./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a --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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 09:05:21,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 09:05:21,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 09:05:21,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 09:05:21,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 09:05:21,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 09:05:21,204 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 09:05:21,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 09:05:21,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 09:05:21,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 09:05:21,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 09:05:21,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 09:05:21,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 09:05:21,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 09:05:21,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 09:05:21,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 09:05:21,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 09:05:21,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 09:05:21,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 09:05:21,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 09:05:21,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 09:05:21,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 09:05:21,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 09:05:21,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 09:05:21,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 09:05:21,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 09:05:21,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 09:05:21,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 09:05:21,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 09:05:21,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 09:05:21,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 09:05:21,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 09:05:21,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 09:05:21,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 09:05:21,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 09:05:21,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 09:05:21,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 09:05:21,245 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 09:05:21,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 09:05:21,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 09:05:21,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 09:05:21,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 09:05:21,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 09:05:21,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 09:05:21,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 09:05:21,284 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 09:05:21,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 09:05:21,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 09:05:21,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 09:05:21,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 09:05:21,286 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 09:05:21,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 09:05:21,287 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 09:05:21,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 09:05:21,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 09:05:21,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 09:05:21,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 09:05:21,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 09:05:21,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 09:05:21,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 09:05:21,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 09:05:21,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:05:21,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 09:05:21,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 09:05:21,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 09:05:21,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 09:05:21,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 09:05:21,297 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 09:05:21,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 09:05:21,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 09:05:21,298 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_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-11-21 09:05:21,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 09:05:21,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 09:05:21,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 09:05:21,593 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 09:05:21,594 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 09:05:21,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-21 09:05:24,525 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 09:05:24,766 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 09:05:24,766 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-21 09:05:24,773 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/data/fb551c8f7/f3bad3f2b4a0452d833e215bf8ef651d/FLAGe9b74578e [2022-11-21 09:05:24,786 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/data/fb551c8f7/f3bad3f2b4a0452d833e215bf8ef651d [2022-11-21 09:05:24,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 09:05:24,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 09:05:24,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 09:05:24,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 09:05:24,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 09:05:24,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:24" (1/1) ... [2022-11-21 09:05:24,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52726fc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:24, skipping insertion in model container [2022-11-21 09:05:24,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:05:24" (1/1) ... [2022-11-21 09:05:24,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 09:05:24,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 09:05:24,978 WARN L237 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_610801ff-247b-479d-a456-1b395fb9ebeb/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-21 09:05:24,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:05:24,992 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 09:05:25,011 WARN L237 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_610801ff-247b-479d-a456-1b395fb9ebeb/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-21 09:05:25,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 09:05:25,026 INFO L208 MainTranslator]: Completed translation [2022-11-21 09:05:25,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25 WrapperNode [2022-11-21 09:05:25,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 09:05:25,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 09:05:25,028 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 09:05:25,028 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 09:05:25,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,059 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-21 09:05:25,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 09:05:25,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 09:05:25,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 09:05:25,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 09:05:25,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 09:05:25,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 09:05:25,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 09:05:25,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 09:05:25,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (1/1) ... [2022-11-21 09:05:25,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 09:05:25,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:25,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 09:05:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 09:05:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 09:05:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 09:05:25,174 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 09:05:25,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 09:05:25,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 09:05:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 09:05:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 09:05:25,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 09:05:25,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 09:05:25,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 09:05:25,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 09:05:25,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 09:05:25,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 09:05:25,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 09:05:25,178 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 09:05:25,271 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 09:05:25,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 09:05:25,450 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 09:05:25,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 09:05:25,456 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 09:05:25,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:25 BoogieIcfgContainer [2022-11-21 09:05:25,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 09:05:25,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 09:05:25,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 09:05:25,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 09:05:25,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:05:24" (1/3) ... [2022-11-21 09:05:25,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3421b957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:25, skipping insertion in model container [2022-11-21 09:05:25,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:05:25" (2/3) ... [2022-11-21 09:05:25,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3421b957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:05:25, skipping insertion in model container [2022-11-21 09:05:25,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:05:25" (3/3) ... [2022-11-21 09:05:25,468 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-11-21 09:05:25,477 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 09:05:25,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 09:05:25,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 09:05:25,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 09:05:25,558 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 09:05:25,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-21 09:05:25,720 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-21 09:05:25,720 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:05:25,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-21 09:05:25,728 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-21 09:05:25,735 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-21 09:05:25,760 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 09:05:25,770 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f9f9611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 09:05:25,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 09:05:25,819 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-21 09:05:25,819 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 09:05:25,820 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:25,821 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:25,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:25,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2022-11-21 09:05:25,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:25,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008093269] [2022-11-21 09:05:25,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:25,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:26,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:26,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008093269] [2022-11-21 09:05:26,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008093269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:26,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:26,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 09:05:26,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851627873] [2022-11-21 09:05:26,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:26,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 09:05:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 09:05:26,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 09:05:26,250 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2022-11-21 09:05:26,252 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:26,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2022-11-21 09:05:26,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:26,286 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-21 09:05:26,286 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-21 09:05:26,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-21 09:05:26,288 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-21 09:05:26,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2022-11-21 09:05:26,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 09:05:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 09:05:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2022-11-21 09:05:26,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-11-21 09:05:26,302 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2022-11-21 09:05:26,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2022-11-21 09:05:26,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:26,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2022-11-21 09:05:26,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,313 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,315 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2022-11-21 09:05:26,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2022-11-21 09:05:26,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-21 09:05:26,321 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-21 09:05:26,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-21 09:05:26,329 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-21 09:05:26,329 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-21 09:05:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:26,330 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:26,330 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:26,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 09:05:26,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2022-11-21 09:05:26,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955789861] [2022-11-21 09:05:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:26,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:27,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:27,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955789861] [2022-11-21 09:05:27,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955789861] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:27,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:27,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:27,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41165202] [2022-11-21 09:05:27,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:27,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:27,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:27,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:27,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:27,376 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:27,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:27,916 INFO L130 PetriNetUnfolder]: 106/357 cut-off events. [2022-11-21 09:05:27,916 INFO L131 PetriNetUnfolder]: For 22/28 co-relation queries the response was YES. [2022-11-21 09:05:27,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 357 events. 106/357 cut-off events. For 22/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1669 event pairs, 21 based on Foata normal form. 3/325 useless extension candidates. Maximal degree in co-relation 598. Up to 57 conditions per place. [2022-11-21 09:05:27,925 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2022-11-21 09:05:27,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2022-11-21 09:05:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:27,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-11-21 09:05:27,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-11-21 09:05:27,936 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-11-21 09:05:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-11-21 09:05:27,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:27,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-11-21 09:05:27,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,950 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,950 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2022-11-21 09:05:27,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2022-11-21 09:05:27,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 09:05:27,957 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2022-11-21 09:05:27,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-11-21 09:05:27,960 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-11-21 09:05:27,960 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2022-11-21 09:05:27,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:27,961 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:27,962 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:27,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 09:05:27,962 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:27,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:27,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1980240921, now seen corresponding path program 2 times [2022-11-21 09:05:27,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:27,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804705720] [2022-11-21 09:05:27,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:28,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804705720] [2022-11-21 09:05:28,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804705720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:28,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:28,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:28,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574221868] [2022-11-21 09:05:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:28,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:28,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:28,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:28,444 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:28,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:28,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:28,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:28,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:28,911 INFO L130 PetriNetUnfolder]: 111/370 cut-off events. [2022-11-21 09:05:28,912 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-11-21 09:05:28,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 370 events. 111/370 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1727 event pairs, 31 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 812. Up to 98 conditions per place. [2022-11-21 09:05:28,915 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 54 selfloop transitions, 18 changer transitions 8/121 dead transitions. [2022-11-21 09:05:28,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 121 transitions, 526 flow [2022-11-21 09:05:28,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-21 09:05:28,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-21 09:05:28,919 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-21 09:05:28,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-21 09:05:28,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:28,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-21 09:05:28,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:28,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:28,925 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:28,925 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 792 transitions. [2022-11-21 09:05:28,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 121 transitions, 526 flow [2022-11-21 09:05:28,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 510 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-21 09:05:28,931 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 309 flow [2022-11-21 09:05:28,931 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2022-11-21 09:05:28,932 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-11-21 09:05:28,932 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 309 flow [2022-11-21 09:05:28,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:28,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:28,933 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:28,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 09:05:28,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:28,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:28,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1386736289, now seen corresponding path program 3 times [2022-11-21 09:05:28,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:28,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283298428] [2022-11-21 09:05:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:28,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:29,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283298428] [2022-11-21 09:05:29,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283298428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:29,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:29,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:29,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302694720] [2022-11-21 09:05:29,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:29,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:29,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:29,315 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:29,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 309 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:29,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:29,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:29,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:29,815 INFO L130 PetriNetUnfolder]: 139/385 cut-off events. [2022-11-21 09:05:29,816 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-11-21 09:05:29,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 385 events. 139/385 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1755 event pairs, 35 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1057. Up to 107 conditions per place. [2022-11-21 09:05:29,820 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 28 changer transitions 8/130 dead transitions. [2022-11-21 09:05:29,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 684 flow [2022-11-21 09:05:29,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:29,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-21 09:05:29,823 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-21 09:05:29,823 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-21 09:05:29,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-21 09:05:29,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:29,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-21 09:05:29,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:29,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:29,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:29,829 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 309 flow. Second operand 14 states and 794 transitions. [2022-11-21 09:05:29,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 684 flow [2022-11-21 09:05:29,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 614 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:29,835 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 427 flow [2022-11-21 09:05:29,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-11-21 09:05:29,837 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-11-21 09:05:29,837 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 427 flow [2022-11-21 09:05:29,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:29,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:29,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:29,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 09:05:29,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -83195579, now seen corresponding path program 4 times [2022-11-21 09:05:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:29,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161723456] [2022-11-21 09:05:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:29,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:30,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:30,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161723456] [2022-11-21 09:05:30,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161723456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:30,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:30,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:30,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508473682] [2022-11-21 09:05:30,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:30,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:30,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:30,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:30,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:30,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:30,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:30,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:30,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:30,588 INFO L130 PetriNetUnfolder]: 162/417 cut-off events. [2022-11-21 09:05:30,588 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-11-21 09:05:30,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 417 events. 162/417 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1873 event pairs, 46 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1322. Up to 121 conditions per place. [2022-11-21 09:05:30,592 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 38 changer transitions 8/148 dead transitions. [2022-11-21 09:05:30,593 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 919 flow [2022-11-21 09:05:30,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:30,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-21 09:05:30,596 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-21 09:05:30,596 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-21 09:05:30,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-21 09:05:30,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:30,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-21 09:05:30,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:30,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:30,604 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:30,604 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 427 flow. Second operand 14 states and 790 transitions. [2022-11-21 09:05:30,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 919 flow [2022-11-21 09:05:30,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 842 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-11-21 09:05:30,613 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 631 flow [2022-11-21 09:05:30,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=631, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-11-21 09:05:30,616 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-11-21 09:05:30,616 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 631 flow [2022-11-21 09:05:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:30,617 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:30,617 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:30,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 09:05:30,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash 89243755, now seen corresponding path program 5 times [2022-11-21 09:05:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:30,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808025213] [2022-11-21 09:05:30,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:30,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:31,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:31,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808025213] [2022-11-21 09:05:31,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808025213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:31,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:31,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899142231] [2022-11-21 09:05:31,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:31,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:31,019 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:31,020 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:31,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:31,369 INFO L130 PetriNetUnfolder]: 160/416 cut-off events. [2022-11-21 09:05:31,369 INFO L131 PetriNetUnfolder]: For 854/854 co-relation queries the response was YES. [2022-11-21 09:05:31,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 416 events. 160/416 cut-off events. For 854/854 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 44 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1458. Up to 120 conditions per place. [2022-11-21 09:05:31,375 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 36 changer transitions 8/149 dead transitions. [2022-11-21 09:05:31,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 149 transitions, 1018 flow [2022-11-21 09:05:31,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:31,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-21 09:05:31,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-21 09:05:31,379 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-21 09:05:31,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-21 09:05:31,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:31,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-21 09:05:31,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,386 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,386 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 631 flow. Second operand 14 states and 790 transitions. [2022-11-21 09:05:31,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 149 transitions, 1018 flow [2022-11-21 09:05:31,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 952 flow, removed 19 selfloop flow, removed 8 redundant places. [2022-11-21 09:05:31,397 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 642 flow [2022-11-21 09:05:31,397 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=642, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2022-11-21 09:05:31,398 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-11-21 09:05:31,398 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 642 flow [2022-11-21 09:05:31,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:31,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 09:05:31,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:31,400 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 6 times [2022-11-21 09:05:31,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:31,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572713895] [2022-11-21 09:05:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:31,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572713895] [2022-11-21 09:05:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572713895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:31,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:31,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-21 09:05:31,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653774705] [2022-11-21 09:05:31,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:31,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 09:05:31,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 09:05:31,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-21 09:05:31,774 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:31,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 642 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:31,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:31,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:31,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:32,232 INFO L130 PetriNetUnfolder]: 176/440 cut-off events. [2022-11-21 09:05:32,232 INFO L131 PetriNetUnfolder]: For 1154/1154 co-relation queries the response was YES. [2022-11-21 09:05:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 440 events. 176/440 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1990 event pairs, 45 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1594. Up to 125 conditions per place. [2022-11-21 09:05:32,237 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 42 changer transitions 7/151 dead transitions. [2022-11-21 09:05:32,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 1099 flow [2022-11-21 09:05:32,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-21 09:05:32,241 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-21 09:05:32,241 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-21 09:05:32,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-21 09:05:32,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:32,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-21 09:05:32,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,247 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,247 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 642 flow. Second operand 14 states and 793 transitions. [2022-11-21 09:05:32,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 1099 flow [2022-11-21 09:05:32,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 989 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:32,257 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 787 flow [2022-11-21 09:05:32,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=787, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2022-11-21 09:05:32,258 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 44 predicate places. [2022-11-21 09:05:32,258 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 787 flow [2022-11-21 09:05:32,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,259 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:32,259 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:32,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 09:05:32,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:32,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1247761689, now seen corresponding path program 7 times [2022-11-21 09:05:32,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:32,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262858537] [2022-11-21 09:05:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:32,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:32,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262858537] [2022-11-21 09:05:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262858537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:32,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:32,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941682126] [2022-11-21 09:05:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:32,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:32,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:32,600 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:32,601 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 787 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:32,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:32,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:32,973 INFO L130 PetriNetUnfolder]: 185/508 cut-off events. [2022-11-21 09:05:32,973 INFO L131 PetriNetUnfolder]: For 1502/1504 co-relation queries the response was YES. [2022-11-21 09:05:32,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 508 events. 185/508 cut-off events. For 1502/1504 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2521 event pairs, 37 based on Foata normal form. 3/506 useless extension candidates. Maximal degree in co-relation 1803. Up to 132 conditions per place. [2022-11-21 09:05:32,979 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 44 changer transitions 8/163 dead transitions. [2022-11-21 09:05:32,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 163 transitions, 1245 flow [2022-11-21 09:05:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-21 09:05:32,982 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-21 09:05:32,983 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-21 09:05:32,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-21 09:05:32,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:32,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-21 09:05:32,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,990 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:32,991 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 787 flow. Second operand 14 states and 794 transitions. [2022-11-21 09:05:32,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 163 transitions, 1245 flow [2022-11-21 09:05:32,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1169 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-11-21 09:05:33,001 INFO L231 Difference]: Finished difference. Result has 126 places, 122 transitions, 833 flow [2022-11-21 09:05:33,001 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=833, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2022-11-21 09:05:33,003 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-11-21 09:05:33,004 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 833 flow [2022-11-21 09:05:33,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:33,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:33,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 09:05:33,005 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash -801684339, now seen corresponding path program 8 times [2022-11-21 09:05:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:33,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322274324] [2022-11-21 09:05:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:33,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:33,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:33,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322274324] [2022-11-21 09:05:33,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322274324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:33,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:33,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:33,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785325780] [2022-11-21 09:05:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:33,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:33,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:33,359 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:33,360 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 833 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:33,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:33,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:33,792 INFO L130 PetriNetUnfolder]: 183/504 cut-off events. [2022-11-21 09:05:33,792 INFO L131 PetriNetUnfolder]: For 1794/1796 co-relation queries the response was YES. [2022-11-21 09:05:33,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 504 events. 183/504 cut-off events. For 1794/1796 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2478 event pairs, 34 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 1846. Up to 141 conditions per place. [2022-11-21 09:05:33,799 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 44 changer transitions 8/155 dead transitions. [2022-11-21 09:05:33,799 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1223 flow [2022-11-21 09:05:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-11-21 09:05:33,802 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-11-21 09:05:33,802 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-11-21 09:05:33,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-11-21 09:05:33,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:33,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-11-21 09:05:33,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,809 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,809 INFO L175 Difference]: Start difference. First operand has 126 places, 122 transitions, 833 flow. Second operand 14 states and 795 transitions. [2022-11-21 09:05:33,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1223 flow [2022-11-21 09:05:33,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1117 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:33,823 INFO L231 Difference]: Finished difference. Result has 129 places, 124 transitions, 877 flow [2022-11-21 09:05:33,823 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=129, PETRI_TRANSITIONS=124} [2022-11-21 09:05:33,825 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2022-11-21 09:05:33,825 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 124 transitions, 877 flow [2022-11-21 09:05:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:33,826 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:33,826 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 09:05:33,827 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:33,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1028934011, now seen corresponding path program 9 times [2022-11-21 09:05:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:33,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120540592] [2022-11-21 09:05:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:34,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120540592] [2022-11-21 09:05:34,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120540592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:34,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:34,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209646370] [2022-11-21 09:05:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:34,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:34,173 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:34,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:34,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:34,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:34,573 INFO L130 PetriNetUnfolder]: 181/497 cut-off events. [2022-11-21 09:05:34,573 INFO L131 PetriNetUnfolder]: For 1924/1926 co-relation queries the response was YES. [2022-11-21 09:05:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 497 events. 181/497 cut-off events. For 1924/1926 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2426 event pairs, 36 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 1855. Up to 140 conditions per place. [2022-11-21 09:05:34,579 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2022-11-21 09:05:34,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 1217 flow [2022-11-21 09:05:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-21 09:05:34,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-21 09:05:34,582 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-21 09:05:34,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-21 09:05:34,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:34,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-21 09:05:34,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,588 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,588 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 877 flow. Second operand 14 states and 791 transitions. [2022-11-21 09:05:34,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 1217 flow [2022-11-21 09:05:34,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1127 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-21 09:05:34,599 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 858 flow [2022-11-21 09:05:34,600 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-11-21 09:05:34,600 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-21 09:05:34,600 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 858 flow [2022-11-21 09:05:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,601 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:34,601 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 09:05:34,602 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2017390703, now seen corresponding path program 10 times [2022-11-21 09:05:34,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:34,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322991984] [2022-11-21 09:05:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:34,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:34,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322991984] [2022-11-21 09:05:34,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322991984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:34,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:34,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:34,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637189514] [2022-11-21 09:05:34,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:34,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:34,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:34,950 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:34,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:34,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:34,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:34,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:35,379 INFO L130 PetriNetUnfolder]: 177/472 cut-off events. [2022-11-21 09:05:35,379 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2022-11-21 09:05:35,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 472 events. 177/472 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2328 event pairs, 44 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 1802. Up to 130 conditions per place. [2022-11-21 09:05:35,385 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 44 changer transitions 7/156 dead transitions. [2022-11-21 09:05:35,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 1226 flow [2022-11-21 09:05:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-21 09:05:35,387 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-21 09:05:35,387 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-21 09:05:35,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-21 09:05:35,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:35,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-21 09:05:35,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:35,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:35,393 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:35,393 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 858 flow. Second operand 14 states and 794 transitions. [2022-11-21 09:05:35,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 1226 flow [2022-11-21 09:05:35,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1126 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:35,404 INFO L231 Difference]: Finished difference. Result has 132 places, 124 transitions, 880 flow [2022-11-21 09:05:35,404 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=880, PETRI_PLACES=132, PETRI_TRANSITIONS=124} [2022-11-21 09:05:35,405 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-21 09:05:35,405 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 124 transitions, 880 flow [2022-11-21 09:05:35,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:35,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:35,406 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:35,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 09:05:35,406 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1352752699, now seen corresponding path program 11 times [2022-11-21 09:05:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:35,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19423384] [2022-11-21 09:05:35,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:35,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:35,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19423384] [2022-11-21 09:05:35,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19423384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:35,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:35,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:35,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156733634] [2022-11-21 09:05:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:35,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:35,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:35,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:35,712 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:35,713 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 124 transitions, 880 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:35,713 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:35,713 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:35,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:36,140 INFO L130 PetriNetUnfolder]: 176/470 cut-off events. [2022-11-21 09:05:36,140 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2022-11-21 09:05:36,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 470 events. 176/470 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2306 event pairs, 43 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 1811. Up to 134 conditions per place. [2022-11-21 09:05:36,146 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 40 changer transitions 8/152 dead transitions. [2022-11-21 09:05:36,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 152 transitions, 1216 flow [2022-11-21 09:05:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-21 09:05:36,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-21 09:05:36,149 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-21 09:05:36,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-21 09:05:36,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:36,151 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-21 09:05:36,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,158 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,159 INFO L175 Difference]: Start difference. First operand has 132 places, 124 transitions, 880 flow. Second operand 14 states and 792 transitions. [2022-11-21 09:05:36,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 152 transitions, 1216 flow [2022-11-21 09:05:36,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 152 transitions, 1116 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:36,173 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 839 flow [2022-11-21 09:05:36,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=839, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2022-11-21 09:05:36,175 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-21 09:05:36,175 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 839 flow [2022-11-21 09:05:36,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:36,176 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:36,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 09:05:36,177 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1289263295, now seen corresponding path program 12 times [2022-11-21 09:05:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:36,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951038075] [2022-11-21 09:05:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:36,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951038075] [2022-11-21 09:05:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951038075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:36,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:36,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883627018] [2022-11-21 09:05:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:36,485 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:36,486 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 839 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,486 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:36,486 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:36,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:36,901 INFO L130 PetriNetUnfolder]: 185/531 cut-off events. [2022-11-21 09:05:36,902 INFO L131 PetriNetUnfolder]: For 1972/1974 co-relation queries the response was YES. [2022-11-21 09:05:36,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 531 events. 185/531 cut-off events. For 1972/1974 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2766 event pairs, 33 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1909. Up to 141 conditions per place. [2022-11-21 09:05:36,907 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 41 changer transitions 8/156 dead transitions. [2022-11-21 09:05:36,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 1216 flow [2022-11-21 09:05:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:36,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-21 09:05:36,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-21 09:05:36,910 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-21 09:05:36,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-21 09:05:36,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:36,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-21 09:05:36,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,917 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,917 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 839 flow. Second operand 14 states and 796 transitions. [2022-11-21 09:05:36,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 1216 flow [2022-11-21 09:05:36,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 1122 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:36,928 INFO L231 Difference]: Finished difference. Result has 133 places, 122 transitions, 853 flow [2022-11-21 09:05:36,929 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=853, PETRI_PLACES=133, PETRI_TRANSITIONS=122} [2022-11-21 09:05:36,930 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2022-11-21 09:05:36,930 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 122 transitions, 853 flow [2022-11-21 09:05:36,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:36,930 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:36,931 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:36,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 09:05:36,931 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:36,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2079023765, now seen corresponding path program 13 times [2022-11-21 09:05:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:36,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002196459] [2022-11-21 09:05:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:36,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:37,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002196459] [2022-11-21 09:05:37,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002196459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:37,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:37,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:37,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490152998] [2022-11-21 09:05:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:37,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:37,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:37,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:37,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:37,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 122 transitions, 853 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:37,277 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:37,277 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:37,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:37,707 INFO L130 PetriNetUnfolder]: 178/481 cut-off events. [2022-11-21 09:05:37,708 INFO L131 PetriNetUnfolder]: For 1933/1935 co-relation queries the response was YES. [2022-11-21 09:05:37,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 481 events. 178/481 cut-off events. For 1933/1935 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2388 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1833. Up to 142 conditions per place. [2022-11-21 09:05:37,713 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2022-11-21 09:05:37,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 153 transitions, 1232 flow [2022-11-21 09:05:37,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-21 09:05:37,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-21 09:05:37,716 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-21 09:05:37,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-21 09:05:37,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:37,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-21 09:05:37,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:37,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:37,721 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:37,721 INFO L175 Difference]: Start difference. First operand has 133 places, 122 transitions, 853 flow. Second operand 14 states and 792 transitions. [2022-11-21 09:05:37,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 153 transitions, 1232 flow [2022-11-21 09:05:37,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1130 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:37,732 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 893 flow [2022-11-21 09:05:37,732 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-11-21 09:05:37,732 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-11-21 09:05:37,733 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 893 flow [2022-11-21 09:05:37,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:37,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:37,734 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:37,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 09:05:37,734 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1483632299, now seen corresponding path program 14 times [2022-11-21 09:05:37,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:37,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286874206] [2022-11-21 09:05:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:37,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:38,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286874206] [2022-11-21 09:05:38,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286874206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:38,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:38,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:38,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534342751] [2022-11-21 09:05:38,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:38,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:38,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:38,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:38,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:38,028 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:38,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 893 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:38,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:38,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:38,415 INFO L130 PetriNetUnfolder]: 184/541 cut-off events. [2022-11-21 09:05:38,416 INFO L131 PetriNetUnfolder]: For 2020/2024 co-relation queries the response was YES. [2022-11-21 09:05:38,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 541 events. 184/541 cut-off events. For 2020/2024 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2891 event pairs, 42 based on Foata normal form. 3/535 useless extension candidates. Maximal degree in co-relation 1974. Up to 132 conditions per place. [2022-11-21 09:05:38,422 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2022-11-21 09:05:38,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1328 flow [2022-11-21 09:05:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:38,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-21 09:05:38,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-21 09:05:38,425 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-21 09:05:38,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-21 09:05:38,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:38,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-21 09:05:38,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,429 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,430 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 893 flow. Second operand 14 states and 793 transitions. [2022-11-21 09:05:38,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1328 flow [2022-11-21 09:05:38,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1247 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-21 09:05:38,441 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 941 flow [2022-11-21 09:05:38,441 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=941, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-11-21 09:05:38,442 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2022-11-21 09:05:38,442 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 941 flow [2022-11-21 09:05:38,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:38,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:38,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 09:05:38,443 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:38,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:38,444 INFO L85 PathProgramCache]: Analyzing trace with hash -829072727, now seen corresponding path program 15 times [2022-11-21 09:05:38,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:38,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441742974] [2022-11-21 09:05:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:38,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:38,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441742974] [2022-11-21 09:05:38,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441742974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:38,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:38,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:38,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23303311] [2022-11-21 09:05:38,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:38,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:38,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:38,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:38,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:38,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:38,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:38,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:38,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:39,125 INFO L130 PetriNetUnfolder]: 180/523 cut-off events. [2022-11-21 09:05:39,125 INFO L131 PetriNetUnfolder]: For 2084/2086 co-relation queries the response was YES. [2022-11-21 09:05:39,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 523 events. 180/523 cut-off events. For 2084/2086 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2823 event pairs, 49 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 1968. Up to 152 conditions per place. [2022-11-21 09:05:39,132 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 41 changer transitions 7/162 dead transitions. [2022-11-21 09:05:39,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1368 flow [2022-11-21 09:05:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-21 09:05:39,134 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-21 09:05:39,134 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-21 09:05:39,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-21 09:05:39,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:39,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-21 09:05:39,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,155 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,155 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 941 flow. Second operand 14 states and 792 transitions. [2022-11-21 09:05:39,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1368 flow [2022-11-21 09:05:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1275 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:39,171 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 970 flow [2022-11-21 09:05:39,171 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=970, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2022-11-21 09:05:39,172 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-21 09:05:39,174 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 970 flow [2022-11-21 09:05:39,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,175 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:39,175 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:39,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 09:05:39,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1491831339, now seen corresponding path program 16 times [2022-11-21 09:05:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935485005] [2022-11-21 09:05:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:39,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:39,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935485005] [2022-11-21 09:05:39,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935485005] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:39,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:39,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548929777] [2022-11-21 09:05:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:39,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:39,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:39,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:39,461 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 970 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,461 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:39,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:39,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:39,801 INFO L130 PetriNetUnfolder]: 183/555 cut-off events. [2022-11-21 09:05:39,801 INFO L131 PetriNetUnfolder]: For 2218/2222 co-relation queries the response was YES. [2022-11-21 09:05:39,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 555 events. 183/555 cut-off events. For 2218/2222 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3057 event pairs, 42 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 2052. Up to 164 conditions per place. [2022-11-21 09:05:39,808 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2022-11-21 09:05:39,808 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1359 flow [2022-11-21 09:05:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-11-21 09:05:39,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-11-21 09:05:39,811 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-11-21 09:05:39,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-11-21 09:05:39,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:39,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-11-21 09:05:39,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,817 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,817 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 970 flow. Second operand 14 states and 788 transitions. [2022-11-21 09:05:39,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1359 flow [2022-11-21 09:05:39,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1263 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:39,830 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 925 flow [2022-11-21 09:05:39,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=925, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2022-11-21 09:05:39,832 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-21 09:05:39,833 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 925 flow [2022-11-21 09:05:39,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:39,833 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:39,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:39,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 09:05:39,834 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1006613059, now seen corresponding path program 17 times [2022-11-21 09:05:39,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719983931] [2022-11-21 09:05:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:40,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719983931] [2022-11-21 09:05:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719983931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:40,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:40,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:40,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119628681] [2022-11-21 09:05:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:40,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:40,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:40,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:40,157 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 925 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:40,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:40,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:40,638 INFO L130 PetriNetUnfolder]: 179/519 cut-off events. [2022-11-21 09:05:40,638 INFO L131 PetriNetUnfolder]: For 2138/2140 co-relation queries the response was YES. [2022-11-21 09:05:40,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 519 events. 179/519 cut-off events. For 2138/2140 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2811 event pairs, 45 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1974. Up to 155 conditions per place. [2022-11-21 09:05:40,643 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 9/155 dead transitions. [2022-11-21 09:05:40,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1288 flow [2022-11-21 09:05:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:40,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-21 09:05:40,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-21 09:05:40,647 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-21 09:05:40,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-21 09:05:40,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:40,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-21 09:05:40,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,653 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,653 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 925 flow. Second operand 14 states and 793 transitions. [2022-11-21 09:05:40,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1288 flow [2022-11-21 09:05:40,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1200 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:40,665 INFO L231 Difference]: Finished difference. Result has 144 places, 124 transitions, 899 flow [2022-11-21 09:05:40,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=899, PETRI_PLACES=144, PETRI_TRANSITIONS=124} [2022-11-21 09:05:40,666 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-21 09:05:40,666 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 124 transitions, 899 flow [2022-11-21 09:05:40,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:40,667 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:40,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 09:05:40,667 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1038989917, now seen corresponding path program 18 times [2022-11-21 09:05:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:40,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825746546] [2022-11-21 09:05:40,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:40,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:40,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:40,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825746546] [2022-11-21 09:05:40,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825746546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:40,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:40,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:40,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778797709] [2022-11-21 09:05:40,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:40,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:40,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:40,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:40,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:40,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:40,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 124 transitions, 899 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:40,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:40,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:40,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:41,370 INFO L130 PetriNetUnfolder]: 185/566 cut-off events. [2022-11-21 09:05:41,371 INFO L131 PetriNetUnfolder]: For 2297/2301 co-relation queries the response was YES. [2022-11-21 09:05:41,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 566 events. 185/566 cut-off events. For 2297/2301 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3188 event pairs, 39 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2059. Up to 158 conditions per place. [2022-11-21 09:05:41,377 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 39 changer transitions 8/159 dead transitions. [2022-11-21 09:05:41,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 159 transitions, 1308 flow [2022-11-21 09:05:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-21 09:05:41,380 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-21 09:05:41,380 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-21 09:05:41,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-21 09:05:41,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:41,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-21 09:05:41,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,385 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,385 INFO L175 Difference]: Start difference. First operand has 144 places, 124 transitions, 899 flow. Second operand 14 states and 796 transitions. [2022-11-21 09:05:41,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 159 transitions, 1308 flow [2022-11-21 09:05:41,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 159 transitions, 1216 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:41,398 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 926 flow [2022-11-21 09:05:41,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=926, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2022-11-21 09:05:41,398 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-21 09:05:41,399 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 926 flow [2022-11-21 09:05:41,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,399 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:41,399 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 09:05:41,400 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -978047267, now seen corresponding path program 19 times [2022-11-21 09:05:41,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825603311] [2022-11-21 09:05:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:41,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825603311] [2022-11-21 09:05:41,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825603311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:41,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:41,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:41,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988319620] [2022-11-21 09:05:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:41,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:41,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:41,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:41,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:41,736 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:41,737 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 926 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:41,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:41,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:41,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:42,151 INFO L130 PetriNetUnfolder]: 180/525 cut-off events. [2022-11-21 09:05:42,151 INFO L131 PetriNetUnfolder]: For 2311/2313 co-relation queries the response was YES. [2022-11-21 09:05:42,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 525 events. 180/525 cut-off events. For 2311/2313 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2860 event pairs, 48 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 2008. Up to 162 conditions per place. [2022-11-21 09:05:42,158 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 36 changer transitions 9/154 dead transitions. [2022-11-21 09:05:42,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1284 flow [2022-11-21 09:05:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-21 09:05:42,168 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-21 09:05:42,168 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-21 09:05:42,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-21 09:05:42,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:42,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-21 09:05:42,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,179 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,179 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 926 flow. Second operand 14 states and 791 transitions. [2022-11-21 09:05:42,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1284 flow [2022-11-21 09:05:42,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 1190 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:42,192 INFO L231 Difference]: Finished difference. Result has 144 places, 123 transitions, 879 flow [2022-11-21 09:05:42,192 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=879, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2022-11-21 09:05:42,193 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-21 09:05:42,193 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 879 flow [2022-11-21 09:05:42,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,194 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:42,194 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:42,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 09:05:42,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:42,195 INFO L85 PathProgramCache]: Analyzing trace with hash 840891619, now seen corresponding path program 20 times [2022-11-21 09:05:42,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:42,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215430407] [2022-11-21 09:05:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215430407] [2022-11-21 09:05:42,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215430407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:42,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:42,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-21 09:05:42,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911733173] [2022-11-21 09:05:42,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:42,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 09:05:42,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 09:05:42,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-21 09:05:42,491 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:05:42,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 879 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:42,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:05:42,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:42,930 INFO L130 PetriNetUnfolder]: 180/555 cut-off events. [2022-11-21 09:05:42,930 INFO L131 PetriNetUnfolder]: For 2306/2310 co-relation queries the response was YES. [2022-11-21 09:05:42,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 555 events. 180/555 cut-off events. For 2306/2310 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3078 event pairs, 37 based on Foata normal form. 3/550 useless extension candidates. Maximal degree in co-relation 2028. Up to 162 conditions per place. [2022-11-21 09:05:42,937 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2022-11-21 09:05:42,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1266 flow [2022-11-21 09:05:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-21 09:05:42,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-21 09:05:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-21 09:05:42,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-21 09:05:42,939 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-21 09:05:42,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-21 09:05:42,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:42,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-21 09:05:42,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,944 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,944 INFO L175 Difference]: Start difference. First operand has 144 places, 123 transitions, 879 flow. Second operand 14 states and 793 transitions. [2022-11-21 09:05:42,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1266 flow [2022-11-21 09:05:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1182 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-21 09:05:42,956 INFO L231 Difference]: Finished difference. Result has 145 places, 124 transitions, 897 flow [2022-11-21 09:05:42,956 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=897, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2022-11-21 09:05:42,957 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-11-21 09:05:42,957 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 897 flow [2022-11-21 09:05:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:42,958 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:42,958 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:42,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-21 09:05:42,958 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:42,959 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-11-21 09:05:42,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:42,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541927364] [2022-11-21 09:05:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:42,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541927364] [2022-11-21 09:05:43,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541927364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:43,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571642927] [2022-11-21 09:05:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:43,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:43,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:43,018 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:43,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 09:05:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:05:43,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:43,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:43,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571642927] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:43,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:05:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-21 09:05:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967413928] [2022-11-21 09:05:43,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:43,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:05:43,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:43,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 897 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:43,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:43,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:43,483 INFO L130 PetriNetUnfolder]: 187/539 cut-off events. [2022-11-21 09:05:43,483 INFO L131 PetriNetUnfolder]: For 2686/2688 co-relation queries the response was YES. [2022-11-21 09:05:43,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 539 events. 187/539 cut-off events. For 2686/2688 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2892 event pairs, 14 based on Foata normal form. 8/541 useless extension candidates. Maximal degree in co-relation 2060. Up to 139 conditions per place. [2022-11-21 09:05:43,490 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-11-21 09:05:43,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 176 transitions, 1673 flow [2022-11-21 09:05:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:05:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-21 09:05:43,495 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-21 09:05:43,496 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-21 09:05:43,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-21 09:05:43,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:43,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-21 09:05:43,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,499 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,499 INFO L175 Difference]: Start difference. First operand has 145 places, 124 transitions, 897 flow. Second operand 7 states and 483 transitions. [2022-11-21 09:05:43,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 176 transitions, 1673 flow [2022-11-21 09:05:43,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1544 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-21 09:05:43,513 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1053 flow [2022-11-21 09:05:43,513 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2022-11-21 09:05:43,514 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-11-21 09:05:43,514 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1053 flow [2022-11-21 09:05:43,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,514 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:43,515 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:43,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 09:05:43,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-21 09:05:43,722 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:43,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:43,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1780751315, now seen corresponding path program 2 times [2022-11-21 09:05:43,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011978756] [2022-11-21 09:05:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:43,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:43,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011978756] [2022-11-21 09:05:43,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011978756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:43,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:43,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:43,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898604556] [2022-11-21 09:05:43,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:43,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:43,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:43,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:43,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1053 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:43,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:43,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:43,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:44,036 INFO L130 PetriNetUnfolder]: 219/656 cut-off events. [2022-11-21 09:05:44,036 INFO L131 PetriNetUnfolder]: For 3305/3311 co-relation queries the response was YES. [2022-11-21 09:05:44,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 656 events. 219/656 cut-off events. For 3305/3311 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3850 event pairs, 48 based on Foata normal form. 4/653 useless extension candidates. Maximal degree in co-relation 2534. Up to 144 conditions per place. [2022-11-21 09:05:44,044 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-11-21 09:05:44,044 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1840 flow [2022-11-21 09:05:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:05:44,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:05:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-11-21 09:05:44,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-11-21 09:05:44,046 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-11-21 09:05:44,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-11-21 09:05:44,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:44,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-11-21 09:05:44,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,049 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,049 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1053 flow. Second operand 8 states and 561 transitions. [2022-11-21 09:05:44,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1840 flow [2022-11-21 09:05:44,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1780 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-11-21 09:05:44,066 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1403 flow [2022-11-21 09:05:44,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-11-21 09:05:44,067 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-11-21 09:05:44,068 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1403 flow [2022-11-21 09:05:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,068 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:44,068 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-21 09:05:44,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash -18586231, now seen corresponding path program 1 times [2022-11-21 09:05:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:44,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080435843] [2022-11-21 09:05:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:44,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080435843] [2022-11-21 09:05:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080435843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:44,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438050516] [2022-11-21 09:05:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:44,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:44,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:44,118 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:44,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 09:05:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:05:44,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438050516] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:44,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:05:44,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-21 09:05:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825296746] [2022-11-21 09:05:44,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:44,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:44,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:44,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:44,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-21 09:05:44,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:44,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:44,265 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:44,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:44,441 INFO L130 PetriNetUnfolder]: 226/667 cut-off events. [2022-11-21 09:05:44,441 INFO L131 PetriNetUnfolder]: For 4628/4628 co-relation queries the response was YES. [2022-11-21 09:05:44,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 667 events. 226/667 cut-off events. For 4628/4628 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3810 event pairs, 29 based on Foata normal form. 7/668 useless extension candidates. Maximal degree in co-relation 2795. Up to 201 conditions per place. [2022-11-21 09:05:44,451 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 108 selfloop transitions, 52 changer transitions 2/211 dead transitions. [2022-11-21 09:05:44,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 211 transitions, 2317 flow [2022-11-21 09:05:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:44,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:05:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2022-11-21 09:05:44,453 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898193760262726 [2022-11-21 09:05:44,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2022-11-21 09:05:44,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2022-11-21 09:05:44,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:44,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2022-11-21 09:05:44,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,456 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1403 flow. Second operand 7 states and 481 transitions. [2022-11-21 09:05:44,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 211 transitions, 2317 flow [2022-11-21 09:05:44,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2265 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-11-21 09:05:44,480 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1761 flow [2022-11-21 09:05:44,480 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2022-11-21 09:05:44,481 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2022-11-21 09:05:44,481 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1761 flow [2022-11-21 09:05:44,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:44,482 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:44,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:44,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:44,687 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2090104067, now seen corresponding path program 2 times [2022-11-21 09:05:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49802144] [2022-11-21 09:05:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:44,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49802144] [2022-11-21 09:05:44,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49802144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:44,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:44,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451223873] [2022-11-21 09:05:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:44,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:44,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:44,744 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:44,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1761 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:44,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:44,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:44,949 INFO L130 PetriNetUnfolder]: 215/671 cut-off events. [2022-11-21 09:05:44,949 INFO L131 PetriNetUnfolder]: For 5050/5057 co-relation queries the response was YES. [2022-11-21 09:05:44,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2921 conditions, 671 events. 215/671 cut-off events. For 5050/5057 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3896 event pairs, 49 based on Foata normal form. 7/670 useless extension candidates. Maximal degree in co-relation 2879. Up to 155 conditions per place. [2022-11-21 09:05:44,958 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 121 selfloop transitions, 34 changer transitions 5/209 dead transitions. [2022-11-21 09:05:44,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 209 transitions, 2367 flow [2022-11-21 09:05:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:44,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:05:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-11-21 09:05:44,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-11-21 09:05:44,962 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-11-21 09:05:44,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-11-21 09:05:44,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:44,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-11-21 09:05:44,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,965 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,965 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1761 flow. Second operand 7 states and 486 transitions. [2022-11-21 09:05:44,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 209 transitions, 2367 flow [2022-11-21 09:05:44,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2282 flow, removed 35 selfloop flow, removed 1 redundant places. [2022-11-21 09:05:44,993 INFO L231 Difference]: Finished difference. Result has 161 places, 174 transitions, 1753 flow [2022-11-21 09:05:44,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=161, PETRI_TRANSITIONS=174} [2022-11-21 09:05:44,994 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 84 predicate places. [2022-11-21 09:05:44,994 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 174 transitions, 1753 flow [2022-11-21 09:05:44,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:44,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:44,995 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-21 09:05:44,995 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 583671365, now seen corresponding path program 3 times [2022-11-21 09:05:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041767770] [2022-11-21 09:05:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:45,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041767770] [2022-11-21 09:05:45,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041767770] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:45,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:45,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821471492] [2022-11-21 09:05:45,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:45,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:45,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:45,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:45,051 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:45,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 174 transitions, 1753 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:45,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:45,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:45,294 INFO L130 PetriNetUnfolder]: 235/740 cut-off events. [2022-11-21 09:05:45,294 INFO L131 PetriNetUnfolder]: For 5864/5870 co-relation queries the response was YES. [2022-11-21 09:05:45,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 740 events. 235/740 cut-off events. For 5864/5870 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4476 event pairs, 60 based on Foata normal form. 7/740 useless extension candidates. Maximal degree in co-relation 3171. Up to 177 conditions per place. [2022-11-21 09:05:45,310 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 130 selfloop transitions, 62 changer transitions 2/243 dead transitions. [2022-11-21 09:05:45,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 243 transitions, 2818 flow [2022-11-21 09:05:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:05:45,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:05:45,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-11-21 09:05:45,313 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-11-21 09:05:45,313 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-11-21 09:05:45,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-11-21 09:05:45,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:45,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-11-21 09:05:45,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,316 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,316 INFO L175 Difference]: Start difference. First operand has 161 places, 174 transitions, 1753 flow. Second operand 8 states and 566 transitions. [2022-11-21 09:05:45,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 243 transitions, 2818 flow [2022-11-21 09:05:45,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 243 transitions, 2712 flow, removed 35 selfloop flow, removed 7 redundant places. [2022-11-21 09:05:45,347 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2121 flow [2022-11-21 09:05:45,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2121, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2022-11-21 09:05:45,349 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 86 predicate places. [2022-11-21 09:05:45,349 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2121 flow [2022-11-21 09:05:45,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:45,349 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:45,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-21 09:05:45,350 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 673278061, now seen corresponding path program 3 times [2022-11-21 09:05:45,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:45,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619843651] [2022-11-21 09:05:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:45,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619843651] [2022-11-21 09:05:45,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619843651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:45,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518334733] [2022-11-21 09:05:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:05:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:45,404 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:45,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 09:05:45,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 09:05:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:45,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:05:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:45,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518334733] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:45,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:05:45,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-21 09:05:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618161601] [2022-11-21 09:05:45,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:45,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:45,563 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:45,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2121 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:45,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:45,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:45,803 INFO L130 PetriNetUnfolder]: 254/863 cut-off events. [2022-11-21 09:05:45,803 INFO L131 PetriNetUnfolder]: For 6593/6603 co-relation queries the response was YES. [2022-11-21 09:05:45,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3618 conditions, 863 events. 254/863 cut-off events. For 6593/6603 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5588 event pairs, 50 based on Foata normal form. 12/865 useless extension candidates. Maximal degree in co-relation 3576. Up to 172 conditions per place. [2022-11-21 09:05:45,817 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 105 selfloop transitions, 87 changer transitions 2/243 dead transitions. [2022-11-21 09:05:45,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 243 transitions, 3013 flow [2022-11-21 09:05:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:05:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 09:05:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-11-21 09:05:45,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-11-21 09:05:45,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-11-21 09:05:45,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-11-21 09:05:45,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:45,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-11-21 09:05:45,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,822 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,822 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2121 flow. Second operand 6 states and 428 transitions. [2022-11-21 09:05:45,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 243 transitions, 3013 flow [2022-11-21 09:05:45,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 243 transitions, 2969 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-11-21 09:05:45,857 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 2657 flow [2022-11-21 09:05:45,857 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2657, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2022-11-21 09:05:45,858 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 96 predicate places. [2022-11-21 09:05:45,858 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 2657 flow [2022-11-21 09:05:45,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:45,859 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:45,859 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:45,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:46,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-21 09:05:46,065 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-11-21 09:05:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137943103] [2022-11-21 09:05:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137943103] [2022-11-21 09:05:46,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137943103] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:46,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:46,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:46,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794402860] [2022-11-21 09:05:46,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:46,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:46,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:46,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:46,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:46,126 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:46,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 2657 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:46,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:46,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:46,380 INFO L130 PetriNetUnfolder]: 239/785 cut-off events. [2022-11-21 09:05:46,380 INFO L131 PetriNetUnfolder]: For 8136/8159 co-relation queries the response was YES. [2022-11-21 09:05:46,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3748 conditions, 785 events. 239/785 cut-off events. For 8136/8159 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4865 event pairs, 46 based on Foata normal form. 5/781 useless extension candidates. Maximal degree in co-relation 3701. Up to 182 conditions per place. [2022-11-21 09:05:46,391 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 137 selfloop transitions, 54 changer transitions 5/245 dead transitions. [2022-11-21 09:05:46,391 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 245 transitions, 3361 flow [2022-11-21 09:05:46,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:05:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:05:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-11-21 09:05:46,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-11-21 09:05:46,393 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-11-21 09:05:46,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-11-21 09:05:46,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:46,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-11-21 09:05:46,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,396 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,396 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 2657 flow. Second operand 8 states and 554 transitions. [2022-11-21 09:05:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 245 transitions, 3361 flow [2022-11-21 09:05:46,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 245 transitions, 3272 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-11-21 09:05:46,438 INFO L231 Difference]: Finished difference. Result has 178 places, 212 transitions, 2843 flow [2022-11-21 09:05:46,439 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=178, PETRI_TRANSITIONS=212} [2022-11-21 09:05:46,445 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 101 predicate places. [2022-11-21 09:05:46,445 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 212 transitions, 2843 flow [2022-11-21 09:05:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:46,446 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:46,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-21 09:05:46,446 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:46,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1327072255, now seen corresponding path program 5 times [2022-11-21 09:05:46,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:46,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436563735] [2022-11-21 09:05:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:46,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:46,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436563735] [2022-11-21 09:05:46,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436563735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:46,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:46,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:46,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331029514] [2022-11-21 09:05:46,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:46,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:46,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:46,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:46,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:46,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:46,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 212 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:46,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:46,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:46,779 INFO L130 PetriNetUnfolder]: 246/769 cut-off events. [2022-11-21 09:05:46,779 INFO L131 PetriNetUnfolder]: For 9295/9308 co-relation queries the response was YES. [2022-11-21 09:05:46,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 769 events. 246/769 cut-off events. For 9295/9308 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4612 event pairs, 48 based on Foata normal form. 8/768 useless extension candidates. Maximal degree in co-relation 3807. Up to 190 conditions per place. [2022-11-21 09:05:46,791 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-11-21 09:05:46,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 261 transitions, 3773 flow [2022-11-21 09:05:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:05:46,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:05:46,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-11-21 09:05:46,793 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-21 09:05:46,793 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-11-21 09:05:46,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-11-21 09:05:46,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:46,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-11-21 09:05:46,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,796 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,797 INFO L175 Difference]: Start difference. First operand has 178 places, 212 transitions, 2843 flow. Second operand 8 states and 568 transitions. [2022-11-21 09:05:46,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 261 transitions, 3773 flow [2022-11-21 09:05:46,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 3658 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-11-21 09:05:46,838 INFO L231 Difference]: Finished difference. Result has 178 places, 222 transitions, 3252 flow [2022-11-21 09:05:46,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3252, PETRI_PLACES=178, PETRI_TRANSITIONS=222} [2022-11-21 09:05:46,840 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 101 predicate places. [2022-11-21 09:05:46,840 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 222 transitions, 3252 flow [2022-11-21 09:05:46,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:46,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:46,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:46,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-21 09:05:46,841 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1183988775, now seen corresponding path program 4 times [2022-11-21 09:05:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920122266] [2022-11-21 09:05:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:46,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:46,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920122266] [2022-11-21 09:05:46,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920122266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:46,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873285658] [2022-11-21 09:05:46,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:05:46,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:46,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:46,891 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:46,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 09:05:46,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:05:46,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:05:46,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 09:05:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:47,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:47,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873285658] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:47,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 09:05:47,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-21 09:05:47,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597783303] [2022-11-21 09:05:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:47,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:47,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:47,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-21 09:05:47,075 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:47,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 222 transitions, 3252 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:47,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:47,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:47,293 INFO L130 PetriNetUnfolder]: 230/712 cut-off events. [2022-11-21 09:05:47,293 INFO L131 PetriNetUnfolder]: For 10488/10488 co-relation queries the response was YES. [2022-11-21 09:05:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3772 conditions, 712 events. 230/712 cut-off events. For 10488/10488 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4075 event pairs, 47 based on Foata normal form. 8/715 useless extension candidates. Maximal degree in co-relation 3725. Up to 229 conditions per place. [2022-11-21 09:05:47,304 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 131 selfloop transitions, 67 changer transitions 0/247 dead transitions. [2022-11-21 09:05:47,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 247 transitions, 3814 flow [2022-11-21 09:05:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 09:05:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-21 09:05:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-11-21 09:05:47,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-21 09:05:47,306 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-11-21 09:05:47,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-11-21 09:05:47,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:47,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-11-21 09:05:47,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,308 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,309 INFO L175 Difference]: Start difference. First operand has 178 places, 222 transitions, 3252 flow. Second operand 6 states and 426 transitions. [2022-11-21 09:05:47,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 247 transitions, 3814 flow [2022-11-21 09:05:47,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 247 transitions, 3783 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-21 09:05:47,349 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 3383 flow [2022-11-21 09:05:47,350 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3383, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2022-11-21 09:05:47,350 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 107 predicate places. [2022-11-21 09:05:47,350 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 3383 flow [2022-11-21 09:05:47,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:47,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:47,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 09:05:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:47,557 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:47,557 INFO L85 PathProgramCache]: Analyzing trace with hash 722837219, now seen corresponding path program 5 times [2022-11-21 09:05:47,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:47,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996830771] [2022-11-21 09:05:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:47,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996830771] [2022-11-21 09:05:47,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996830771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:47,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:47,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:47,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275293536] [2022-11-21 09:05:47,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:47,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:47,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:47,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:47,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:47,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:47,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 3383 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:47,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:47,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:47,836 INFO L130 PetriNetUnfolder]: 225/705 cut-off events. [2022-11-21 09:05:47,836 INFO L131 PetriNetUnfolder]: For 11281/11283 co-relation queries the response was YES. [2022-11-21 09:05:47,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 705 events. 225/705 cut-off events. For 11281/11283 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4046 event pairs, 60 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3817. Up to 195 conditions per place. [2022-11-21 09:05:47,846 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-11-21 09:05:47,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 238 transitions, 3813 flow [2022-11-21 09:05:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:05:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-21 09:05:47,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-21 09:05:47,848 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-21 09:05:47,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-21 09:05:47,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:47,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-21 09:05:47,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,851 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,851 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 3383 flow. Second operand 7 states and 483 transitions. [2022-11-21 09:05:47,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 238 transitions, 3813 flow [2022-11-21 09:05:47,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 238 transitions, 3762 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-21 09:05:47,892 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 3241 flow [2022-11-21 09:05:47,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3241, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2022-11-21 09:05:47,893 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 113 predicate places. [2022-11-21 09:05:47,893 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 3241 flow [2022-11-21 09:05:47,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,893 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:47,894 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-21 09:05:47,894 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash -716007245, now seen corresponding path program 6 times [2022-11-21 09:05:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:47,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876566002] [2022-11-21 09:05:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:47,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:47,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876566002] [2022-11-21 09:05:47,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876566002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:47,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:47,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:47,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627239514] [2022-11-21 09:05:47,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:47,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:47,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:47,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:47,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:47,946 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:47,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 3241 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:47,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:47,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:47,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:48,179 INFO L130 PetriNetUnfolder]: 213/644 cut-off events. [2022-11-21 09:05:48,180 INFO L131 PetriNetUnfolder]: For 10624/10626 co-relation queries the response was YES. [2022-11-21 09:05:48,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 644 events. 213/644 cut-off events. For 10624/10626 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3502 event pairs, 52 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3541. Up to 195 conditions per place. [2022-11-21 09:05:48,189 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-11-21 09:05:48,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 224 transitions, 3508 flow [2022-11-21 09:05:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 09:05:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 09:05:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-11-21 09:05:48,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-11-21 09:05:48,192 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-11-21 09:05:48,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-11-21 09:05:48,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:48,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-11-21 09:05:48,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,195 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,196 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 3241 flow. Second operand 8 states and 550 transitions. [2022-11-21 09:05:48,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 224 transitions, 3508 flow [2022-11-21 09:05:48,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 224 transitions, 3422 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-21 09:05:48,237 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 3029 flow [2022-11-21 09:05:48,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3029, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2022-11-21 09:05:48,238 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 112 predicate places. [2022-11-21 09:05:48,239 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 3029 flow [2022-11-21 09:05:48,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:48,239 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:48,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-21 09:05:48,240 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:48,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1936559719, now seen corresponding path program 6 times [2022-11-21 09:05:48,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:48,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964321111] [2022-11-21 09:05:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:48,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964321111] [2022-11-21 09:05:48,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964321111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:05:48,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 09:05:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 09:05:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025557294] [2022-11-21 09:05:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:05:48,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 09:05:48,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 09:05:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 09:05:48,286 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-21 09:05:48,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 3029 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:48,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-21 09:05:48,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:05:48,492 INFO L130 PetriNetUnfolder]: 196/570 cut-off events. [2022-11-21 09:05:48,492 INFO L131 PetriNetUnfolder]: For 9943/9945 co-relation queries the response was YES. [2022-11-21 09:05:48,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 570 events. 196/570 cut-off events. For 9943/9945 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2895 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3269. Up to 190 conditions per place. [2022-11-21 09:05:48,501 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-11-21 09:05:48,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 206 transitions, 3219 flow [2022-11-21 09:05:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 09:05:48,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 09:05:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-11-21 09:05:48,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-11-21 09:05:48,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-11-21 09:05:48,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-11-21 09:05:48,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:05:48,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-11-21 09:05:48,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,506 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 3029 flow. Second operand 7 states and 480 transitions. [2022-11-21 09:05:48,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 206 transitions, 3219 flow [2022-11-21 09:05:48,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 206 transitions, 3107 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-21 09:05:48,544 INFO L231 Difference]: Finished difference. Result has 179 places, 188 transitions, 2779 flow [2022-11-21 09:05:48,544 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2779, PETRI_PLACES=179, PETRI_TRANSITIONS=188} [2022-11-21 09:05:48,544 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 102 predicate places. [2022-11-21 09:05:48,545 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 188 transitions, 2779 flow [2022-11-21 09:05:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:48,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:05:48,545 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:05:48,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-21 09:05:48,546 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:05:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:05:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1114847643, now seen corresponding path program 1 times [2022-11-21 09:05:48,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:05:48,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037102158] [2022-11-21 09:05:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:05:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:48,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:05:48,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037102158] [2022-11-21 09:05:48,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037102158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:05:48,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744106924] [2022-11-21 09:05:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:05:48,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:05:48,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:05:48,904 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:05:48,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 09:05:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:05:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:05:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:05:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:49,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:05:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:05:50,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744106924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:05:50,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:05:50,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:05:50,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870064186] [2022-11-21 09:05:50,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:05:50,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:05:50,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:05:50,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:05:50,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:05:50,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:05:50,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 2779 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:05:50,096 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:05:50,096 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:05:50,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:04,761 INFO L130 PetriNetUnfolder]: 972/2270 cut-off events. [2022-11-21 09:06:04,761 INFO L131 PetriNetUnfolder]: For 37612/37612 co-relation queries the response was YES. [2022-11-21 09:06:04,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13607 conditions, 2270 events. 972/2270 cut-off events. For 37612/37612 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15354 event pairs, 39 based on Foata normal form. 3/2257 useless extension candidates. Maximal degree in co-relation 13560. Up to 363 conditions per place. [2022-11-21 09:06:04,840 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 856 changer transitions 17/1159 dead transitions. [2022-11-21 09:06:04,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1159 transitions, 18153 flow [2022-11-21 09:06:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-11-21 09:06:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-11-21 09:06:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-11-21 09:06:04,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-11-21 09:06:04,862 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-11-21 09:06:04,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-11-21 09:06:04,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:04,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-11-21 09:06:04,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:04,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:04,931 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:04,931 INFO L175 Difference]: Start difference. First operand has 179 places, 188 transitions, 2779 flow. Second operand 224 states and 11784 transitions. [2022-11-21 09:06:04,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1159 transitions, 18153 flow [2022-11-21 09:06:05,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1159 transitions, 17303 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-11-21 09:06:05,050 INFO L231 Difference]: Finished difference. Result has 448 places, 990 transitions, 16193 flow [2022-11-21 09:06:05,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=16193, PETRI_PLACES=448, PETRI_TRANSITIONS=990} [2022-11-21 09:06:05,051 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 371 predicate places. [2022-11-21 09:06:05,051 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 990 transitions, 16193 flow [2022-11-21 09:06:05,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:05,052 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:05,052 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:05,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:05,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:05,260 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:05,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1415311341, now seen corresponding path program 2 times [2022-11-21 09:06:05,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:05,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284850753] [2022-11-21 09:06:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:05,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:05,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284850753] [2022-11-21 09:06:05,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284850753] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:05,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392313181] [2022-11-21 09:06:05,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:06:05,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:05,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:05,537 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:05,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 09:06:05,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:06,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392313181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:06,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:06:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341486445] [2022-11-21 09:06:06,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:06:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:06:06,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:06:06,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:06,783 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 990 transitions, 16193 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:06,783 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:06,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:06,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:11,095 INFO L130 PetriNetUnfolder]: 1106/2980 cut-off events. [2022-11-21 09:06:11,095 INFO L131 PetriNetUnfolder]: For 138750/138750 co-relation queries the response was YES. [2022-11-21 09:06:11,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24559 conditions, 2980 events. 1106/2980 cut-off events. For 138750/138750 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24173 event pairs, 46 based on Foata normal form. 1/2968 useless extension candidates. Maximal degree in co-relation 24451. Up to 439 conditions per place. [2022-11-21 09:06:11,156 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 763 changer transitions 45/1207 dead transitions. [2022-11-21 09:06:11,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1207 transitions, 23297 flow [2022-11-21 09:06:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-21 09:06:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-21 09:06:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-11-21 09:06:11,163 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-11-21 09:06:11,163 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-11-21 09:06:11,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-11-21 09:06:11,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:11,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-11-21 09:06:11,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,181 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,181 INFO L175 Difference]: Start difference. First operand has 448 places, 990 transitions, 16193 flow. Second operand 64 states and 3489 transitions. [2022-11-21 09:06:11,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1207 transitions, 23297 flow [2022-11-21 09:06:11,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1207 transitions, 21727 flow, removed 512 selfloop flow, removed 15 redundant places. [2022-11-21 09:06:11,681 INFO L231 Difference]: Finished difference. Result has 508 places, 1036 transitions, 17562 flow [2022-11-21 09:06:11,682 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=14838, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17562, PETRI_PLACES=508, PETRI_TRANSITIONS=1036} [2022-11-21 09:06:11,682 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 431 predicate places. [2022-11-21 09:06:11,683 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1036 transitions, 17562 flow [2022-11-21 09:06:11,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:11,683 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:11,684 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:11,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:11,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-21 09:06:11,886 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:11,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:11,886 INFO L85 PathProgramCache]: Analyzing trace with hash -964687289, now seen corresponding path program 3 times [2022-11-21 09:06:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644325863] [2022-11-21 09:06:11,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:11,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644325863] [2022-11-21 09:06:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644325863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325889882] [2022-11-21 09:06:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:06:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:12,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:12,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 09:06:12,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 09:06:12,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:12,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:12,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:12,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:13,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325889882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:13,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:13,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:06:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228156941] [2022-11-21 09:06:13,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:13,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:06:13,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:06:13,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:06:13,316 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:13,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1036 transitions, 17562 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:13,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:13,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:13,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:17,383 INFO L130 PetriNetUnfolder]: 1087/2972 cut-off events. [2022-11-21 09:06:17,384 INFO L131 PetriNetUnfolder]: For 158462/158462 co-relation queries the response was YES. [2022-11-21 09:06:17,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25697 conditions, 2972 events. 1087/2972 cut-off events. For 158462/158462 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24315 event pairs, 60 based on Foata normal form. 2/2947 useless extension candidates. Maximal degree in co-relation 25580. Up to 415 conditions per place. [2022-11-21 09:06:17,446 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 775 changer transitions 31/1184 dead transitions. [2022-11-21 09:06:17,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1184 transitions, 23458 flow [2022-11-21 09:06:17,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-21 09:06:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-21 09:06:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-11-21 09:06:17,454 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-11-21 09:06:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-11-21 09:06:17,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-11-21 09:06:17,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:17,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-11-21 09:06:17,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:17,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:17,475 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:17,476 INFO L175 Difference]: Start difference. First operand has 508 places, 1036 transitions, 17562 flow. Second operand 66 states and 3577 transitions. [2022-11-21 09:06:17,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1184 transitions, 23458 flow [2022-11-21 09:06:18,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1184 transitions, 21690 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-11-21 09:06:18,075 INFO L231 Difference]: Finished difference. Result has 538 places, 1053 transitions, 18083 flow [2022-11-21 09:06:18,076 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15907, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=18083, PETRI_PLACES=538, PETRI_TRANSITIONS=1053} [2022-11-21 09:06:18,077 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 461 predicate places. [2022-11-21 09:06:18,077 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1053 transitions, 18083 flow [2022-11-21 09:06:18,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:18,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:18,078 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:18,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:18,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-21 09:06:18,284 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -854241643, now seen corresponding path program 4 times [2022-11-21 09:06:18,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:18,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453582010] [2022-11-21 09:06:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:18,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453582010] [2022-11-21 09:06:18,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453582010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:18,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361261109] [2022-11-21 09:06:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:06:18,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:18,562 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:18,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 09:06:18,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:06:18,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:18,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 09:06:18,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:19,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361261109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:19,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:19,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:06:19,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693695721] [2022-11-21 09:06:19,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:19,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:06:19,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:06:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:06:19,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:19,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1053 transitions, 18083 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:19,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:19,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:19,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:22,054 INFO L130 PetriNetUnfolder]: 1074/2983 cut-off events. [2022-11-21 09:06:22,054 INFO L131 PetriNetUnfolder]: For 167419/167419 co-relation queries the response was YES. [2022-11-21 09:06:22,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26015 conditions, 2983 events. 1074/2983 cut-off events. For 167419/167419 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24638 event pairs, 96 based on Foata normal form. 3/2958 useless extension candidates. Maximal degree in co-relation 25890. Up to 461 conditions per place. [2022-11-21 09:06:22,099 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 657 selfloop transitions, 455 changer transitions 16/1167 dead transitions. [2022-11-21 09:06:22,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1167 transitions, 23178 flow [2022-11-21 09:06:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 09:06:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-21 09:06:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2009 transitions. [2022-11-21 09:06:22,104 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6414431673052363 [2022-11-21 09:06:22,104 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2009 transitions. [2022-11-21 09:06:22,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2009 transitions. [2022-11-21 09:06:22,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:22,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2009 transitions. [2022-11-21 09:06:22,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.80555555555556) internal successors, (2009), 36 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:22,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:22,113 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:22,114 INFO L175 Difference]: Start difference. First operand has 538 places, 1053 transitions, 18083 flow. Second operand 36 states and 2009 transitions. [2022-11-21 09:06:22,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1167 transitions, 23178 flow [2022-11-21 09:06:22,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1167 transitions, 21484 flow, removed 130 selfloop flow, removed 51 redundant places. [2022-11-21 09:06:22,719 INFO L231 Difference]: Finished difference. Result has 518 places, 1068 transitions, 17703 flow [2022-11-21 09:06:22,720 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16511, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17703, PETRI_PLACES=518, PETRI_TRANSITIONS=1068} [2022-11-21 09:06:22,720 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 441 predicate places. [2022-11-21 09:06:22,721 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1068 transitions, 17703 flow [2022-11-21 09:06:22,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:22,721 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:22,721 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:22,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-21 09:06:22,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-21 09:06:22,932 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash 224014263, now seen corresponding path program 5 times [2022-11-21 09:06:22,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:22,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290463034] [2022-11-21 09:06:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:23,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290463034] [2022-11-21 09:06:23,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290463034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:23,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843167278] [2022-11-21 09:06:23,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:06:23,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:23,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:23,339 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:23,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 09:06:23,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:06:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:23,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:24,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843167278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:24,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:24,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:06:24,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466104968] [2022-11-21 09:06:24,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:24,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:06:24,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:24,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:06:24,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:06:24,276 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:24,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1068 transitions, 17703 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:24,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:24,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:24,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:27,059 INFO L130 PetriNetUnfolder]: 1137/3117 cut-off events. [2022-11-21 09:06:27,060 INFO L131 PetriNetUnfolder]: For 164410/164410 co-relation queries the response was YES. [2022-11-21 09:06:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26780 conditions, 3117 events. 1137/3117 cut-off events. For 164410/164410 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26117 event pairs, 70 based on Foata normal form. 2/3078 useless extension candidates. Maximal degree in co-relation 26658. Up to 616 conditions per place. [2022-11-21 09:06:27,107 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 315 selfloop transitions, 904 changer transitions 21/1279 dead transitions. [2022-11-21 09:06:27,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1279 transitions, 24408 flow [2022-11-21 09:06:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 09:06:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-21 09:06:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2441 transitions. [2022-11-21 09:06:27,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6234993614303959 [2022-11-21 09:06:27,111 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2441 transitions. [2022-11-21 09:06:27,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2441 transitions. [2022-11-21 09:06:27,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:27,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2441 transitions. [2022-11-21 09:06:27,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.24444444444445) internal successors, (2441), 45 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,122 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:27,123 INFO L175 Difference]: Start difference. First operand has 518 places, 1068 transitions, 17703 flow. Second operand 45 states and 2441 transitions. [2022-11-21 09:06:27,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1279 transitions, 24408 flow [2022-11-21 09:06:28,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 1279 transitions, 23609 flow, removed 32 selfloop flow, removed 21 redundant places. [2022-11-21 09:06:28,229 INFO L231 Difference]: Finished difference. Result has 557 places, 1180 transitions, 21608 flow [2022-11-21 09:06:28,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16952, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21608, PETRI_PLACES=557, PETRI_TRANSITIONS=1180} [2022-11-21 09:06:28,230 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 480 predicate places. [2022-11-21 09:06:28,231 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1180 transitions, 21608 flow [2022-11-21 09:06:28,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:28,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:28,231 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:28,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:28,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-21 09:06:28,442 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:28,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1185976805, now seen corresponding path program 6 times [2022-11-21 09:06:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:28,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611811778] [2022-11-21 09:06:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:28,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:28,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611811778] [2022-11-21 09:06:28,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611811778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:28,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425138766] [2022-11-21 09:06:28,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:06:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:28,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:28,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:28,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 09:06:28,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-21 09:06:28,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:28,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:28,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:29,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:29,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425138766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:29,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:29,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:06:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895076248] [2022-11-21 09:06:29,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:06:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:06:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:06:29,788 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:29,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1180 transitions, 21608 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:29,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:29,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:29,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:33,854 INFO L130 PetriNetUnfolder]: 1182/3299 cut-off events. [2022-11-21 09:06:33,854 INFO L131 PetriNetUnfolder]: For 188830/188830 co-relation queries the response was YES. [2022-11-21 09:06:33,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30156 conditions, 3299 events. 1182/3299 cut-off events. For 188830/188830 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27715 event pairs, 64 based on Foata normal form. 1/3272 useless extension candidates. Maximal degree in co-relation 30019. Up to 430 conditions per place. [2022-11-21 09:06:33,913 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 446 selfloop transitions, 865 changer transitions 39/1389 dead transitions. [2022-11-21 09:06:33,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1389 transitions, 30131 flow [2022-11-21 09:06:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-21 09:06:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-21 09:06:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3350 transitions. [2022-11-21 09:06:33,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6312417561710948 [2022-11-21 09:06:33,919 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3350 transitions. [2022-11-21 09:06:33,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3350 transitions. [2022-11-21 09:06:33,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:33,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3350 transitions. [2022-11-21 09:06:33,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.91803278688525) internal successors, (3350), 61 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,932 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:33,933 INFO L175 Difference]: Start difference. First operand has 557 places, 1180 transitions, 21608 flow. Second operand 61 states and 3350 transitions. [2022-11-21 09:06:33,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1389 transitions, 30131 flow [2022-11-21 09:06:34,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1389 transitions, 29577 flow, removed 182 selfloop flow, removed 15 redundant places. [2022-11-21 09:06:34,835 INFO L231 Difference]: Finished difference. Result has 616 places, 1225 transitions, 24478 flow [2022-11-21 09:06:34,836 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21284, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=24478, PETRI_PLACES=616, PETRI_TRANSITIONS=1225} [2022-11-21 09:06:34,837 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 539 predicate places. [2022-11-21 09:06:34,837 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1225 transitions, 24478 flow [2022-11-21 09:06:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:34,837 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:34,838 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:34,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-21 09:06:35,043 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2039424553, now seen corresponding path program 7 times [2022-11-21 09:06:35,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716641952] [2022-11-21 09:06:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:35,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:35,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716641952] [2022-11-21 09:06:35,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716641952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:35,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232330634] [2022-11-21 09:06:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:06:35,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:35,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:35,395 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:35,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 09:06:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:35,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:35,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:35,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:36,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232330634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:36,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:36,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:06:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853877720] [2022-11-21 09:06:36,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:06:36,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:06:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:06:36,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:36,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1225 transitions, 24478 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:36,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:36,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:36,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:46,639 INFO L130 PetriNetUnfolder]: 1198/3291 cut-off events. [2022-11-21 09:06:46,639 INFO L131 PetriNetUnfolder]: For 196984/196984 co-relation queries the response was YES. [2022-11-21 09:06:46,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 3291 events. 1198/3291 cut-off events. For 196984/196984 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27649 event pairs, 88 based on Foata normal form. 3/3252 useless extension candidates. Maximal degree in co-relation 31767. Up to 685 conditions per place. [2022-11-21 09:06:46,785 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 317 selfloop transitions, 1020 changer transitions 22/1398 dead transitions. [2022-11-21 09:06:46,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1398 transitions, 32296 flow [2022-11-21 09:06:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-21 09:06:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2022-11-21 09:06:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 7993 transitions. [2022-11-21 09:06:46,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6084341934992769 [2022-11-21 09:06:46,800 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 7993 transitions. [2022-11-21 09:06:46,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 7993 transitions. [2022-11-21 09:06:46,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:46,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 7993 transitions. [2022-11-21 09:06:46,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 52.93377483443709) internal successors, (7993), 151 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 87.0) internal successors, (13224), 152 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,838 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 87.0) internal successors, (13224), 152 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:46,838 INFO L175 Difference]: Start difference. First operand has 616 places, 1225 transitions, 24478 flow. Second operand 151 states and 7993 transitions. [2022-11-21 09:06:46,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1398 transitions, 32296 flow [2022-11-21 09:06:47,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 1398 transitions, 31313 flow, removed 29 selfloop flow, removed 41 redundant places. [2022-11-21 09:06:47,981 INFO L231 Difference]: Finished difference. Result has 730 places, 1262 transitions, 26677 flow [2022-11-21 09:06:47,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23591, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=26677, PETRI_PLACES=730, PETRI_TRANSITIONS=1262} [2022-11-21 09:06:47,983 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 653 predicate places. [2022-11-21 09:06:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 1262 transitions, 26677 flow [2022-11-21 09:06:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:47,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:06:47,984 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:06:47,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 09:06:48,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-21 09:06:48,189 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:06:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:06:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1811834131, now seen corresponding path program 8 times [2022-11-21 09:06:48,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:06:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777907681] [2022-11-21 09:06:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:06:48,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:06:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:06:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:06:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777907681] [2022-11-21 09:06:48,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777907681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:06:48,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647439258] [2022-11-21 09:06:48,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:06:48,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:06:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:06:48,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:06:48,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 09:06:48,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:06:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:06:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:06:48,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:06:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:48,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:06:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:06:49,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647439258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:06:49,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:06:49,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:06:49,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339053349] [2022-11-21 09:06:49,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:06:49,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:06:49,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:06:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:06:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:06:49,568 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:06:49,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 1262 transitions, 26677 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:49,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:06:49,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:06:49,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:06:59,145 INFO L130 PetriNetUnfolder]: 1229/3366 cut-off events. [2022-11-21 09:06:59,145 INFO L131 PetriNetUnfolder]: For 208168/208168 co-relation queries the response was YES. [2022-11-21 09:06:59,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33914 conditions, 3366 events. 1229/3366 cut-off events. For 208168/208168 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 28525 event pairs, 97 based on Foata normal form. 3/3324 useless extension candidates. Maximal degree in co-relation 33756. Up to 775 conditions per place. [2022-11-21 09:06:59,207 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 288 selfloop transitions, 1054 changer transitions 28/1409 dead transitions. [2022-11-21 09:06:59,207 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 1409 transitions, 33398 flow [2022-11-21 09:06:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-21 09:06:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-11-21 09:06:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7707 transitions. [2022-11-21 09:06:59,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6067548417572036 [2022-11-21 09:06:59,216 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7707 transitions. [2022-11-21 09:06:59,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7707 transitions. [2022-11-21 09:06:59,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:06:59,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7707 transitions. [2022-11-21 09:06:59,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.78767123287671) internal successors, (7707), 146 states have internal predecessors, (7707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:59,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:59,244 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:06:59,244 INFO L175 Difference]: Start difference. First operand has 730 places, 1262 transitions, 26677 flow. Second operand 146 states and 7707 transitions. [2022-11-21 09:06:59,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 1409 transitions, 33398 flow [2022-11-21 09:07:00,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 1409 transitions, 32093 flow, removed 42 selfloop flow, removed 114 redundant places. [2022-11-21 09:07:00,261 INFO L231 Difference]: Finished difference. Result has 771 places, 1284 transitions, 28332 flow [2022-11-21 09:07:00,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=25406, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=28332, PETRI_PLACES=771, PETRI_TRANSITIONS=1284} [2022-11-21 09:07:00,264 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 694 predicate places. [2022-11-21 09:07:00,264 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1284 transitions, 28332 flow [2022-11-21 09:07:00,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:00,265 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:00,265 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:00,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:00,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:00,471 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:00,472 INFO L85 PathProgramCache]: Analyzing trace with hash -909114679, now seen corresponding path program 9 times [2022-11-21 09:07:00,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:00,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371242110] [2022-11-21 09:07:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:00,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:00,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371242110] [2022-11-21 09:07:00,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371242110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195533456] [2022-11-21 09:07:00,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:07:00,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:00,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:00,826 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:00,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 09:07:00,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:07:00,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:00,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:01,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:01,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:01,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195533456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:01,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:01,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:07:01,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999311482] [2022-11-21 09:07:01,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:01,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:07:01,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:07:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:07:01,882 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:01,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1284 transitions, 28332 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:01,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:01,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:01,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:06,179 INFO L130 PetriNetUnfolder]: 1372/3788 cut-off events. [2022-11-21 09:07:06,179 INFO L131 PetriNetUnfolder]: For 243875/243875 co-relation queries the response was YES. [2022-11-21 09:07:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38942 conditions, 3788 events. 1372/3788 cut-off events. For 243875/243875 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32786 event pairs, 85 based on Foata normal form. 4/3747 useless extension candidates. Maximal degree in co-relation 38775. Up to 648 conditions per place. [2022-11-21 09:07:06,243 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 290 selfloop transitions, 1319 changer transitions 19/1667 dead transitions. [2022-11-21 09:07:06,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 1667 transitions, 39937 flow [2022-11-21 09:07:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-21 09:07:06,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-21 09:07:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-11-21 09:07:06,249 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-11-21 09:07:06,249 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-11-21 09:07:06,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-11-21 09:07:06,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:06,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-11-21 09:07:06,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:06,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:06,260 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:06,261 INFO L175 Difference]: Start difference. First operand has 771 places, 1284 transitions, 28332 flow. Second operand 60 states and 3187 transitions. [2022-11-21 09:07:06,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 1667 transitions, 39937 flow [2022-11-21 09:07:07,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 1667 transitions, 37666 flow, removed 44 selfloop flow, removed 125 redundant places. [2022-11-21 09:07:07,740 INFO L231 Difference]: Finished difference. Result has 723 places, 1591 transitions, 37297 flow [2022-11-21 09:07:07,741 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=26550, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=37297, PETRI_PLACES=723, PETRI_TRANSITIONS=1591} [2022-11-21 09:07:07,742 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 646 predicate places. [2022-11-21 09:07:07,742 INFO L495 AbstractCegarLoop]: Abstraction has has 723 places, 1591 transitions, 37297 flow [2022-11-21 09:07:07,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:07,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:07,743 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:07,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-21 09:07:07,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-21 09:07:07,948 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1046933349, now seen corresponding path program 10 times [2022-11-21 09:07:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482456475] [2022-11-21 09:07:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:07,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482456475] [2022-11-21 09:07:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482456475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:08,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487926808] [2022-11-21 09:07:08,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:07:08,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:08,250 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:08,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 09:07:08,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:07:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 09:07:08,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:08,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:09,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487926808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:09,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:09,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:07:09,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030328661] [2022-11-21 09:07:09,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:07:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:09,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:07:09,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:07:09,230 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:09,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 1591 transitions, 37297 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:09,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:09,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:09,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:16,296 INFO L130 PetriNetUnfolder]: 1437/3867 cut-off events. [2022-11-21 09:07:16,297 INFO L131 PetriNetUnfolder]: For 298801/298801 co-relation queries the response was YES. [2022-11-21 09:07:16,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43514 conditions, 3867 events. 1437/3867 cut-off events. For 298801/298801 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 33384 event pairs, 161 based on Foata normal form. 1/3812 useless extension candidates. Maximal degree in co-relation 43329. Up to 1001 conditions per place. [2022-11-21 09:07:16,379 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 766 selfloop transitions, 1007 changer transitions 30/1842 dead transitions. [2022-11-21 09:07:16,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 1842 transitions, 47883 flow [2022-11-21 09:07:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-21 09:07:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-11-21 09:07:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5537 transitions. [2022-11-21 09:07:16,482 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6119584438549955 [2022-11-21 09:07:16,483 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5537 transitions. [2022-11-21 09:07:16,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5537 transitions. [2022-11-21 09:07:16,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:16,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5537 transitions. [2022-11-21 09:07:16,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 53.24038461538461) internal successors, (5537), 104 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:16,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 87.0) internal successors, (9135), 105 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:16,502 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 87.0) internal successors, (9135), 105 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:16,502 INFO L175 Difference]: Start difference. First operand has 723 places, 1591 transitions, 37297 flow. Second operand 104 states and 5537 transitions. [2022-11-21 09:07:16,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 1842 transitions, 47883 flow [2022-11-21 09:07:18,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 1842 transitions, 45889 flow, removed 799 selfloop flow, removed 23 redundant places. [2022-11-21 09:07:18,475 INFO L231 Difference]: Finished difference. Result has 818 places, 1701 transitions, 40869 flow [2022-11-21 09:07:18,476 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=36473, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=40869, PETRI_PLACES=818, PETRI_TRANSITIONS=1701} [2022-11-21 09:07:18,477 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 741 predicate places. [2022-11-21 09:07:18,477 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 1701 transitions, 40869 flow [2022-11-21 09:07:18,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:18,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:18,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:18,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:18,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-21 09:07:18,680 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:18,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:18,681 INFO L85 PathProgramCache]: Analyzing trace with hash 564764429, now seen corresponding path program 11 times [2022-11-21 09:07:18,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:18,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593239710] [2022-11-21 09:07:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:18,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:18,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593239710] [2022-11-21 09:07:18,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593239710] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:18,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016343331] [2022-11-21 09:07:18,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:07:18,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:18,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:18,951 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:18,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 09:07:19,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:19,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:19,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:20,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016343331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:20,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:20,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:07:20,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842060628] [2022-11-21 09:07:20,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:20,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:07:20,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:20,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:07:20,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:07:20,146 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:20,147 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 1701 transitions, 40869 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:20,147 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:20,147 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:20,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:27,764 INFO L130 PetriNetUnfolder]: 1479/4079 cut-off events. [2022-11-21 09:07:27,764 INFO L131 PetriNetUnfolder]: For 264584/264584 co-relation queries the response was YES. [2022-11-21 09:07:27,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 4079 events. 1479/4079 cut-off events. For 264584/264584 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36343 event pairs, 118 based on Foata normal form. 4/4023 useless extension candidates. Maximal degree in co-relation 43591. Up to 869 conditions per place. [2022-11-21 09:07:27,855 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 507 selfloop transitions, 1299 changer transitions 32/1877 dead transitions. [2022-11-21 09:07:27,855 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 1877 transitions, 49601 flow [2022-11-21 09:07:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-21 09:07:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-21 09:07:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5152 transitions. [2022-11-21 09:07:27,860 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2022-11-21 09:07:27,860 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5152 transitions. [2022-11-21 09:07:27,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5152 transitions. [2022-11-21 09:07:27,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:27,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5152 transitions. [2022-11-21 09:07:27,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 53.666666666666664) internal successors, (5152), 96 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:27,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 87.0) internal successors, (8439), 97 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:27,877 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 87.0) internal successors, (8439), 97 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:27,877 INFO L175 Difference]: Start difference. First operand has 818 places, 1701 transitions, 40869 flow. Second operand 96 states and 5152 transitions. [2022-11-21 09:07:27,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 1877 transitions, 49601 flow [2022-11-21 09:07:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 863 places, 1877 transitions, 46775 flow, removed 790 selfloop flow, removed 42 redundant places. [2022-11-21 09:07:30,003 INFO L231 Difference]: Finished difference. Result has 880 places, 1718 transitions, 43012 flow [2022-11-21 09:07:30,004 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39458, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=43012, PETRI_PLACES=880, PETRI_TRANSITIONS=1718} [2022-11-21 09:07:30,004 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 803 predicate places. [2022-11-21 09:07:30,005 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 1718 transitions, 43012 flow [2022-11-21 09:07:30,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:30,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:30,005 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:30,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-21 09:07:30,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:30,217 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:30,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:30,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1321052287, now seen corresponding path program 12 times [2022-11-21 09:07:30,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:30,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536922869] [2022-11-21 09:07:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:30,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536922869] [2022-11-21 09:07:30,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536922869] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:30,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394621242] [2022-11-21 09:07:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:07:30,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:30,461 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 09:07:30,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-21 09:07:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:07:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:30,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:31,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394621242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:31,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:31,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:07:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568957165] [2022-11-21 09:07:31,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:07:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:07:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:07:31,294 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:31,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1718 transitions, 43012 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:31,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:31,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:31,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:36,103 INFO L130 PetriNetUnfolder]: 1528/4303 cut-off events. [2022-11-21 09:07:36,103 INFO L131 PetriNetUnfolder]: For 160301/160301 co-relation queries the response was YES. [2022-11-21 09:07:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41742 conditions, 4303 events. 1528/4303 cut-off events. For 160301/160301 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39249 event pairs, 89 based on Foata normal form. 4/4272 useless extension candidates. Maximal degree in co-relation 41534. Up to 775 conditions per place. [2022-11-21 09:07:36,184 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 438 selfloop transitions, 1289 changer transitions 73/1839 dead transitions. [2022-11-21 09:07:36,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 923 places, 1839 transitions, 49512 flow [2022-11-21 09:07:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-21 09:07:36,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-21 09:07:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2958 transitions. [2022-11-21 09:07:36,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2022-11-21 09:07:36,187 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2958 transitions. [2022-11-21 09:07:36,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2958 transitions. [2022-11-21 09:07:36,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:36,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2958 transitions. [2022-11-21 09:07:36,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.78181818181818) internal successors, (2958), 55 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:36,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:36,192 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:36,193 INFO L175 Difference]: Start difference. First operand has 880 places, 1718 transitions, 43012 flow. Second operand 55 states and 2958 transitions. [2022-11-21 09:07:36,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 923 places, 1839 transitions, 49512 flow [2022-11-21 09:07:38,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 1839 transitions, 47139 flow, removed 48 selfloop flow, removed 90 redundant places. [2022-11-21 09:07:38,176 INFO L231 Difference]: Finished difference. Result has 840 places, 1703 transitions, 42933 flow [2022-11-21 09:07:38,178 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40681, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=42933, PETRI_PLACES=840, PETRI_TRANSITIONS=1703} [2022-11-21 09:07:38,178 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-11-21 09:07:38,178 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1703 transitions, 42933 flow [2022-11-21 09:07:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:38,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:38,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:38,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:38,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-21 09:07:38,379 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2112767601, now seen corresponding path program 13 times [2022-11-21 09:07:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130377936] [2022-11-21 09:07:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:38,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:38,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130377936] [2022-11-21 09:07:38,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130377936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:38,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204203598] [2022-11-21 09:07:38,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:07:38,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:38,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:38,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:38,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 09:07:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:39,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204203598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:39,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:39,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:07:39,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702719830] [2022-11-21 09:07:39,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:39,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:07:39,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:39,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:07:39,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:07:39,778 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:39,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1703 transitions, 42933 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:39,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:39,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:39,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:07:53,387 INFO L130 PetriNetUnfolder]: 1411/3874 cut-off events. [2022-11-21 09:07:53,387 INFO L131 PetriNetUnfolder]: For 146876/146876 co-relation queries the response was YES. [2022-11-21 09:07:53,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38705 conditions, 3874 events. 1411/3874 cut-off events. For 146876/146876 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33707 event pairs, 97 based on Foata normal form. 3/3843 useless extension candidates. Maximal degree in co-relation 38503. Up to 685 conditions per place. [2022-11-21 09:07:53,456 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1379 changer transitions 32/1878 dead transitions. [2022-11-21 09:07:53,456 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 1878 transitions, 50070 flow [2022-11-21 09:07:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-21 09:07:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2022-11-21 09:07:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 10240 transitions. [2022-11-21 09:07:53,466 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6067069558004503 [2022-11-21 09:07:53,466 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 10240 transitions. [2022-11-21 09:07:53,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 10240 transitions. [2022-11-21 09:07:53,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:07:53,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 10240 transitions. [2022-11-21 09:07:53,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 52.78350515463917) internal successors, (10240), 194 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:53,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 87.0) internal successors, (16965), 195 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:53,492 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 87.0) internal successors, (16965), 195 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:53,492 INFO L175 Difference]: Start difference. First operand has 840 places, 1703 transitions, 42933 flow. Second operand 194 states and 10240 transitions. [2022-11-21 09:07:53,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 1878 transitions, 50070 flow [2022-11-21 09:07:54,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 971 places, 1878 transitions, 47311 flow, removed 93 selfloop flow, removed 51 redundant places. [2022-11-21 09:07:55,021 INFO L231 Difference]: Finished difference. Result has 980 places, 1688 transitions, 42840 flow [2022-11-21 09:07:55,022 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40325, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=42840, PETRI_PLACES=980, PETRI_TRANSITIONS=1688} [2022-11-21 09:07:55,022 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 903 predicate places. [2022-11-21 09:07:55,022 INFO L495 AbstractCegarLoop]: Abstraction has has 980 places, 1688 transitions, 42840 flow [2022-11-21 09:07:55,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:55,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:07:55,023 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:07:55,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 09:07:55,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:55,224 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:07:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:07:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2003443767, now seen corresponding path program 14 times [2022-11-21 09:07:55,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:07:55,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262297720] [2022-11-21 09:07:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:07:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:07:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:07:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:07:55,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262297720] [2022-11-21 09:07:55,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262297720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:07:55,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367676451] [2022-11-21 09:07:55,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:07:55,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:07:55,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:07:55,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:07:55,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 09:07:55,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:07:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:07:55,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:07:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:07:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:55,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:07:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:07:56,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367676451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:07:56,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:07:56,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:07:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052283240] [2022-11-21 09:07:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:07:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:07:56,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:07:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:07:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:07:56,562 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:07:56,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1688 transitions, 42840 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:07:56,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:07:56,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:07:56,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:08:01,294 INFO L130 PetriNetUnfolder]: 1408/3827 cut-off events. [2022-11-21 09:08:01,294 INFO L131 PetriNetUnfolder]: For 140484/140484 co-relation queries the response was YES. [2022-11-21 09:08:01,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38533 conditions, 3827 events. 1408/3827 cut-off events. For 140484/140484 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33058 event pairs, 79 based on Foata normal form. 1/3798 useless extension candidates. Maximal degree in co-relation 38333. Up to 556 conditions per place. [2022-11-21 09:08:01,367 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1425 changer transitions 9/1755 dead transitions. [2022-11-21 09:08:01,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 1755 transitions, 47523 flow [2022-11-21 09:08:01,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-21 09:08:01,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-21 09:08:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3178 transitions. [2022-11-21 09:08:01,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6088122605363985 [2022-11-21 09:08:01,371 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3178 transitions. [2022-11-21 09:08:01,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3178 transitions. [2022-11-21 09:08:01,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:08:01,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3178 transitions. [2022-11-21 09:08:01,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.96666666666667) internal successors, (3178), 60 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:01,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:01,377 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:01,377 INFO L175 Difference]: Start difference. First operand has 980 places, 1688 transitions, 42840 flow. Second operand 60 states and 3178 transitions. [2022-11-21 09:08:01,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 1755 transitions, 47523 flow [2022-11-21 09:08:02,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 1755 transitions, 44885 flow, removed 21 selfloop flow, removed 177 redundant places. [2022-11-21 09:08:02,818 INFO L231 Difference]: Finished difference. Result has 848 places, 1692 transitions, 43226 flow [2022-11-21 09:08:02,819 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40234, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=43226, PETRI_PLACES=848, PETRI_TRANSITIONS=1692} [2022-11-21 09:08:02,819 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 771 predicate places. [2022-11-21 09:08:02,819 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 1692 transitions, 43226 flow [2022-11-21 09:08:02,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:02,819 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:08:02,819 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:02,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-21 09:08:03,020 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:08:03,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash -203984005, now seen corresponding path program 15 times [2022-11-21 09:08:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:03,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851671407] [2022-11-21 09:08:03,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:03,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:08:03,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851671407] [2022-11-21 09:08:03,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851671407] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:03,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410021440] [2022-11-21 09:08:03,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:08:03,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:03,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:03,283 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:08:03,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 09:08:03,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-21 09:08:03,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:08:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:03,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:04,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410021440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:04,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:08:04,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:08:04,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074623766] [2022-11-21 09:08:04,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:04,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:08:04,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:08:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:08:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:08:04,409 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:08:04,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 1692 transitions, 43226 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:04,411 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:08:04,411 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:08:04,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:08:17,853 INFO L130 PetriNetUnfolder]: 1406/3821 cut-off events. [2022-11-21 09:08:17,854 INFO L131 PetriNetUnfolder]: For 141263/141263 co-relation queries the response was YES. [2022-11-21 09:08:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38953 conditions, 3821 events. 1406/3821 cut-off events. For 141263/141263 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32986 event pairs, 98 based on Foata normal form. 3/3789 useless extension candidates. Maximal degree in co-relation 38758. Up to 685 conditions per place. [2022-11-21 09:08:17,927 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 421 selfloop transitions, 1368 changer transitions 31/1859 dead transitions. [2022-11-21 09:08:17,927 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 1859 transitions, 50191 flow [2022-11-21 09:08:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-21 09:08:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-11-21 09:08:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 10131 transitions. [2022-11-21 09:08:17,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6065014367816092 [2022-11-21 09:08:17,933 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 10131 transitions. [2022-11-21 09:08:17,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 10131 transitions. [2022-11-21 09:08:17,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:08:17,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 10131 transitions. [2022-11-21 09:08:17,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 52.765625) internal successors, (10131), 192 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:17,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 87.0) internal successors, (16791), 193 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:17,963 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 87.0) internal successors, (16791), 193 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:17,963 INFO L175 Difference]: Start difference. First operand has 848 places, 1692 transitions, 43226 flow. Second operand 192 states and 10131 transitions. [2022-11-21 09:08:17,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 1859 transitions, 50191 flow [2022-11-21 09:08:19,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 1859 transitions, 47871 flow, removed 8 selfloop flow, removed 47 redundant places. [2022-11-21 09:08:19,413 INFO L231 Difference]: Finished difference. Result has 994 places, 1676 transitions, 43458 flow [2022-11-21 09:08:19,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=41010, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=43458, PETRI_PLACES=994, PETRI_TRANSITIONS=1676} [2022-11-21 09:08:19,415 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 917 predicate places. [2022-11-21 09:08:19,416 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 1676 transitions, 43458 flow [2022-11-21 09:08:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:19,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:08:19,416 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:19,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:19,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-21 09:08:19,622 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:08:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:19,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1807636801, now seen corresponding path program 16 times [2022-11-21 09:08:19,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:19,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28316180] [2022-11-21 09:08:19,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:19,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:19,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:08:19,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28316180] [2022-11-21 09:08:19,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28316180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584540770] [2022-11-21 09:08:19,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:08:19,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:19,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:19,912 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:08:19,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 09:08:19,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:08:19,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-21 09:08:19,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:20,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:20,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584540770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:20,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:08:20,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:08:20,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154699212] [2022-11-21 09:08:20,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:20,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:08:20,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:08:20,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:08:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:08:20,784 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:08:20,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 1676 transitions, 43458 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:20,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:08:20,786 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:08:20,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:08:28,560 INFO L130 PetriNetUnfolder]: 1537/3991 cut-off events. [2022-11-21 09:08:28,561 INFO L131 PetriNetUnfolder]: For 152228/152228 co-relation queries the response was YES. [2022-11-21 09:08:28,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42319 conditions, 3991 events. 1537/3991 cut-off events. For 152228/152228 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33834 event pairs, 173 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 42120. Up to 1087 conditions per place. [2022-11-21 09:08:28,670 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 757 selfloop transitions, 1202 changer transitions 14/2012 dead transitions. [2022-11-21 09:08:28,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 2012 transitions, 54868 flow [2022-11-21 09:08:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-21 09:08:28,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-21 09:08:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 6640 transitions. [2022-11-21 09:08:28,677 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6057288815909505 [2022-11-21 09:08:28,677 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 6640 transitions. [2022-11-21 09:08:28,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 6640 transitions. [2022-11-21 09:08:28,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:08:28,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 6640 transitions. [2022-11-21 09:08:28,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 52.698412698412696) internal successors, (6640), 126 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:28,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 87.0) internal successors, (11049), 127 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:28,698 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 87.0) internal successors, (11049), 127 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:28,698 INFO L175 Difference]: Start difference. First operand has 994 places, 1676 transitions, 43458 flow. Second operand 126 states and 6640 transitions. [2022-11-21 09:08:28,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 2012 transitions, 54868 flow [2022-11-21 09:08:30,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 2012 transitions, 51587 flow, removed 12 selfloop flow, removed 191 redundant places. [2022-11-21 09:08:30,311 INFO L231 Difference]: Finished difference. Result has 925 places, 1919 transitions, 48749 flow [2022-11-21 09:08:30,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40651, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=48749, PETRI_PLACES=925, PETRI_TRANSITIONS=1919} [2022-11-21 09:08:30,313 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 848 predicate places. [2022-11-21 09:08:30,313 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 1919 transitions, 48749 flow [2022-11-21 09:08:30,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:30,313 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:08:30,313 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:30,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:30,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-21 09:08:30,514 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:08:30,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash 530943853, now seen corresponding path program 17 times [2022-11-21 09:08:30,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505713714] [2022-11-21 09:08:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:08:30,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505713714] [2022-11-21 09:08:30,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505713714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:30,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540075405] [2022-11-21 09:08:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:08:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:30,752 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:08:30,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 09:08:30,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-21 09:08:30,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:30,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:08:30,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:31,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:31,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540075405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:31,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:08:31,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:08:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282596473] [2022-11-21 09:08:31,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:31,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:08:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:08:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:08:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:08:31,574 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:08:31,575 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 1919 transitions, 48749 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:31,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:08:31,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:08:31,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:08:35,674 INFO L130 PetriNetUnfolder]: 1768/4458 cut-off events. [2022-11-21 09:08:35,674 INFO L131 PetriNetUnfolder]: For 167503/167503 co-relation queries the response was YES. [2022-11-21 09:08:35,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48078 conditions, 4458 events. 1768/4458 cut-off events. For 167503/167503 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 37750 event pairs, 97 based on Foata normal form. 1/4422 useless extension candidates. Maximal degree in co-relation 47874. Up to 884 conditions per place. [2022-11-21 09:08:35,783 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 695 selfloop transitions, 1611 changer transitions 9/2354 dead transitions. [2022-11-21 09:08:35,783 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2354 transitions, 64079 flow [2022-11-21 09:08:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 09:08:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-21 09:08:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-11-21 09:08:35,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-11-21 09:08:35,786 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-11-21 09:08:35,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-11-21 09:08:35,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:08:35,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-11-21 09:08:35,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:35,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:35,790 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:35,790 INFO L175 Difference]: Start difference. First operand has 925 places, 1919 transitions, 48749 flow. Second operand 44 states and 2351 transitions. [2022-11-21 09:08:35,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2354 transitions, 64079 flow [2022-11-21 09:08:37,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 924 places, 2354 transitions, 62671 flow, removed 154 selfloop flow, removed 38 redundant places. [2022-11-21 09:08:37,914 INFO L231 Difference]: Finished difference. Result has 953 places, 2278 transitions, 62390 flow [2022-11-21 09:08:37,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47642, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=62390, PETRI_PLACES=953, PETRI_TRANSITIONS=2278} [2022-11-21 09:08:37,916 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 876 predicate places. [2022-11-21 09:08:37,916 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 2278 transitions, 62390 flow [2022-11-21 09:08:37,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:37,916 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:08:37,916 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:37,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:38,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-21 09:08:38,117 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:08:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash 870611143, now seen corresponding path program 18 times [2022-11-21 09:08:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236659798] [2022-11-21 09:08:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:38,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:38,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:08:38,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236659798] [2022-11-21 09:08:38,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236659798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:38,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688906501] [2022-11-21 09:08:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-21 09:08:38,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:38,401 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:08:38,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 09:08:38,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-21 09:08:38,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:08:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:08:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:38,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:39,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:39,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688906501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:39,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:08:39,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-21 09:08:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535474707] [2022-11-21 09:08:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:39,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 09:08:39,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:08:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 09:08:39,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 09:08:39,298 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:08:39,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 2278 transitions, 62390 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:39,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:08:39,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:08:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:08:45,800 INFO L130 PetriNetUnfolder]: 2183/5294 cut-off events. [2022-11-21 09:08:45,800 INFO L131 PetriNetUnfolder]: For 218703/218703 co-relation queries the response was YES. [2022-11-21 09:08:45,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62447 conditions, 5294 events. 2183/5294 cut-off events. For 218703/218703 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44985 event pairs, 115 based on Foata normal form. 1/5256 useless extension candidates. Maximal degree in co-relation 62222. Up to 1080 conditions per place. [2022-11-21 09:08:45,910 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 998 selfloop transitions, 1955 changer transitions 9/3001 dead transitions. [2022-11-21 09:08:45,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 3001 transitions, 87849 flow [2022-11-21 09:08:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-21 09:08:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-21 09:08:45,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-11-21 09:08:45,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-11-21 09:08:45,913 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-11-21 09:08:45,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-11-21 09:08:45,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:08:45,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-11-21 09:08:45,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.416666666666664) internal successors, (1923), 36 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:45,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:45,917 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:45,918 INFO L175 Difference]: Start difference. First operand has 953 places, 2278 transitions, 62390 flow. Second operand 36 states and 1923 transitions. [2022-11-21 09:08:45,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 3001 transitions, 87849 flow [2022-11-21 09:08:48,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 973 places, 3001 transitions, 87554 flow, removed 60 selfloop flow, removed 11 redundant places. [2022-11-21 09:08:48,937 INFO L231 Difference]: Finished difference. Result has 994 places, 2912 transitions, 86232 flow [2022-11-21 09:08:48,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=62154, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=86232, PETRI_PLACES=994, PETRI_TRANSITIONS=2912} [2022-11-21 09:08:48,938 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 917 predicate places. [2022-11-21 09:08:48,938 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 2912 transitions, 86232 flow [2022-11-21 09:08:48,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:48,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:08:48,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:08:48,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 09:08:49,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:49,140 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:08:49,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:08:49,140 INFO L85 PathProgramCache]: Analyzing trace with hash 863753387, now seen corresponding path program 19 times [2022-11-21 09:08:49,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:08:49,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134827525] [2022-11-21 09:08:49,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:08:49,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:08:49,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:49,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:08:49,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134827525] [2022-11-21 09:08:49,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134827525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:08:49,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772567726] [2022-11-21 09:08:49,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-21 09:08:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:08:49,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:08:49,396 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:08:49,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 09:08:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:08:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:08:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:08:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:08:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:08:50,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772567726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:08:50,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:08:50,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:08:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442203594] [2022-11-21 09:08:50,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:08:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:08:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:08:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:08:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:08:50,519 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:08:50,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 2912 transitions, 86232 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:08:50,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:08:50,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:08:50,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:09:01,542 INFO L130 PetriNetUnfolder]: 2414/5774 cut-off events. [2022-11-21 09:09:01,542 INFO L131 PetriNetUnfolder]: For 264904/264904 co-relation queries the response was YES. [2022-11-21 09:09:01,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72608 conditions, 5774 events. 2414/5774 cut-off events. For 264904/264904 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49364 event pairs, 113 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 72366. Up to 1085 conditions per place. [2022-11-21 09:09:01,673 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1099 selfloop transitions, 2278 changer transitions 10/3426 dead transitions. [2022-11-21 09:09:01,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1076 places, 3426 transitions, 106724 flow [2022-11-21 09:09:01,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-21 09:09:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-21 09:09:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-11-21 09:09:01,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-11-21 09:09:01,678 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-11-21 09:09:01,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-11-21 09:09:01,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:09:01,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-11-21 09:09:01,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:01,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:01,688 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:01,688 INFO L175 Difference]: Start difference. First operand has 994 places, 2912 transitions, 86232 flow. Second operand 87 states and 4603 transitions. [2022-11-21 09:09:01,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1076 places, 3426 transitions, 106724 flow [2022-11-21 09:09:05,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1064 places, 3426 transitions, 106077 flow, removed 93 selfloop flow, removed 12 redundant places. [2022-11-21 09:09:05,570 INFO L231 Difference]: Finished difference. Result has 1091 places, 3320 transitions, 103566 flow [2022-11-21 09:09:05,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=85688, PETRI_DIFFERENCE_MINUEND_PLACES=978, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=103566, PETRI_PLACES=1091, PETRI_TRANSITIONS=3320} [2022-11-21 09:09:05,572 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1014 predicate places. [2022-11-21 09:09:05,572 INFO L495 AbstractCegarLoop]: Abstraction has has 1091 places, 3320 transitions, 103566 flow [2022-11-21 09:09:05,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:05,572 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:09:05,572 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:09:05,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 09:09:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:05,773 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:09:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:09:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1510788901, now seen corresponding path program 20 times [2022-11-21 09:09:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:09:05,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304066780] [2022-11-21 09:09:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:09:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:09:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:09:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:06,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:09:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304066780] [2022-11-21 09:09:06,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304066780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:09:06,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675274029] [2022-11-21 09:09:06,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 09:09:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:09:06,047 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:09:06,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 09:09:06,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:09:06,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:09:06,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:09:06,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:09:06,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:06,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:09:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:07,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675274029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:09:07,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:09:07,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:09:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612748645] [2022-11-21 09:09:07,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:09:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:09:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:09:07,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:09:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:09:07,118 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:09:07,119 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1091 places, 3320 transitions, 103566 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:07,119 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:09:07,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:09:07,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:09:17,229 INFO L130 PetriNetUnfolder]: 2415/5833 cut-off events. [2022-11-21 09:09:17,229 INFO L131 PetriNetUnfolder]: For 295241/295241 co-relation queries the response was YES. [2022-11-21 09:09:17,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76200 conditions, 5833 events. 2415/5833 cut-off events. For 295241/295241 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 50266 event pairs, 116 based on Foata normal form. 1/5795 useless extension candidates. Maximal degree in co-relation 75937. Up to 1109 conditions per place. [2022-11-21 09:09:17,375 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1373 selfloop transitions, 1985 changer transitions 10/3407 dead transitions. [2022-11-21 09:09:17,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1139 places, 3407 transitions, 112331 flow [2022-11-21 09:09:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-21 09:09:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-21 09:09:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-11-21 09:09:17,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-11-21 09:09:17,378 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-11-21 09:09:17,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-11-21 09:09:17,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:09:17,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-11-21 09:09:17,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:17,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:17,384 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:17,385 INFO L175 Difference]: Start difference. First operand has 1091 places, 3320 transitions, 103566 flow. Second operand 54 states and 2874 transitions. [2022-11-21 09:09:17,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1139 places, 3407 transitions, 112331 flow [2022-11-21 09:09:21,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1120 places, 3407 transitions, 111490 flow, removed 106 selfloop flow, removed 19 redundant places. [2022-11-21 09:09:21,992 INFO L231 Difference]: Finished difference. Result has 1130 places, 3346 transitions, 108253 flow [2022-11-21 09:09:21,993 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=102745, PETRI_DIFFERENCE_MINUEND_PLACES=1067, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=108253, PETRI_PLACES=1130, PETRI_TRANSITIONS=3346} [2022-11-21 09:09:21,994 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1053 predicate places. [2022-11-21 09:09:21,994 INFO L495 AbstractCegarLoop]: Abstraction has has 1130 places, 3346 transitions, 108253 flow [2022-11-21 09:09:21,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:21,994 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:09:21,994 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:09:22,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-21 09:09:22,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:22,195 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:09:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:09:22,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1100366519, now seen corresponding path program 21 times [2022-11-21 09:09:22,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:09:22,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978429454] [2022-11-21 09:09:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:09:22,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:09:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:09:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:09:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978429454] [2022-11-21 09:09:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978429454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:09:22,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133974268] [2022-11-21 09:09:22,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 09:09:22,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:22,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:09:22,439 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:09:22,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-21 09:09:22,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-21 09:09:22,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:09:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-21 09:09:22,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:09:22,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:22,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:09:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:23,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133974268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:09:23,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:09:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-21 09:09:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537924375] [2022-11-21 09:09:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:09:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 09:09:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:09:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 09:09:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 09:09:23,510 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:09:23,512 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1130 places, 3346 transitions, 108253 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:23,512 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:09:23,512 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:09:23,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:09:33,827 INFO L130 PetriNetUnfolder]: 2415/5842 cut-off events. [2022-11-21 09:09:33,827 INFO L131 PetriNetUnfolder]: For 328992/328992 co-relation queries the response was YES. [2022-11-21 09:09:33,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78594 conditions, 5842 events. 2415/5842 cut-off events. For 328992/328992 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 50395 event pairs, 118 based on Foata normal form. 1/5804 useless extension candidates. Maximal degree in co-relation 78329. Up to 1119 conditions per place. [2022-11-21 09:09:33,974 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1381 selfloop transitions, 1980 changer transitions 17/3417 dead transitions. [2022-11-21 09:09:33,974 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 3417 transitions, 116583 flow [2022-11-21 09:09:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-21 09:09:33,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-21 09:09:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-11-21 09:09:33,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-11-21 09:09:33,977 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-11-21 09:09:33,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-11-21 09:09:33,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:09:33,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-11-21 09:09:33,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.132075471698116) internal successors, (2816), 53 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:33,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:33,982 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:33,982 INFO L175 Difference]: Start difference. First operand has 1130 places, 3346 transitions, 108253 flow. Second operand 53 states and 2816 transitions. [2022-11-21 09:09:33,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 3417 transitions, 116583 flow [2022-11-21 09:09:39,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1149 places, 3417 transitions, 114301 flow, removed 22 selfloop flow, removed 28 redundant places. [2022-11-21 09:09:39,330 INFO L231 Difference]: Finished difference. Result has 1158 places, 3354 transitions, 110672 flow [2022-11-21 09:09:39,331 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=105980, PETRI_DIFFERENCE_MINUEND_PLACES=1097, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=110672, PETRI_PLACES=1158, PETRI_TRANSITIONS=3354} [2022-11-21 09:09:39,332 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1081 predicate places. [2022-11-21 09:09:39,332 INFO L495 AbstractCegarLoop]: Abstraction has has 1158 places, 3354 transitions, 110672 flow [2022-11-21 09:09:39,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:39,332 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:09:39,333 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:09:39,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-21 09:09:39,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:39,533 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:09:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:09:39,534 INFO L85 PathProgramCache]: Analyzing trace with hash -214192729, now seen corresponding path program 22 times [2022-11-21 09:09:39,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:09:39,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908757472] [2022-11-21 09:09:39,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:09:39,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:09:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:09:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:39,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:09:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908757472] [2022-11-21 09:09:39,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908757472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:09:39,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584064974] [2022-11-21 09:09:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 09:09:39,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:09:39,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:09:39,799 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:09:39,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-21 09:09:39,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 09:09:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:09:39,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-21 09:09:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:09:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:40,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 09:09:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:09:40,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584064974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 09:09:40,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 09:09:40,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-11-21 09:09:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724067753] [2022-11-21 09:09:40,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 09:09:40,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-21 09:09:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:09:40,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-21 09:09:40,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-21 09:09:40,716 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-21 09:09:40,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1158 places, 3354 transitions, 110672 flow. Second operand has 30 states, 30 states have (on average 50.9) internal successors, (1527), 30 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:09:40,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:09:40,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-21 09:09:40,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 09:09:59,863 INFO L130 PetriNetUnfolder]: 4304/9883 cut-off events. [2022-11-21 09:09:59,863 INFO L131 PetriNetUnfolder]: For 629312/629312 co-relation queries the response was YES. [2022-11-21 09:10:00,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139406 conditions, 9883 events. 4304/9883 cut-off events. For 629312/629312 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 90164 event pairs, 119 based on Foata normal form. 68/9908 useless extension candidates. Maximal degree in co-relation 139137. Up to 1760 conditions per place. [2022-11-21 09:10:00,359 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1919 selfloop transitions, 4223 changer transitions 28/6209 dead transitions. [2022-11-21 09:10:00,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1245 places, 6209 transitions, 215792 flow [2022-11-21 09:10:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-21 09:10:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2022-11-21 09:10:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 5207 transitions. [2022-11-21 09:10:00,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6107201501290171 [2022-11-21 09:10:00,364 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 5207 transitions. [2022-11-21 09:10:00,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 5207 transitions. [2022-11-21 09:10:00,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 09:10:00,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 5207 transitions. [2022-11-21 09:10:00,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 53.13265306122449) internal successors, (5207), 98 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:10:00,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:10:00,373 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 87.0) internal successors, (8613), 99 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:10:00,373 INFO L175 Difference]: Start difference. First operand has 1158 places, 3354 transitions, 110672 flow. Second operand 98 states and 5207 transitions. [2022-11-21 09:10:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1245 places, 6209 transitions, 215792 flow [2022-11-21 09:10:15,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1208 places, 6209 transitions, 209580 flow, removed 31 selfloop flow, removed 37 redundant places. [2022-11-21 09:10:15,706 INFO L231 Difference]: Finished difference. Result has 1256 places, 5838 transitions, 203580 flow [2022-11-21 09:10:15,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=107207, PETRI_DIFFERENCE_MINUEND_PLACES=1111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=203580, PETRI_PLACES=1256, PETRI_TRANSITIONS=5838} [2022-11-21 09:10:15,709 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1179 predicate places. [2022-11-21 09:10:15,709 INFO L495 AbstractCegarLoop]: Abstraction has has 1256 places, 5838 transitions, 203580 flow [2022-11-21 09:10:15,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 50.9) internal successors, (1527), 30 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:10:15,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 09:10:15,710 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 09:10:15,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-21 09:10:15,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-21 09:10:15,915 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-21 09:10:15,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 09:10:15,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1214576427, now seen corresponding path program 23 times [2022-11-21 09:10:15,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 09:10:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597815040] [2022-11-21 09:10:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 09:10:15,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 09:10:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 09:10:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:10:16,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 09:10:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597815040] [2022-11-21 09:10:16,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597815040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 09:10:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669932467] [2022-11-21 09:10:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-21 09:10:16,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 09:10:16,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 09:10:16,169 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 09:10:16,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_610801ff-247b-479d-a456-1b395fb9ebeb/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-21 09:10:16,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 09:10:16,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 09:10:16,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 09:10:16,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 09:10:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 09:10:16,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 09:10:16,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669932467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 09:10:16,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 09:10:16,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 25 [2022-11-21 09:10:16,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427601209] [2022-11-21 09:10:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 09:10:16,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 09:10:16,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 09:10:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 09:10:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-11-21 09:10:16,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-21 09:10:16,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1256 places, 5838 transitions, 203580 flow. Second operand has 15 states, 15 states have (on average 52.93333333333333) internal successors, (794), 15 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 09:10:16,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 09:10:16,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-21 09:10:16,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand