./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc --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 fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 --- 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-5e519f3 [2022-11-02 20:21:25,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:21:25,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:21:25,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:21:25,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:21:25,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:21:25,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:21:25,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:21:25,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:21:25,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:21:25,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:21:25,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:21:25,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:21:25,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:21:25,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:21:25,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:21:25,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:21:25,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:21:25,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:21:25,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:21:25,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:21:25,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:21:25,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:21:25,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:21:25,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:21:25,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:21:25,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:21:25,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:21:25,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:21:25,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:21:25,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:21:25,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:21:25,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:21:25,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:21:25,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:21:25,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:21:25,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:21:25,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:21:25,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:21:25,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:21:25,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:21:25,287 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:21:25,336 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:21:25,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:21:25,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:21:25,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:21:25,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:21:25,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:21:25,340 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:21:25,340 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:21:25,341 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:21:25,341 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:21:25,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:21:25,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:21:25,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:21:25,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:21:25,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:21:25,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:21:25,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:21:25,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:21:25,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:21:25,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:21:25,345 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:21:25,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:21:25,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:21:25,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:21:25,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:21:25,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:21:25,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:21:25,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:21:25,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:21:25,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:21:25,350 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:21:25,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:21:25,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:21:25,351 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_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd523f7f98069bc15a8892c75be26f15a858863c31fc6ea863dcd5f92e46c458 [2022-11-02 20:21:25,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:21:25,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:21:25,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:21:25,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:21:25,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:21:25,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-02 20:21:25,763 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/data/00ba356cd/effb3704f50f462ea6d1202ad4209ba9/FLAG9d34cd51e [2022-11-02 20:21:26,246 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:21:26,247 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c [2022-11-02 20:21:26,255 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/data/00ba356cd/effb3704f50f462ea6d1202ad4209ba9/FLAG9d34cd51e [2022-11-02 20:21:26,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/data/00ba356cd/effb3704f50f462ea6d1202ad4209ba9 [2022-11-02 20:21:26,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:21:26,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:21:26,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:21:26,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:21:26,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:21:26,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:21:26" (1/1) ... [2022-11-02 20:21:26,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7719ca05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:26, skipping insertion in model container [2022-11-02 20:21:26,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:21:26" (1/1) ... [2022-11-02 20:21:26,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:21:26,671 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:21:26,990 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-02 20:21:26,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:21:27,004 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:21:27,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/sv-benchmarks/c/weaver/popl20-figure1-alt.wvr.c[2087,2100] [2022-11-02 20:21:27,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:21:27,073 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:21:27,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27 WrapperNode [2022-11-02 20:21:27,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:21:27,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:21:27,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:21:27,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:21:27,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,128 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 76 [2022-11-02 20:21:27,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:21:27,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:21:27,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:21:27,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:21:27,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:21:27,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:21:27,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:21:27,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:21:27,160 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (1/1) ... [2022-11-02 20:21:27,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:21:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:27,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:21:27,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:21:27,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:21:27,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:21:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:21:27,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:21:27,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:21:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:21:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:21:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:21:27,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:21:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:21:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:21:27,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:21:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:21:27,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:21:27,260 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-02 20:21:27,376 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:21:27,379 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:21:27,667 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:21:27,751 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:21:27,752 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:21:27,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:21:27 BoogieIcfgContainer [2022-11-02 20:21:27,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:21:27,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:21:27,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:21:27,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:21:27,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:21:26" (1/3) ... [2022-11-02 20:21:27,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488acc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:21:27, skipping insertion in model container [2022-11-02 20:21:27,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:21:27" (2/3) ... [2022-11-02 20:21:27,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488acc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:21:27, skipping insertion in model container [2022-11-02 20:21:27,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:21:27" (3/3) ... [2022-11-02 20:21:27,781 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2022-11-02 20:21:27,792 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:21:27,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:21:27,834 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:21:27,835 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:21:27,901 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-02 20:21:27,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 194 flow [2022-11-02 20:21:28,098 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-02 20:21:28,099 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:21:28,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 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. 0/80 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2022-11-02 20:21:28,109 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 194 flow [2022-11-02 20:21:28,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 78 transitions, 168 flow [2022-11-02 20:21:28,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:21:28,162 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;@4d0f6909, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:21:28,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-02 20:21:28,228 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2022-11-02 20:21:28,228 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-02 20:21:28,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:28,230 INFO L208 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] [2022-11-02 20:21:28,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -522255947, now seen corresponding path program 1 times [2022-11-02 20:21:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:28,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889994880] [2022-11-02 20:21:28,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:30,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889994880] [2022-11-02 20:21:30,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889994880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:30,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:30,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:30,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250541309] [2022-11-02 20:21:30,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:30,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:30,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:30,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:30,280 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:30,292 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 168 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:30,292 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:30,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:30,913 INFO L130 PetriNetUnfolder]: 67/252 cut-off events. [2022-11-02 20:21:30,913 INFO L131 PetriNetUnfolder]: For 55/55 co-relation queries the response was YES. [2022-11-02 20:21:30,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 252 events. 67/252 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 968 event pairs, 34 based on Foata normal form. 9/227 useless extension candidates. Maximal degree in co-relation 292. Up to 102 conditions per place. [2022-11-02 20:21:30,922 INFO L137 encePairwiseOnDemand]: 70/89 looper letters, 43 selfloop transitions, 11 changer transitions 10/107 dead transitions. [2022-11-02 20:21:30,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 107 transitions, 375 flow [2022-11-02 20:21:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:21:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-02 20:21:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 872 transitions. [2022-11-02 20:21:30,959 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6531835205992509 [2022-11-02 20:21:30,960 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 872 transitions. [2022-11-02 20:21:30,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 872 transitions. [2022-11-02 20:21:30,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:30,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 872 transitions. [2022-11-02 20:21:30,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.13333333333333) internal successors, (872), 15 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:30,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 89.0) internal successors, (1424), 16 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:30,998 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 89.0) internal successors, (1424), 16 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:31,001 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 168 flow. Second operand 15 states and 872 transitions. [2022-11-02 20:21:31,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 107 transitions, 375 flow [2022-11-02 20:21:31,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 107 transitions, 353 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-02 20:21:31,020 INFO L231 Difference]: Finished difference. Result has 96 places, 79 transitions, 213 flow [2022-11-02 20:21:31,023 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=213, PETRI_PLACES=96, PETRI_TRANSITIONS=79} [2022-11-02 20:21:31,032 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 17 predicate places. [2022-11-02 20:21:31,032 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 79 transitions, 213 flow [2022-11-02 20:21:31,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:31,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:31,033 INFO L208 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] [2022-11-02 20:21:31,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:21:31,035 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:31,037 INFO L85 PathProgramCache]: Analyzing trace with hash 168602145, now seen corresponding path program 2 times [2022-11-02 20:21:31,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:31,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833888030] [2022-11-02 20:21:31,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:31,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:31,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:31,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833888030] [2022-11-02 20:21:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833888030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:31,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:31,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453061893] [2022-11-02 20:21:31,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:31,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:31,944 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:31,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 79 transitions, 213 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:31,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:31,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:31,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:32,460 INFO L130 PetriNetUnfolder]: 68/263 cut-off events. [2022-11-02 20:21:32,460 INFO L131 PetriNetUnfolder]: For 66/66 co-relation queries the response was YES. [2022-11-02 20:21:32,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 540 conditions, 263 events. 68/263 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1102 event pairs, 35 based on Foata normal form. 1/260 useless extension candidates. Maximal degree in co-relation 520. Up to 102 conditions per place. [2022-11-02 20:21:32,466 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 11 changer transitions 11/105 dead transitions. [2022-11-02 20:21:32,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 429 flow [2022-11-02 20:21:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:21:32,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:21:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 695 transitions. [2022-11-02 20:21:32,470 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.650749063670412 [2022-11-02 20:21:32,470 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 695 transitions. [2022-11-02 20:21:32,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 695 transitions. [2022-11-02 20:21:32,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:32,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 695 transitions. [2022-11-02 20:21:32,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,480 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,480 INFO L175 Difference]: Start difference. First operand has 96 places, 79 transitions, 213 flow. Second operand 12 states and 695 transitions. [2022-11-02 20:21:32,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 105 transitions, 429 flow [2022-11-02 20:21:32,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 105 transitions, 407 flow, removed 8 selfloop flow, removed 6 redundant places. [2022-11-02 20:21:32,492 INFO L231 Difference]: Finished difference. Result has 99 places, 80 transitions, 247 flow [2022-11-02 20:21:32,493 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=247, PETRI_PLACES=99, PETRI_TRANSITIONS=80} [2022-11-02 20:21:32,494 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 20 predicate places. [2022-11-02 20:21:32,494 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 80 transitions, 247 flow [2022-11-02 20:21:32,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:32,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:32,495 INFO L208 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] [2022-11-02 20:21:32,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:21:32,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1001813793, now seen corresponding path program 3 times [2022-11-02 20:21:32,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:32,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887903448] [2022-11-02 20:21:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:32,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:33,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:33,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887903448] [2022-11-02 20:21:33,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887903448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:33,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:33,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:33,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864760140] [2022-11-02 20:21:33,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:33,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:33,297 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:33,298 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 80 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:33,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:33,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:33,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:33,922 INFO L130 PetriNetUnfolder]: 72/296 cut-off events. [2022-11-02 20:21:33,922 INFO L131 PetriNetUnfolder]: For 174/174 co-relation queries the response was YES. [2022-11-02 20:21:33,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666 conditions, 296 events. 72/296 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1339 event pairs, 37 based on Foata normal form. 1/291 useless extension candidates. Maximal degree in co-relation 637. Up to 105 conditions per place. [2022-11-02 20:21:33,926 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 48 selfloop transitions, 14 changer transitions 8/113 dead transitions. [2022-11-02 20:21:33,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 113 transitions, 519 flow [2022-11-02 20:21:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:21:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:21:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 704 transitions. [2022-11-02 20:21:33,930 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6591760299625468 [2022-11-02 20:21:33,930 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 704 transitions. [2022-11-02 20:21:33,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 704 transitions. [2022-11-02 20:21:33,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:33,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 704 transitions. [2022-11-02 20:21:33,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.666666666666664) internal successors, (704), 12 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:33,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:33,938 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:33,938 INFO L175 Difference]: Start difference. First operand has 99 places, 80 transitions, 247 flow. Second operand 12 states and 704 transitions. [2022-11-02 20:21:33,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 113 transitions, 519 flow [2022-11-02 20:21:33,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 113 transitions, 474 flow, removed 14 selfloop flow, removed 9 redundant places. [2022-11-02 20:21:33,945 INFO L231 Difference]: Finished difference. Result has 103 places, 84 transitions, 301 flow [2022-11-02 20:21:33,945 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=301, PETRI_PLACES=103, PETRI_TRANSITIONS=84} [2022-11-02 20:21:33,946 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 24 predicate places. [2022-11-02 20:21:33,946 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 84 transitions, 301 flow [2022-11-02 20:21:33,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:33,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:33,948 INFO L208 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] [2022-11-02 20:21:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:21:33,948 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash -92412107, now seen corresponding path program 4 times [2022-11-02 20:21:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:33,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692131104] [2022-11-02 20:21:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:34,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692131104] [2022-11-02 20:21:34,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692131104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:34,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:34,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:34,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394403273] [2022-11-02 20:21:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:34,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:34,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:34,626 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:34,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 84 transitions, 301 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:34,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:34,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:34,928 INFO L130 PetriNetUnfolder]: 71/294 cut-off events. [2022-11-02 20:21:34,928 INFO L131 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2022-11-02 20:21:34,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 294 events. 71/294 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1350 event pairs, 38 based on Foata normal form. 1/288 useless extension candidates. Maximal degree in co-relation 652. Up to 105 conditions per place. [2022-11-02 20:21:34,933 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 15 changer transitions 6/114 dead transitions. [2022-11-02 20:21:34,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 559 flow [2022-11-02 20:21:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:21:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:21:34,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 703 transitions. [2022-11-02 20:21:34,938 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6582397003745318 [2022-11-02 20:21:34,939 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 703 transitions. [2022-11-02 20:21:34,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 703 transitions. [2022-11-02 20:21:34,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:34,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 703 transitions. [2022-11-02 20:21:34,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.583333333333336) internal successors, (703), 12 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:34,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:34,955 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:34,955 INFO L175 Difference]: Start difference. First operand has 103 places, 84 transitions, 301 flow. Second operand 12 states and 703 transitions. [2022-11-02 20:21:34,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 559 flow [2022-11-02 20:21:34,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 114 transitions, 520 flow, removed 11 selfloop flow, removed 8 redundant places. [2022-11-02 20:21:34,967 INFO L231 Difference]: Finished difference. Result has 109 places, 86 transitions, 352 flow [2022-11-02 20:21:34,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=352, PETRI_PLACES=109, PETRI_TRANSITIONS=86} [2022-11-02 20:21:34,970 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 30 predicate places. [2022-11-02 20:21:34,972 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 86 transitions, 352 flow [2022-11-02 20:21:34,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:34,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:34,974 INFO L208 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] [2022-11-02 20:21:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:21:34,974 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2028291361, now seen corresponding path program 5 times [2022-11-02 20:21:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:34,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954985665] [2022-11-02 20:21:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:34,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:35,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954985665] [2022-11-02 20:21:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954985665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:35,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:35,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:35,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492044294] [2022-11-02 20:21:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:35,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:35,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:35,683 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:35,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 86 transitions, 352 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:35,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:35,684 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:36,240 INFO L130 PetriNetUnfolder]: 71/280 cut-off events. [2022-11-02 20:21:36,241 INFO L131 PetriNetUnfolder]: For 306/306 co-relation queries the response was YES. [2022-11-02 20:21:36,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 280 events. 71/280 cut-off events. For 306/306 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1227 event pairs, 32 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 663. Up to 105 conditions per place. [2022-11-02 20:21:36,244 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 42 selfloop transitions, 14 changer transitions 9/108 dead transitions. [2022-11-02 20:21:36,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 108 transitions, 563 flow [2022-11-02 20:21:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:21:36,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:21:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 696 transitions. [2022-11-02 20:21:36,248 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2022-11-02 20:21:36,248 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 696 transitions. [2022-11-02 20:21:36,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 696 transitions. [2022-11-02 20:21:36,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:36,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 696 transitions. [2022-11-02 20:21:36,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 58.0) internal successors, (696), 12 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) [2022-11-02 20:21:36,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:36,255 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:36,255 INFO L175 Difference]: Start difference. First operand has 109 places, 86 transitions, 352 flow. Second operand 12 states and 696 transitions. [2022-11-02 20:21:36,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 108 transitions, 563 flow [2022-11-02 20:21:36,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 108 transitions, 526 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-11-02 20:21:36,262 INFO L231 Difference]: Finished difference. Result has 114 places, 86 transitions, 368 flow [2022-11-02 20:21:36,262 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=368, PETRI_PLACES=114, PETRI_TRANSITIONS=86} [2022-11-02 20:21:36,263 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 35 predicate places. [2022-11-02 20:21:36,263 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 86 transitions, 368 flow [2022-11-02 20:21:36,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:36,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:36,264 INFO L208 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] [2022-11-02 20:21:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:21:36,265 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1658319881, now seen corresponding path program 6 times [2022-11-02 20:21:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268867151] [2022-11-02 20:21:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:36,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268867151] [2022-11-02 20:21:36,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268867151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:21:36,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:21:36,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-02 20:21:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085583137] [2022-11-02 20:21:36,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:21:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:21:36,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:21:36,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:21:36,902 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 89 [2022-11-02 20:21:36,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 86 transitions, 368 flow. Second operand has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:36,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:36,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 89 [2022-11-02 20:21:36,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:37,395 INFO L130 PetriNetUnfolder]: 68/253 cut-off events. [2022-11-02 20:21:37,395 INFO L131 PetriNetUnfolder]: For 316/316 co-relation queries the response was YES. [2022-11-02 20:21:37,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 253 events. 68/253 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1027 event pairs, 38 based on Foata normal form. 1/249 useless extension candidates. Maximal degree in co-relation 618. Up to 105 conditions per place. [2022-11-02 20:21:37,399 INFO L137 encePairwiseOnDemand]: 77/89 looper letters, 34 selfloop transitions, 14 changer transitions 11/102 dead transitions. [2022-11-02 20:21:37,399 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 102 transitions, 547 flow [2022-11-02 20:21:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:21:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-02 20:21:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 690 transitions. [2022-11-02 20:21:37,404 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6460674157303371 [2022-11-02 20:21:37,405 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 690 transitions. [2022-11-02 20:21:37,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 690 transitions. [2022-11-02 20:21:37,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:37,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 690 transitions. [2022-11-02 20:21:37,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 57.5) internal successors, (690), 12 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:37,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:37,414 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 89.0) internal successors, (1157), 13 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:37,414 INFO L175 Difference]: Start difference. First operand has 114 places, 86 transitions, 368 flow. Second operand 12 states and 690 transitions. [2022-11-02 20:21:37,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 102 transitions, 547 flow [2022-11-02 20:21:37,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 499 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-02 20:21:37,427 INFO L231 Difference]: Finished difference. Result has 113 places, 85 transitions, 350 flow [2022-11-02 20:21:37,428 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=350, PETRI_PLACES=113, PETRI_TRANSITIONS=85} [2022-11-02 20:21:37,432 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 34 predicate places. [2022-11-02 20:21:37,432 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 85 transitions, 350 flow [2022-11-02 20:21:37,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 54.75) internal successors, (657), 12 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:37,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:37,433 INFO L208 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] [2022-11-02 20:21:37,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:21:37,434 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1302168853, now seen corresponding path program 1 times [2022-11-02 20:21:37,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:37,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666269213] [2022-11-02 20:21:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:38,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:38,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666269213] [2022-11-02 20:21:38,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666269213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:38,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167710026] [2022-11-02 20:21:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:38,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:38,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:38,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:21:38,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:21:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:39,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:40,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167710026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:40,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:40,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-02 20:21:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233457989] [2022-11-02 20:21:40,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:40,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:21:40,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:21:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:21:40,271 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:21:40,274 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 85 transitions, 350 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:40,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:40,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:21:40,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:43,651 INFO L130 PetriNetUnfolder]: 168/597 cut-off events. [2022-11-02 20:21:43,651 INFO L131 PetriNetUnfolder]: For 361/361 co-relation queries the response was YES. [2022-11-02 20:21:43,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 597 events. 168/597 cut-off events. For 361/361 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3309 event pairs, 9 based on Foata normal form. 13/610 useless extension candidates. Maximal degree in co-relation 1283. Up to 111 conditions per place. [2022-11-02 20:21:43,659 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 114 selfloop transitions, 82 changer transitions 13/251 dead transitions. [2022-11-02 20:21:43,659 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 251 transitions, 1334 flow [2022-11-02 20:21:43,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:21:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-02 20:21:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2702 transitions. [2022-11-02 20:21:43,672 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6324906367041199 [2022-11-02 20:21:43,672 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2702 transitions. [2022-11-02 20:21:43,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2702 transitions. [2022-11-02 20:21:43,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:43,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2702 transitions. [2022-11-02 20:21:43,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 56.291666666666664) internal successors, (2702), 48 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:43,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:43,701 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 89.0) internal successors, (4361), 49 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:43,701 INFO L175 Difference]: Start difference. First operand has 113 places, 85 transitions, 350 flow. Second operand 48 states and 2702 transitions. [2022-11-02 20:21:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 251 transitions, 1334 flow [2022-11-02 20:21:43,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 251 transitions, 1228 flow, removed 24 selfloop flow, removed 16 redundant places. [2022-11-02 20:21:43,712 INFO L231 Difference]: Finished difference. Result has 151 places, 152 transitions, 752 flow [2022-11-02 20:21:43,712 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=752, PETRI_PLACES=151, PETRI_TRANSITIONS=152} [2022-11-02 20:21:43,713 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 72 predicate places. [2022-11-02 20:21:43,713 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 152 transitions, 752 flow [2022-11-02 20:21:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:43,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:43,715 INFO L208 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] [2022-11-02 20:21:43,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:43,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:43,933 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1169578921, now seen corresponding path program 2 times [2022-11-02 20:21:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:43,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895967936] [2022-11-02 20:21:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:44,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895967936] [2022-11-02 20:21:44,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895967936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:44,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439801054] [2022-11-02 20:21:44,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:21:44,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:44,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:44,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:44,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:21:44,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:21:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:21:44,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:45,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439801054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:46,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:46,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-02 20:21:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697607514] [2022-11-02 20:21:46,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:46,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:21:46,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:46,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:21:46,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:21:46,796 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:21:46,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 152 transitions, 752 flow. Second operand has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:46,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:46,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:21:46,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:49,968 INFO L130 PetriNetUnfolder]: 210/768 cut-off events. [2022-11-02 20:21:49,969 INFO L131 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-11-02 20:21:49,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2123 conditions, 768 events. 210/768 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4737 event pairs, 23 based on Foata normal form. 2/768 useless extension candidates. Maximal degree in co-relation 2063. Up to 212 conditions per place. [2022-11-02 20:21:49,980 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 100 selfloop transitions, 126 changer transitions 12/280 dead transitions. [2022-11-02 20:21:49,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 280 transitions, 1864 flow [2022-11-02 20:21:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:21:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 20:21:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2561 transitions. [2022-11-02 20:21:49,990 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6255495847581827 [2022-11-02 20:21:49,990 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2561 transitions. [2022-11-02 20:21:49,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2561 transitions. [2022-11-02 20:21:49,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:49,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2561 transitions. [2022-11-02 20:21:50,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.67391304347826) internal successors, (2561), 46 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:50,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:50,023 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:50,024 INFO L175 Difference]: Start difference. First operand has 151 places, 152 transitions, 752 flow. Second operand 46 states and 2561 transitions. [2022-11-02 20:21:50,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 280 transitions, 1864 flow [2022-11-02 20:21:50,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 280 transitions, 1705 flow, removed 64 selfloop flow, removed 9 redundant places. [2022-11-02 20:21:50,043 INFO L231 Difference]: Finished difference. Result has 198 places, 209 transitions, 1337 flow [2022-11-02 20:21:50,044 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1337, PETRI_PLACES=198, PETRI_TRANSITIONS=209} [2022-11-02 20:21:50,048 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 119 predicate places. [2022-11-02 20:21:50,048 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 209 transitions, 1337 flow [2022-11-02 20:21:50,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.611111111111114) internal successors, (1930), 36 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:50,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:50,050 INFO L208 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] [2022-11-02 20:21:50,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:50,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1582509345, now seen corresponding path program 3 times [2022-11-02 20:21:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:50,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171014415] [2022-11-02 20:21:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:21:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:51,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:21:51,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171014415] [2022-11-02 20:21:51,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171014415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:21:51,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739871645] [2022-11-02 20:21:51,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:21:51,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:21:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:21:51,023 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:21:51,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:21:51,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:21:51,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:21:51,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:21:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:21:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:51,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:21:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:21:52,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739871645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:21:52,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:21:52,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-02 20:21:52,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397618860] [2022-11-02 20:21:52,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:21:52,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:21:52,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:21:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:21:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:21:52,722 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:21:52,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 209 transitions, 1337 flow. Second operand has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:52,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:21:52,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:21:52,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:21:59,543 INFO L130 PetriNetUnfolder]: 280/1041 cut-off events. [2022-11-02 20:21:59,544 INFO L131 PetriNetUnfolder]: For 1650/1652 co-relation queries the response was YES. [2022-11-02 20:21:59,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 1041 events. 280/1041 cut-off events. For 1650/1652 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7270 event pairs, 18 based on Foata normal form. 3/1032 useless extension candidates. Maximal degree in co-relation 3265. Up to 150 conditions per place. [2022-11-02 20:21:59,561 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 161 selfloop transitions, 209 changer transitions 6/418 dead transitions. [2022-11-02 20:21:59,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 418 transitions, 3301 flow [2022-11-02 20:21:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-02 20:21:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-02 20:21:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4518 transitions. [2022-11-02 20:21:59,576 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6267166042446941 [2022-11-02 20:21:59,577 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4518 transitions. [2022-11-02 20:21:59,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4518 transitions. [2022-11-02 20:21:59,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:21:59,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4518 transitions. [2022-11-02 20:21:59,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.77777777777778) internal successors, (4518), 81 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:59,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:59,624 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:59,633 INFO L175 Difference]: Start difference. First operand has 198 places, 209 transitions, 1337 flow. Second operand 81 states and 4518 transitions. [2022-11-02 20:21:59,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 418 transitions, 3301 flow [2022-11-02 20:21:59,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 418 transitions, 3198 flow, removed 45 selfloop flow, removed 11 redundant places. [2022-11-02 20:21:59,670 INFO L231 Difference]: Finished difference. Result has 277 places, 290 transitions, 2421 flow [2022-11-02 20:21:59,671 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=2421, PETRI_PLACES=277, PETRI_TRANSITIONS=290} [2022-11-02 20:21:59,672 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 198 predicate places. [2022-11-02 20:21:59,672 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 290 transitions, 2421 flow [2022-11-02 20:21:59,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.68571428571428) internal successors, (1879), 35 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:21:59,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:21:59,674 INFO L208 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] [2022-11-02 20:21:59,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:21:59,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:21:59,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:21:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:21:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1969431893, now seen corresponding path program 4 times [2022-11-02 20:21:59,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:21:59,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128328410] [2022-11-02 20:21:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:21:59,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:21:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:00,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:00,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128328410] [2022-11-02 20:22:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128328410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:00,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514345751] [2022-11-02 20:22:00,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:22:00,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:00,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:00,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:22:00,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:22:00,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:00,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:01,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:02,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514345751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:02,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:02,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-02 20:22:02,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037698216] [2022-11-02 20:22:02,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:02,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:22:02,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:02,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:22:02,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:22:02,515 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:02,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 290 transitions, 2421 flow. Second operand has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:02,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:02,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:02,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:12,402 INFO L130 PetriNetUnfolder]: 526/1853 cut-off events. [2022-11-02 20:22:12,403 INFO L131 PetriNetUnfolder]: For 8908/8910 co-relation queries the response was YES. [2022-11-02 20:22:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7672 conditions, 1853 events. 526/1853 cut-off events. For 8908/8910 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15017 event pairs, 7 based on Foata normal form. 5/1841 useless extension candidates. Maximal degree in co-relation 7501. Up to 212 conditions per place. [2022-11-02 20:22:12,433 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 234 selfloop transitions, 416 changer transitions 15/707 dead transitions. [2022-11-02 20:22:12,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 707 transitions, 7424 flow [2022-11-02 20:22:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-02 20:22:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2022-11-02 20:22:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 6273 transitions. [2022-11-02 20:22:12,462 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6293138041733547 [2022-11-02 20:22:12,463 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 6273 transitions. [2022-11-02 20:22:12,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 6273 transitions. [2022-11-02 20:22:12,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:12,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 6273 transitions. [2022-11-02 20:22:12,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 56.00892857142857) internal successors, (6273), 112 states have internal predecessors, (6273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:12,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:12,517 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 89.0) internal successors, (10057), 113 states have internal predecessors, (10057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:12,518 INFO L175 Difference]: Start difference. First operand has 277 places, 290 transitions, 2421 flow. Second operand 112 states and 6273 transitions. [2022-11-02 20:22:12,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 707 transitions, 7424 flow [2022-11-02 20:22:12,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 707 transitions, 7063 flow, removed 104 selfloop flow, removed 19 redundant places. [2022-11-02 20:22:12,607 INFO L231 Difference]: Finished difference. Result has 392 places, 525 transitions, 5581 flow [2022-11-02 20:22:12,609 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2160, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=112, PETRI_FLOW=5581, PETRI_PLACES=392, PETRI_TRANSITIONS=525} [2022-11-02 20:22:12,610 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 313 predicate places. [2022-11-02 20:22:12,611 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 525 transitions, 5581 flow [2022-11-02 20:22:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.666666666666664) internal successors, (1932), 36 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:12,612 INFO L208 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] [2022-11-02 20:22:12,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:22:12,839 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1783481591, now seen corresponding path program 5 times [2022-11-02 20:22:12,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:12,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938431125] [2022-11-02 20:22:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938431125] [2022-11-02 20:22:13,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938431125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:13,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305719483] [2022-11-02 20:22:13,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:22:13,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:13,427 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:13,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:22:13,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:14,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:15,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:15,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305719483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:15,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:15,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-02 20:22:15,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461110263] [2022-11-02 20:22:15,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:22:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:15,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:22:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:22:15,340 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:15,342 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 525 transitions, 5581 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:15,342 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:15,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:15,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:19,113 INFO L130 PetriNetUnfolder]: 666/2246 cut-off events. [2022-11-02 20:22:19,114 INFO L131 PetriNetUnfolder]: For 22730/22730 co-relation queries the response was YES. [2022-11-02 20:22:19,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11540 conditions, 2246 events. 666/2246 cut-off events. For 22730/22730 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18896 event pairs, 35 based on Foata normal form. 2/2236 useless extension candidates. Maximal degree in co-relation 11410. Up to 671 conditions per place. [2022-11-02 20:22:19,161 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 289 selfloop transitions, 386 changer transitions 12/729 dead transitions. [2022-11-02 20:22:19,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 729 transitions, 9363 flow [2022-11-02 20:22:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-02 20:22:19,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-02 20:22:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2560 transitions. [2022-11-02 20:22:19,169 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.625305324865657 [2022-11-02 20:22:19,169 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2560 transitions. [2022-11-02 20:22:19,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2560 transitions. [2022-11-02 20:22:19,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:19,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2560 transitions. [2022-11-02 20:22:19,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 55.65217391304348) internal successors, (2560), 46 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:19,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:19,190 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 89.0) internal successors, (4183), 47 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:19,190 INFO L175 Difference]: Start difference. First operand has 392 places, 525 transitions, 5581 flow. Second operand 46 states and 2560 transitions. [2022-11-02 20:22:19,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 729 transitions, 9363 flow [2022-11-02 20:22:19,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 729 transitions, 7971 flow, removed 565 selfloop flow, removed 27 redundant places. [2022-11-02 20:22:19,446 INFO L231 Difference]: Finished difference. Result has 419 places, 627 transitions, 7200 flow [2022-11-02 20:22:19,447 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7200, PETRI_PLACES=419, PETRI_TRANSITIONS=627} [2022-11-02 20:22:19,448 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 340 predicate places. [2022-11-02 20:22:19,448 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 627 transitions, 7200 flow [2022-11-02 20:22:19,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:19,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:19,450 INFO L208 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] [2022-11-02 20:22:19,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:19,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 20:22:19,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2018478581, now seen corresponding path program 6 times [2022-11-02 20:22:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:19,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433845030] [2022-11-02 20:22:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:20,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433845030] [2022-11-02 20:22:20,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433845030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:20,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906010382] [2022-11-02 20:22:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:22:20,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:20,354 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:20,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:22:20,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:22:20,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:20,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:21,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:21,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906010382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:21,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:21,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-02 20:22:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144257964] [2022-11-02 20:22:21,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:22:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:21,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:22:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:22:21,944 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:21,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 627 transitions, 7200 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:21,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:21,948 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:21,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:24,169 INFO L130 PetriNetUnfolder]: 667/2241 cut-off events. [2022-11-02 20:22:24,170 INFO L131 PetriNetUnfolder]: For 22000/22000 co-relation queries the response was YES. [2022-11-02 20:22:24,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11383 conditions, 2241 events. 667/2241 cut-off events. For 22000/22000 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 18855 event pairs, 53 based on Foata normal form. 1/2226 useless extension candidates. Maximal degree in co-relation 11292. Up to 894 conditions per place. [2022-11-02 20:22:24,233 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 254 selfloop transitions, 367 changer transitions 6/669 dead transitions. [2022-11-02 20:22:24,233 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 669 transitions, 8867 flow [2022-11-02 20:22:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:22:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-02 20:22:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1452 transitions. [2022-11-02 20:22:24,238 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6274848746758859 [2022-11-02 20:22:24,238 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1452 transitions. [2022-11-02 20:22:24,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1452 transitions. [2022-11-02 20:22:24,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:24,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1452 transitions. [2022-11-02 20:22:24,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 55.84615384615385) internal successors, (1452), 26 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:24,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:24,248 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 89.0) internal successors, (2403), 27 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:24,249 INFO L175 Difference]: Start difference. First operand has 419 places, 627 transitions, 7200 flow. Second operand 26 states and 1452 transitions. [2022-11-02 20:22:24,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 669 transitions, 8867 flow [2022-11-02 20:22:24,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 669 transitions, 8708 flow, removed 54 selfloop flow, removed 15 redundant places. [2022-11-02 20:22:24,528 INFO L231 Difference]: Finished difference. Result has 429 places, 632 transitions, 8152 flow [2022-11-02 20:22:24,528 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=362, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=8152, PETRI_PLACES=429, PETRI_TRANSITIONS=632} [2022-11-02 20:22:24,529 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 350 predicate places. [2022-11-02 20:22:24,529 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 632 transitions, 8152 flow [2022-11-02 20:22:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:24,531 INFO L208 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] [2022-11-02 20:22:24,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-02 20:22:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:22:24,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -295032361, now seen corresponding path program 7 times [2022-11-02 20:22:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:24,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464058076] [2022-11-02 20:22:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:24,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464058076] [2022-11-02 20:22:25,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464058076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:25,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253566497] [2022-11-02 20:22:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:22:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:25,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:25,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:25,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:22:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:25,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:25,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:26,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:27,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253566497] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:27,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:27,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-02 20:22:27,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734300775] [2022-11-02 20:22:27,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:27,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:22:27,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:27,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:22:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:22:27,102 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:27,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 632 transitions, 8152 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:27,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:27,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:27,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:33,636 INFO L130 PetriNetUnfolder]: 774/2553 cut-off events. [2022-11-02 20:22:33,636 INFO L131 PetriNetUnfolder]: For 25286/25286 co-relation queries the response was YES. [2022-11-02 20:22:33,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13878 conditions, 2553 events. 774/2553 cut-off events. For 25286/25286 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 22006 event pairs, 39 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 13787. Up to 692 conditions per place. [2022-11-02 20:22:33,694 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 247 selfloop transitions, 591 changer transitions 6/886 dead transitions. [2022-11-02 20:22:33,694 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 886 transitions, 12826 flow [2022-11-02 20:22:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-02 20:22:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2022-11-02 20:22:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 3882 transitions. [2022-11-02 20:22:33,702 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6231139646869984 [2022-11-02 20:22:33,702 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 3882 transitions. [2022-11-02 20:22:33,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 3882 transitions. [2022-11-02 20:22:33,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:33,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 3882 transitions. [2022-11-02 20:22:33,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 55.457142857142856) internal successors, (3882), 70 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:33,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:33,726 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 89.0) internal successors, (6319), 71 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:33,726 INFO L175 Difference]: Start difference. First operand has 429 places, 632 transitions, 8152 flow. Second operand 70 states and 3882 transitions. [2022-11-02 20:22:33,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 886 transitions, 12826 flow [2022-11-02 20:22:33,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 886 transitions, 12405 flow, removed 11 selfloop flow, removed 19 redundant places. [2022-11-02 20:22:33,967 INFO L231 Difference]: Finished difference. Result has 491 places, 799 transitions, 12001 flow [2022-11-02 20:22:33,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=436, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=12001, PETRI_PLACES=491, PETRI_TRANSITIONS=799} [2022-11-02 20:22:33,969 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 412 predicate places. [2022-11-02 20:22:33,969 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 799 transitions, 12001 flow [2022-11-02 20:22:33,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:33,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:33,971 INFO L208 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] [2022-11-02 20:22:34,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:34,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:34,172 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:34,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1938319585, now seen corresponding path program 8 times [2022-11-02 20:22:34,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:34,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381074954] [2022-11-02 20:22:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:34,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381074954] [2022-11-02 20:22:34,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381074954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:34,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467198843] [2022-11-02 20:22:34,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:22:34,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:34,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:34,855 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:34,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:22:34,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:22:34,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:34,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:34,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:35,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:36,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467198843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:36,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:36,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2022-11-02 20:22:36,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684657846] [2022-11-02 20:22:36,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:36,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:22:36,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:22:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:22:36,448 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:36,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 799 transitions, 12001 flow. Second operand has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:36,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:36,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:36,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:44,733 INFO L130 PetriNetUnfolder]: 884/2950 cut-off events. [2022-11-02 20:22:44,733 INFO L131 PetriNetUnfolder]: For 36913/36913 co-relation queries the response was YES. [2022-11-02 20:22:44,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17495 conditions, 2950 events. 884/2950 cut-off events. For 36913/36913 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26740 event pairs, 30 based on Foata normal form. 2/2930 useless extension candidates. Maximal degree in co-relation 17392. Up to 668 conditions per place. [2022-11-02 20:22:44,799 INFO L137 encePairwiseOnDemand]: 68/89 looper letters, 247 selfloop transitions, 691 changer transitions 12/992 dead transitions. [2022-11-02 20:22:44,800 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 992 transitions, 16293 flow [2022-11-02 20:22:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-02 20:22:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2022-11-02 20:22:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 4770 transitions. [2022-11-02 20:22:44,808 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6232035536974131 [2022-11-02 20:22:44,809 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 4770 transitions. [2022-11-02 20:22:44,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 4770 transitions. [2022-11-02 20:22:44,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:44,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 4770 transitions. [2022-11-02 20:22:44,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 55.46511627906977) internal successors, (4770), 86 states have internal predecessors, (4770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:44,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:44,834 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 89.0) internal successors, (7743), 87 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:44,834 INFO L175 Difference]: Start difference. First operand has 491 places, 799 transitions, 12001 flow. Second operand 86 states and 4770 transitions. [2022-11-02 20:22:44,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 992 transitions, 16293 flow [2022-11-02 20:22:45,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 992 transitions, 15798 flow, removed 130 selfloop flow, removed 25 redundant places. [2022-11-02 20:22:45,530 INFO L231 Difference]: Finished difference. Result has 560 places, 895 transitions, 14867 flow [2022-11-02 20:22:45,531 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=11532, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=603, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=14867, PETRI_PLACES=560, PETRI_TRANSITIONS=895} [2022-11-02 20:22:45,532 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 481 predicate places. [2022-11-02 20:22:45,532 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 895 transitions, 14867 flow [2022-11-02 20:22:45,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 53.65714285714286) internal successors, (1878), 35 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:45,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:45,534 INFO L208 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] [2022-11-02 20:22:45,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 20:22:45,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:45,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1863812427, now seen corresponding path program 9 times [2022-11-02 20:22:45,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:45,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151025078] [2022-11-02 20:22:45,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:45,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:46,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:46,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151025078] [2022-11-02 20:22:46,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151025078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:46,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753876400] [2022-11-02 20:22:46,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:22:46,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:46,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:46,310 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:46,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:22:46,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:22:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:47,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753876400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:48,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:48,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:22:48,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545284240] [2022-11-02 20:22:48,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:48,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:22:48,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:48,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:22:48,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:22:48,280 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:48,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 895 transitions, 14867 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:48,284 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:48,284 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:48,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:22:53,514 INFO L130 PetriNetUnfolder]: 927/3371 cut-off events. [2022-11-02 20:22:53,515 INFO L131 PetriNetUnfolder]: For 50970/50970 co-relation queries the response was YES. [2022-11-02 20:22:53,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20761 conditions, 3371 events. 927/3371 cut-off events. For 50970/50970 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 32390 event pairs, 52 based on Foata normal form. 1/3361 useless extension candidates. Maximal degree in co-relation 20647. Up to 911 conditions per place. [2022-11-02 20:22:53,570 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 403 selfloop transitions, 580 changer transitions 6/1031 dead transitions. [2022-11-02 20:22:53,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1031 transitions, 18554 flow [2022-11-02 20:22:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-02 20:22:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-02 20:22:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2624 transitions. [2022-11-02 20:22:53,576 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6273009801577815 [2022-11-02 20:22:53,576 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2624 transitions. [2022-11-02 20:22:53,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2624 transitions. [2022-11-02 20:22:53,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:22:53,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2624 transitions. [2022-11-02 20:22:53,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 55.829787234042556) internal successors, (2624), 47 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:53,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 89.0) internal successors, (4272), 48 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:53,590 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 89.0) internal successors, (4272), 48 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:53,591 INFO L175 Difference]: Start difference. First operand has 560 places, 895 transitions, 14867 flow. Second operand 47 states and 2624 transitions. [2022-11-02 20:22:53,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1031 transitions, 18554 flow [2022-11-02 20:22:54,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1031 transitions, 17280 flow, removed 215 selfloop flow, removed 63 redundant places. [2022-11-02 20:22:54,335 INFO L231 Difference]: Finished difference. Result has 547 places, 945 transitions, 15834 flow [2022-11-02 20:22:54,337 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=13682, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=15834, PETRI_PLACES=547, PETRI_TRANSITIONS=945} [2022-11-02 20:22:54,338 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 468 predicate places. [2022-11-02 20:22:54,338 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 945 transitions, 15834 flow [2022-11-02 20:22:54,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:54,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:22:54,339 INFO L208 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] [2022-11-02 20:22:54,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:22:54,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:54,544 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:22:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:22:54,544 INFO L85 PathProgramCache]: Analyzing trace with hash -998248241, now seen corresponding path program 10 times [2022-11-02 20:22:54,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:22:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654881238] [2022-11-02 20:22:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:22:54,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:22:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:22:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:22:55,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654881238] [2022-11-02 20:22:55,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654881238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:22:55,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120434517] [2022-11-02 20:22:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:22:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:22:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:22:55,197 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:22:55,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:22:55,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:22:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:22:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:22:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:22:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:56,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:22:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:22:56,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120434517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:22:56,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:22:56,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2022-11-02 20:22:56,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749546708] [2022-11-02 20:22:56,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:22:56,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:22:56,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:22:56,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:22:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:22:56,810 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:22:56,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 945 transitions, 15834 flow. Second operand has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:22:56,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:22:56,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:22:56,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:00,738 INFO L130 PetriNetUnfolder]: 927/3363 cut-off events. [2022-11-02 20:23:00,738 INFO L131 PetriNetUnfolder]: For 48671/48671 co-relation queries the response was YES. [2022-11-02 20:23:00,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20614 conditions, 3363 events. 927/3363 cut-off events. For 48671/48671 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 32334 event pairs, 69 based on Foata normal form. 1/3358 useless extension candidates. Maximal degree in co-relation 20503. Up to 1246 conditions per place. [2022-11-02 20:23:00,795 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 381 selfloop transitions, 556 changer transitions 6/985 dead transitions. [2022-11-02 20:23:00,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 985 transitions, 18172 flow [2022-11-02 20:23:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:23:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-02 20:23:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1783 transitions. [2022-11-02 20:23:00,799 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6260533707865169 [2022-11-02 20:23:00,800 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1783 transitions. [2022-11-02 20:23:00,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1783 transitions. [2022-11-02 20:23:00,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:00,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1783 transitions. [2022-11-02 20:23:00,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 55.71875) internal successors, (1783), 32 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:00,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:00,810 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 89.0) internal successors, (2937), 33 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:00,810 INFO L175 Difference]: Start difference. First operand has 547 places, 945 transitions, 15834 flow. Second operand 32 states and 1783 transitions. [2022-11-02 20:23:00,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 985 transitions, 18172 flow [2022-11-02 20:23:01,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 985 transitions, 17874 flow, removed 49 selfloop flow, removed 23 redundant places. [2022-11-02 20:23:01,432 INFO L231 Difference]: Finished difference. Result has 558 places, 951 transitions, 17206 flow [2022-11-02 20:23:01,433 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=15541, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=17206, PETRI_PLACES=558, PETRI_TRANSITIONS=951} [2022-11-02 20:23:01,434 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 479 predicate places. [2022-11-02 20:23:01,434 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 951 transitions, 17206 flow [2022-11-02 20:23:01,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 53.638888888888886) internal successors, (1931), 36 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:01,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:01,435 INFO L208 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] [2022-11-02 20:23:01,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-02 20:23:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:23:01,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1256135503, now seen corresponding path program 11 times [2022-11-02 20:23:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924766467] [2022-11-02 20:23:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:02,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924766467] [2022-11-02 20:23:02,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924766467] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:02,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142839148] [2022-11-02 20:23:02,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:23:02,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:02,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:02,282 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:02,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:23:02,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:23:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:03,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:03,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142839148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:03,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:03,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:03,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058002057] [2022-11-02 20:23:03,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:03,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:03,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1104, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:03,978 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:03,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 951 transitions, 17206 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:03,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:03,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:03,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:07,709 INFO L130 PetriNetUnfolder]: 927/3394 cut-off events. [2022-11-02 20:23:07,710 INFO L131 PetriNetUnfolder]: For 53074/53074 co-relation queries the response was YES. [2022-11-02 20:23:07,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21698 conditions, 3394 events. 927/3394 cut-off events. For 53074/53074 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 32791 event pairs, 103 based on Foata normal form. 2/3373 useless extension candidates. Maximal degree in co-relation 21585. Up to 1258 conditions per place. [2022-11-02 20:23:07,786 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 418 selfloop transitions, 520 changer transitions 12/992 dead transitions. [2022-11-02 20:23:07,786 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 992 transitions, 19607 flow [2022-11-02 20:23:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:23:07,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-02 20:23:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1878 transitions. [2022-11-02 20:23:07,792 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6206212822207535 [2022-11-02 20:23:07,792 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1878 transitions. [2022-11-02 20:23:07,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1878 transitions. [2022-11-02 20:23:07,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:07,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1878 transitions. [2022-11-02 20:23:07,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 55.23529411764706) internal successors, (1878), 34 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,884 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 89.0) internal successors, (3115), 35 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:07,884 INFO L175 Difference]: Start difference. First operand has 558 places, 951 transitions, 17206 flow. Second operand 34 states and 1878 transitions. [2022-11-02 20:23:07,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 992 transitions, 19607 flow [2022-11-02 20:23:08,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 992 transitions, 19466 flow, removed 8 selfloop flow, removed 22 redundant places. [2022-11-02 20:23:08,616 INFO L231 Difference]: Finished difference. Result has 579 places, 960 transitions, 18742 flow [2022-11-02 20:23:08,618 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17069, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=951, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=511, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=18742, PETRI_PLACES=579, PETRI_TRANSITIONS=960} [2022-11-02 20:23:08,619 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 500 predicate places. [2022-11-02 20:23:08,619 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 960 transitions, 18742 flow [2022-11-02 20:23:08,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:08,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:08,620 INFO L208 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] [2022-11-02 20:23:08,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:08,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:23:08,835 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 400076447, now seen corresponding path program 12 times [2022-11-02 20:23:08,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:08,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673888241] [2022-11-02 20:23:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:08,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:09,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:09,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673888241] [2022-11-02 20:23:09,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673888241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:09,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273962260] [2022-11-02 20:23:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:23:09,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:09,354 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:09,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:23:09,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:23:09,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:09,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:10,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:11,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273962260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:11,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:11,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:11,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82020984] [2022-11-02 20:23:11,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:11,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:11,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:11,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:11,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:11,185 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:11,187 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 960 transitions, 18742 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:11,187 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:11,187 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:11,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:19,617 INFO L130 PetriNetUnfolder]: 1007/3696 cut-off events. [2022-11-02 20:23:19,618 INFO L131 PetriNetUnfolder]: For 65035/65035 co-relation queries the response was YES. [2022-11-02 20:23:19,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24912 conditions, 3696 events. 1007/3696 cut-off events. For 65035/65035 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 36510 event pairs, 57 based on Foata normal form. 2/3693 useless extension candidates. Maximal degree in co-relation 24798. Up to 882 conditions per place. [2022-11-02 20:23:19,709 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 296 selfloop transitions, 796 changer transitions 12/1146 dead transitions. [2022-11-02 20:23:19,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 1146 transitions, 23786 flow [2022-11-02 20:23:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-02 20:23:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2022-11-02 20:23:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 4484 transitions. [2022-11-02 20:23:19,802 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6220002774309891 [2022-11-02 20:23:19,802 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 4484 transitions. [2022-11-02 20:23:19,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 4484 transitions. [2022-11-02 20:23:19,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:19,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 4484 transitions. [2022-11-02 20:23:19,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 55.358024691358025) internal successors, (4484), 81 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:19,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:19,823 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 89.0) internal successors, (7298), 82 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:19,823 INFO L175 Difference]: Start difference. First operand has 579 places, 960 transitions, 18742 flow. Second operand 81 states and 4484 transitions. [2022-11-02 20:23:19,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 1146 transitions, 23786 flow [2022-11-02 20:23:20,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1146 transitions, 23250 flow, removed 33 selfloop flow, removed 22 redundant places. [2022-11-02 20:23:20,601 INFO L231 Difference]: Finished difference. Result has 642 places, 1050 transitions, 22481 flow [2022-11-02 20:23:20,603 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=18264, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=708, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=22481, PETRI_PLACES=642, PETRI_TRANSITIONS=1050} [2022-11-02 20:23:20,603 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 563 predicate places. [2022-11-02 20:23:20,603 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 1050 transitions, 22481 flow [2022-11-02 20:23:20,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:20,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:20,604 INFO L208 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] [2022-11-02 20:23:20,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:23:20,831 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash 640870005, now seen corresponding path program 13 times [2022-11-02 20:23:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:20,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854127910] [2022-11-02 20:23:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:21,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854127910] [2022-11-02 20:23:21,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854127910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:21,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815821888] [2022-11-02 20:23:21,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:23:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:21,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:21,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:23:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:22,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:22,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815821888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:22,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:22,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:22,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106492653] [2022-11-02 20:23:22,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:22,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:22,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:22,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:22,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:22,944 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:22,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 1050 transitions, 22481 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:22,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:22,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:26,856 INFO L130 PetriNetUnfolder]: 1007/3695 cut-off events. [2022-11-02 20:23:26,856 INFO L131 PetriNetUnfolder]: For 81709/81709 co-relation queries the response was YES. [2022-11-02 20:23:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27025 conditions, 3695 events. 1007/3695 cut-off events. For 81709/81709 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36503 event pairs, 117 based on Foata normal form. 2/3675 useless extension candidates. Maximal degree in co-relation 26905. Up to 1334 conditions per place. [2022-11-02 20:23:26,926 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 457 selfloop transitions, 584 changer transitions 12/1095 dead transitions. [2022-11-02 20:23:26,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 1095 transitions, 25153 flow [2022-11-02 20:23:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:23:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:23:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1820 transitions. [2022-11-02 20:23:26,928 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6196799455226422 [2022-11-02 20:23:26,928 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1820 transitions. [2022-11-02 20:23:26,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1820 transitions. [2022-11-02 20:23:26,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:26,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1820 transitions. [2022-11-02 20:23:26,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.15151515151515) internal successors, (1820), 33 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:26,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:26,938 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:26,938 INFO L175 Difference]: Start difference. First operand has 642 places, 1050 transitions, 22481 flow. Second operand 33 states and 1820 transitions. [2022-11-02 20:23:26,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 1095 transitions, 25153 flow [2022-11-02 20:23:27,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 1095 transitions, 24332 flow, removed 137 selfloop flow, removed 42 redundant places. [2022-11-02 20:23:27,830 INFO L231 Difference]: Finished difference. Result has 637 places, 1063 transitions, 23534 flow [2022-11-02 20:23:27,831 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=21689, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1050, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=23534, PETRI_PLACES=637, PETRI_TRANSITIONS=1063} [2022-11-02 20:23:27,832 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 558 predicate places. [2022-11-02 20:23:27,832 INFO L495 AbstractCegarLoop]: Abstraction has has 637 places, 1063 transitions, 23534 flow [2022-11-02 20:23:27,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:27,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:27,833 INFO L208 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] [2022-11-02 20:23:27,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-02 20:23:28,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:28,034 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:28,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:28,034 INFO L85 PathProgramCache]: Analyzing trace with hash -534739235, now seen corresponding path program 14 times [2022-11-02 20:23:28,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:28,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602980243] [2022-11-02 20:23:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:28,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:28,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602980243] [2022-11-02 20:23:28,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602980243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521458734] [2022-11-02 20:23:28,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:23:28,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:28,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:28,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:28,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:23:28,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:23:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:28,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:29,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:30,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521458734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:30,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:30,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:30,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267594883] [2022-11-02 20:23:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:30,351 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:30,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 637 places, 1063 transitions, 23534 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:30,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:30,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:30,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:34,636 INFO L130 PetriNetUnfolder]: 1008/3714 cut-off events. [2022-11-02 20:23:34,636 INFO L131 PetriNetUnfolder]: For 88675/88675 co-relation queries the response was YES. [2022-11-02 20:23:34,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 3714 events. 1008/3714 cut-off events. For 88675/88675 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36865 event pairs, 111 based on Foata normal form. 2/3693 useless extension candidates. Maximal degree in co-relation 27799. Up to 1342 conditions per place. [2022-11-02 20:23:34,705 INFO L137 encePairwiseOnDemand]: 69/89 looper letters, 444 selfloop transitions, 607 changer transitions 12/1105 dead transitions. [2022-11-02 20:23:34,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 1105 transitions, 26242 flow [2022-11-02 20:23:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:23:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-02 20:23:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2041 transitions. [2022-11-02 20:23:34,708 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6197995748557547 [2022-11-02 20:23:34,709 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2041 transitions. [2022-11-02 20:23:34,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2041 transitions. [2022-11-02 20:23:34,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:34,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2041 transitions. [2022-11-02 20:23:34,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 55.16216216216216) internal successors, (2041), 37 states have internal predecessors, (2041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:34,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:34,719 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 89.0) internal successors, (3382), 38 states have internal predecessors, (3382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:34,719 INFO L175 Difference]: Start difference. First operand has 637 places, 1063 transitions, 23534 flow. Second operand 37 states and 2041 transitions. [2022-11-02 20:23:34,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 1105 transitions, 26242 flow [2022-11-02 20:23:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 651 places, 1105 transitions, 26014 flow, removed 26 selfloop flow, removed 16 redundant places. [2022-11-02 20:23:35,793 INFO L231 Difference]: Finished difference. Result has 664 places, 1073 transitions, 25242 flow [2022-11-02 20:23:35,794 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=23323, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=25242, PETRI_PLACES=664, PETRI_TRANSITIONS=1073} [2022-11-02 20:23:35,795 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 585 predicate places. [2022-11-02 20:23:35,795 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1073 transitions, 25242 flow [2022-11-02 20:23:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:35,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:35,796 INFO L208 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] [2022-11-02 20:23:35,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:36,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:36,023 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:36,024 INFO L85 PathProgramCache]: Analyzing trace with hash 564448207, now seen corresponding path program 15 times [2022-11-02 20:23:36,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346851775] [2022-11-02 20:23:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:36,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:36,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346851775] [2022-11-02 20:23:36,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346851775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300861500] [2022-11-02 20:23:36,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:23:36,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:36,562 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:36,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:23:36,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 20:23:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:37,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:38,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300861500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:38,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:38,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:38,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728759602] [2022-11-02 20:23:38,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:38,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:38,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1112, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:38,270 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:38,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1073 transitions, 25242 flow. Second operand has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:38,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:38,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:38,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:42,832 INFO L130 PetriNetUnfolder]: 1010/3759 cut-off events. [2022-11-02 20:23:42,833 INFO L131 PetriNetUnfolder]: For 100739/100739 co-relation queries the response was YES. [2022-11-02 20:23:42,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29164 conditions, 3759 events. 1010/3759 cut-off events. For 100739/100739 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37440 event pairs, 82 based on Foata normal form. 1/3755 useless extension candidates. Maximal degree in co-relation 29029. Up to 1574 conditions per place. [2022-11-02 20:23:42,919 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 435 selfloop transitions, 624 changer transitions 6/1107 dead transitions. [2022-11-02 20:23:42,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1107 transitions, 27864 flow [2022-11-02 20:23:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:23:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-02 20:23:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1827 transitions. [2022-11-02 20:23:42,924 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6220633299284984 [2022-11-02 20:23:42,924 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1827 transitions. [2022-11-02 20:23:42,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1827 transitions. [2022-11-02 20:23:42,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:42,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1827 transitions. [2022-11-02 20:23:42,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 55.36363636363637) internal successors, (1827), 33 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:42,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:42,936 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 89.0) internal successors, (3026), 34 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:42,936 INFO L175 Difference]: Start difference. First operand has 664 places, 1073 transitions, 25242 flow. Second operand 33 states and 1827 transitions. [2022-11-02 20:23:42,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1107 transitions, 27864 flow [2022-11-02 20:23:43,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 666 places, 1107 transitions, 26957 flow, removed 30 selfloop flow, removed 24 redundant places. [2022-11-02 20:23:44,052 INFO L231 Difference]: Finished difference. Result has 672 places, 1081 transitions, 25912 flow [2022-11-02 20:23:44,053 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=24348, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=25912, PETRI_PLACES=672, PETRI_TRANSITIONS=1081} [2022-11-02 20:23:44,054 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 593 predicate places. [2022-11-02 20:23:44,054 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1081 transitions, 25912 flow [2022-11-02 20:23:44,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.5945945945946) internal successors, (1983), 37 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:44,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:44,058 INFO L208 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] [2022-11-02 20:23:44,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:44,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:44,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:44,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1899819553, now seen corresponding path program 16 times [2022-11-02 20:23:44,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:44,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522208707] [2022-11-02 20:23:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:44,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:44,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522208707] [2022-11-02 20:23:44,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522208707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:44,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78660821] [2022-11-02 20:23:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:23:44,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:44,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:44,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:23:45,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:23:45,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:45,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:45,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:46,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78660821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:46,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:46,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139568918] [2022-11-02 20:23:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:46,618 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:46,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1081 transitions, 25912 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:46,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:46,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:23:52,158 INFO L130 PetriNetUnfolder]: 1010/3755 cut-off events. [2022-11-02 20:23:52,158 INFO L131 PetriNetUnfolder]: For 104254/104254 co-relation queries the response was YES. [2022-11-02 20:23:52,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29656 conditions, 3755 events. 1010/3755 cut-off events. For 104254/104254 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 37298 event pairs, 55 based on Foata normal form. 1/3753 useless extension candidates. Maximal degree in co-relation 29520. Up to 1240 conditions per place. [2022-11-02 20:23:52,228 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 412 selfloop transitions, 709 changer transitions 6/1169 dead transitions. [2022-11-02 20:23:52,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 1169 transitions, 29358 flow [2022-11-02 20:23:52,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-02 20:23:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-02 20:23:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2789 transitions. [2022-11-02 20:23:52,233 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6267415730337078 [2022-11-02 20:23:52,234 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2789 transitions. [2022-11-02 20:23:52,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2789 transitions. [2022-11-02 20:23:52,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:23:52,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2789 transitions. [2022-11-02 20:23:52,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 55.78) internal successors, (2789), 50 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:52,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:52,247 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 89.0) internal successors, (4539), 51 states have internal predecessors, (4539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:52,247 INFO L175 Difference]: Start difference. First operand has 672 places, 1081 transitions, 25912 flow. Second operand 50 states and 2789 transitions. [2022-11-02 20:23:52,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 1169 transitions, 29358 flow [2022-11-02 20:23:53,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 1169 transitions, 28907 flow, removed 27 selfloop flow, removed 23 redundant places. [2022-11-02 20:23:53,348 INFO L231 Difference]: Finished difference. Result has 704 places, 1103 transitions, 27938 flow [2022-11-02 20:23:53,350 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=25469, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=27938, PETRI_PLACES=704, PETRI_TRANSITIONS=1103} [2022-11-02 20:23:53,351 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 625 predicate places. [2022-11-02 20:23:53,351 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 1103 transitions, 27938 flow [2022-11-02 20:23:53,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:53,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:23:53,352 INFO L208 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] [2022-11-02 20:23:53,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:23:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:53,579 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:23:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:23:53,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1897700171, now seen corresponding path program 17 times [2022-11-02 20:23:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:23:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494192628] [2022-11-02 20:23:53,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:23:53,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:23:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:23:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:54,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:23:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494192628] [2022-11-02 20:23:54,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494192628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:23:54,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917533006] [2022-11-02 20:23:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:23:54,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:23:54,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:23:54,246 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:23:54,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:23:54,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:23:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:23:54,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:23:54,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:23:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:55,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:23:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:23:55,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917533006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:23:55,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:23:55,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:23:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303971275] [2022-11-02 20:23:55,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:23:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:23:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:23:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:23:55,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:23:55,997 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:23:55,999 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1103 transitions, 27938 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:23:56,000 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:23:56,000 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:23:56,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:24:04,615 INFO L130 PetriNetUnfolder]: 1052/3907 cut-off events. [2022-11-02 20:24:04,615 INFO L131 PetriNetUnfolder]: For 123807/123807 co-relation queries the response was YES. [2022-11-02 20:24:04,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32193 conditions, 3907 events. 1052/3907 cut-off events. For 123807/123807 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39197 event pairs, 64 based on Foata normal form. 1/3905 useless extension candidates. Maximal degree in co-relation 32051. Up to 1209 conditions per place. [2022-11-02 20:24:04,693 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 334 selfloop transitions, 843 changer transitions 6/1225 dead transitions. [2022-11-02 20:24:04,693 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 1225 transitions, 32223 flow [2022-11-02 20:24:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-02 20:24:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2022-11-02 20:24:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4251 transitions. [2022-11-02 20:24:04,699 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6203122719976653 [2022-11-02 20:24:04,700 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4251 transitions. [2022-11-02 20:24:04,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4251 transitions. [2022-11-02 20:24:04,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:24:04,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4251 transitions. [2022-11-02 20:24:04,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 55.20779220779221) internal successors, (4251), 77 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,711 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 89.0) internal successors, (6942), 78 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:04,711 INFO L175 Difference]: Start difference. First operand has 704 places, 1103 transitions, 27938 flow. Second operand 77 states and 4251 transitions. [2022-11-02 20:24:04,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 1225 transitions, 32223 flow [2022-11-02 20:24:05,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 1225 transitions, 31923 flow, removed 116 selfloop flow, removed 18 redundant places. [2022-11-02 20:24:05,840 INFO L231 Difference]: Finished difference. Result has 771 places, 1154 transitions, 31217 flow [2022-11-02 20:24:05,841 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=27700, PETRI_DIFFERENCE_MINUEND_PLACES=683, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=31217, PETRI_PLACES=771, PETRI_TRANSITIONS=1154} [2022-11-02 20:24:05,841 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 692 predicate places. [2022-11-02 20:24:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1154 transitions, 31217 flow [2022-11-02 20:24:05,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:05,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:24:05,843 INFO L208 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] [2022-11-02 20:24:05,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:06,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:24:06,043 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:24:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1327157855, now seen corresponding path program 18 times [2022-11-02 20:24:06,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435167940] [2022-11-02 20:24:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:06,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:06,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:06,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435167940] [2022-11-02 20:24:06,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435167940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:06,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466784433] [2022-11-02 20:24:06,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:24:06,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:06,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:06,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:06,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:24:06,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-02 20:24:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:06,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:24:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466784433] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:08,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:08,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:24:08,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288167355] [2022-11-02 20:24:08,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:24:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:08,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:24:08,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:24:08,318 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:24:08,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1154 transitions, 31217 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:08,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:24:08,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:24:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:24:19,507 INFO L130 PetriNetUnfolder]: 1109/4135 cut-off events. [2022-11-02 20:24:19,507 INFO L131 PetriNetUnfolder]: For 149476/149476 co-relation queries the response was YES. [2022-11-02 20:24:19,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35502 conditions, 4135 events. 1109/4135 cut-off events. For 149476/149476 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42024 event pairs, 72 based on Foata normal form. 1/4132 useless extension candidates. Maximal degree in co-relation 35351. Up to 1095 conditions per place. [2022-11-02 20:24:19,599 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 327 selfloop transitions, 931 changer transitions 6/1306 dead transitions. [2022-11-02 20:24:19,599 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 864 places, 1306 transitions, 36610 flow [2022-11-02 20:24:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-02 20:24:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2022-11-02 20:24:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 5355 transitions. [2022-11-02 20:24:19,607 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6202942198540484 [2022-11-02 20:24:19,607 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 5355 transitions. [2022-11-02 20:24:19,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 5355 transitions. [2022-11-02 20:24:19,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:24:19,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 5355 transitions. [2022-11-02 20:24:19,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 55.20618556701031) internal successors, (5355), 97 states have internal predecessors, (5355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:19,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:19,631 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 89.0) internal successors, (8722), 98 states have internal predecessors, (8722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:19,631 INFO L175 Difference]: Start difference. First operand has 771 places, 1154 transitions, 31217 flow. Second operand 97 states and 5355 transitions. [2022-11-02 20:24:19,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 864 places, 1306 transitions, 36610 flow [2022-11-02 20:24:20,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 825 places, 1306 transitions, 35570 flow, removed 174 selfloop flow, removed 39 redundant places. [2022-11-02 20:24:21,027 INFO L231 Difference]: Finished difference. Result has 832 places, 1224 transitions, 34432 flow [2022-11-02 20:24:21,028 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=30225, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=34432, PETRI_PLACES=832, PETRI_TRANSITIONS=1224} [2022-11-02 20:24:21,029 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 753 predicate places. [2022-11-02 20:24:21,029 INFO L495 AbstractCegarLoop]: Abstraction has has 832 places, 1224 transitions, 34432 flow [2022-11-02 20:24:21,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:21,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:24:21,029 INFO L208 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] [2022-11-02 20:24:21,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:21,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:24:21,230 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:24:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash 274486639, now seen corresponding path program 19 times [2022-11-02 20:24:21,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:21,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59073792] [2022-11-02 20:24:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:21,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59073792] [2022-11-02 20:24:21,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59073792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:21,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11456411] [2022-11-02 20:24:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:24:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:21,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:21,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:24:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-02 20:24:21,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:22,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:23,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11456411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:23,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:23,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 37 [2022-11-02 20:24:23,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517046755] [2022-11-02 20:24:23,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:23,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:24:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:24:23,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:24:23,364 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:24:23,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 832 places, 1224 transitions, 34432 flow. Second operand has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:23,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:24:23,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:24:23,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:24:31,711 INFO L130 PetriNetUnfolder]: 1282/4591 cut-off events. [2022-11-02 20:24:31,711 INFO L131 PetriNetUnfolder]: For 183028/183028 co-relation queries the response was YES. [2022-11-02 20:24:31,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41098 conditions, 4591 events. 1282/4591 cut-off events. For 183028/183028 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 46895 event pairs, 106 based on Foata normal form. 1/4589 useless extension candidates. Maximal degree in co-relation 40944. Up to 1145 conditions per place. [2022-11-02 20:24:31,810 INFO L137 encePairwiseOnDemand]: 67/89 looper letters, 467 selfloop transitions, 940 changer transitions 6/1455 dead transitions. [2022-11-02 20:24:31,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 887 places, 1455 transitions, 42327 flow [2022-11-02 20:24:31,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:24:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2022-11-02 20:24:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3541 transitions. [2022-11-02 20:24:31,816 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6315320135544855 [2022-11-02 20:24:31,816 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3541 transitions. [2022-11-02 20:24:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3541 transitions. [2022-11-02 20:24:31,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:24:31,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3541 transitions. [2022-11-02 20:24:31,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 56.20634920634921) internal successors, (3541), 63 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,831 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 89.0) internal successors, (5696), 64 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:31,831 INFO L175 Difference]: Start difference. First operand has 832 places, 1224 transitions, 34432 flow. Second operand 63 states and 3541 transitions. [2022-11-02 20:24:31,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 887 places, 1455 transitions, 42327 flow [2022-11-02 20:24:33,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 838 places, 1455 transitions, 41495 flow, removed 199 selfloop flow, removed 49 redundant places. [2022-11-02 20:24:33,669 INFO L231 Difference]: Finished difference. Result has 850 places, 1369 transitions, 40767 flow [2022-11-02 20:24:33,671 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=33649, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=803, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=40767, PETRI_PLACES=850, PETRI_TRANSITIONS=1369} [2022-11-02 20:24:33,671 INFO L287 CegarLoopForPetriNet]: 79 programPoint places, 771 predicate places. [2022-11-02 20:24:33,671 INFO L495 AbstractCegarLoop]: Abstraction has has 850 places, 1369 transitions, 40767 flow [2022-11-02 20:24:33,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 53.62162162162162) internal successors, (1984), 37 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:33,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:24:33,673 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:24:33,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:24:33,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:24:33,873 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-02 20:24:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:24:33,874 INFO L85 PathProgramCache]: Analyzing trace with hash -128714601, now seen corresponding path program 20 times [2022-11-02 20:24:33,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:24:33,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088065042] [2022-11-02 20:24:33,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:24:33,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:24:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:24:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:34,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:24:34,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088065042] [2022-11-02 20:24:34,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088065042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:24:34,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267167534] [2022-11-02 20:24:34,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:24:34,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:24:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:24:34,554 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:24:34,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11e0d927-06ae-4e36-a438-72bfb41df480/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:24:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:24:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:24:34,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 20:24:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:24:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:35,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:24:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:24:37,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267167534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:24:37,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:24:37,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-11-02 20:24:37,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797423128] [2022-11-02 20:24:37,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:24:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:24:37,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:24:37,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:24:37,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:24:37,007 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 89 [2022-11-02 20:24:37,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 850 places, 1369 transitions, 40767 flow. Second operand has 46 states, 46 states have (on average 53.608695652173914) internal successors, (2466), 46 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:24:37,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:24:37,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 89 [2022-11-02 20:24:37,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand