09 10:49:00,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:00,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1909233674, now seen corresponding path program 8 times [2021-11-09 10:49:00,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:00,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813087914] [2021-11-09 10:49:00,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:00,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 0 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:03,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:03,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813087914] [2021-11-09 10:49:03,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813087914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:03,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845494452] [2021-11-09 10:49:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:49:03,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:03,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:03,292 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:03,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ebce6ef-03bc-461f-b437-1564cf49e7ca/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:49:04,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:49:04,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:49:04,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:49:04,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 856 backedges. 637 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:09,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845494452] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:09,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:09,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 108 [2021-11-09 10:49:09,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762380540] [2021-11-09 10:49:09,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-09 10:49:09,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-09 10:49:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=10979, Unknown=0, NotChecked=0, Total=11556 [2021-11-09 10:49:09,742 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 90 [2021-11-09 10:49:09,747 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1127 transitions, 9132 flow. Second operand has 108 states, 108 states have (on average 65.16666666666667) internal successors, (7038), 108 states have internal predecessors, (7038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 10:49:09,747 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-11-09 10:49:09,747 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 90 [2021-11-09 10:49:09,747 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-11-09 10:50:47,699 INFO L129 PetriNetUnfolder]: 10347/31294 cut-off events. [2021-11-09 10:50:47,699 INFO L130 PetriNetUnfolder]: For 61511823/61526895 co-relation queries the response was YES.