./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/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_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/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_dd0ce627-4f0a-48a8-a598-88133b64e29e/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 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 --- 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 20:49:30,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:49:30,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:49:30,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:49:30,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:49:30,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:49:30,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:49:30,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:49:30,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:49:30,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:49:30,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:49:30,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:49:30,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:49:30,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:49:30,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:49:30,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:49:30,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:49:30,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:49:30,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:49:30,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:49:30,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:49:30,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:49:30,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:49:30,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:49:30,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:49:30,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:49:30,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:49:30,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:49:30,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:49:30,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:49:30,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:49:30,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:49:30,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:49:30,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:49:30,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:49:30,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:49:30,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:49:30,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:49:30,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:49:30,391 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:49:30,392 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:49:30,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:49:30,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:49:30,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:49:30,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:49:30,421 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:49:30,422 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:49:30,423 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:49:30,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:49:30,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:49:30,424 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:49:30,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:49:30,425 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:49:30,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:49:30,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:49:30,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:49:30,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:49:30,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:49:30,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:49:30,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:49:30,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:49:30,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:49:30,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:49:30,428 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:49:30,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:49:30,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:49:30,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:30,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:49:30,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:49:30,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:49:30,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:49:30,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:49:30,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:49:30,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:49:30,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:49:30,432 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_dd0ce627-4f0a-48a8-a598-88133b64e29e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65bf47faf943da19c0d2d15e35f35ceed9dd68ed50ac4355a0589bd57bf3d155 [2022-11-02 20:49:30,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:49:30,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:49:30,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:49:30,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:49:30,864 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:49:30,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-11-02 20:49:30,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/data/24f4d216a/19bce9e476b24492b15e0a0d9842d568/FLAGd9b09b3b4 [2022-11-02 20:49:31,413 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:49:31,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c [2022-11-02 20:49:31,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/data/24f4d216a/19bce9e476b24492b15e0a0d9842d568/FLAGd9b09b3b4 [2022-11-02 20:49:31,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/data/24f4d216a/19bce9e476b24492b15e0a0d9842d568 [2022-11-02 20:49:31,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:49:31,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:49:31,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:31,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:49:31,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:49:31,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:31" (1/1) ... [2022-11-02 20:49:31,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72289adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:31, skipping insertion in model container [2022-11-02 20:49:31,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:49:31" (1/1) ... [2022-11-02 20:49:31,824 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:49:31,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:49:32,078 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_dd0ce627-4f0a-48a8-a598-88133b64e29e/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2476,2489] [2022-11-02 20:49:32,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:32,100 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:49:32,139 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_dd0ce627-4f0a-48a8-a598-88133b64e29e/sv-benchmarks/c/weaver/popl20-counter-determinism.wvr.c[2476,2489] [2022-11-02 20:49:32,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:49:32,155 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:49:32,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32 WrapperNode [2022-11-02 20:49:32,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:49:32,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:32,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:49:32,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:49:32,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,198 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 116 [2022-11-02 20:49:32,198 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:49:32,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:49:32,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:49:32,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:49:32,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:49:32,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:49:32,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:49:32,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:49:32,232 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (1/1) ... [2022-11-02 20:49:32,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:49:32,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:32,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:49:32,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:49:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:49:32,334 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-02 20:49:32,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-02 20:49:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-02 20:49:32,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-02 20:49:32,335 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-02 20:49:32,335 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-02 20:49:32,337 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-02 20:49:32,338 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-02 20:49:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:49:32,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:49:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:49:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-02 20:49:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-02 20:49:32,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:49:32,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:49:32,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:49:32,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:49:32,342 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 20:49:32,483 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:49:32,485 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:49:32,778 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:49:32,838 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:49:32,838 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:49:32,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:32 BoogieIcfgContainer [2022-11-02 20:49:32,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:49:32,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:49:32,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:49:32,848 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:49:32,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:49:31" (1/3) ... [2022-11-02 20:49:32,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be84eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:32, skipping insertion in model container [2022-11-02 20:49:32,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:49:32" (2/3) ... [2022-11-02 20:49:32,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be84eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:49:32, skipping insertion in model container [2022-11-02 20:49:32,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:49:32" (3/3) ... [2022-11-02 20:49:32,852 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2022-11-02 20:49:32,862 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-02 20:49:32,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:49:32,875 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:49:32,875 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-02 20:49:32,951 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-02 20:49:32,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 124 transitions, 280 flow [2022-11-02 20:49:33,142 INFO L130 PetriNetUnfolder]: 9/120 cut-off events. [2022-11-02 20:49:33,143 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:49:33,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 120 events. 9/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 94 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 79. Up to 2 conditions per place. [2022-11-02 20:49:33,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 124 transitions, 280 flow [2022-11-02 20:49:33,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 107 transitions, 238 flow [2022-11-02 20:49:33,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:49:33,215 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;@4437eb3c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:49:33,216 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-02 20:49:33,295 INFO L130 PetriNetUnfolder]: 9/106 cut-off events. [2022-11-02 20:49:33,297 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-02 20:49:33,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:33,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:33,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:33,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 2011500860, now seen corresponding path program 1 times [2022-11-02 20:49:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:33,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152944174] [2022-11-02 20:49:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:33,668 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 20:49:33,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:33,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152944174] [2022-11-02 20:49:33,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152944174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:33,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:33,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:49:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260194557] [2022-11-02 20:49:33,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:33,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:49:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:49:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:49:33,746 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 124 [2022-11-02 20:49:33,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 107 transitions, 238 flow. Second operand has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 20:49:33,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:33,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 124 [2022-11-02 20:49:33,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:34,011 INFO L130 PetriNetUnfolder]: 121/483 cut-off events. [2022-11-02 20:49:34,012 INFO L131 PetriNetUnfolder]: For 106/107 co-relation queries the response was YES. [2022-11-02 20:49:34,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 483 events. 121/483 cut-off events. For 106/107 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 2243 event pairs, 51 based on Foata normal form. 118/532 useless extension candidates. Maximal degree in co-relation 568. Up to 163 conditions per place. [2022-11-02 20:49:34,023 INFO L137 encePairwiseOnDemand]: 119/124 looper letters, 12 selfloop transitions, 0 changer transitions 1/102 dead transitions. [2022-11-02 20:49:34,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 252 flow [2022-11-02 20:49:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:49:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-02 20:49:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 229 transitions. [2022-11-02 20:49:34,078 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9233870967741935 [2022-11-02 20:49:34,079 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 229 transitions. [2022-11-02 20:49:34,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 229 transitions. [2022-11-02 20:49:34,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:34,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 229 transitions. [2022-11-02 20:49:34,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 114.5) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states 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 20:49:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 20:49:34,097 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states 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 20:49:34,099 INFO L175 Difference]: Start difference. First operand has 111 places, 107 transitions, 238 flow. Second operand 2 states and 229 transitions. [2022-11-02 20:49:34,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 252 flow [2022-11-02 20:49:34,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 102 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-11-02 20:49:34,109 INFO L231 Difference]: Finished difference. Result has 104 places, 101 transitions, 210 flow [2022-11-02 20:49:34,111 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=210, PETRI_PLACES=104, PETRI_TRANSITIONS=101} [2022-11-02 20:49:34,115 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, -7 predicate places. [2022-11-02 20:49:34,115 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 101 transitions, 210 flow [2022-11-02 20:49:34,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 20:49:34,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:34,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:34,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:49:34,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:34,118 INFO L85 PathProgramCache]: Analyzing trace with hash -528235981, now seen corresponding path program 1 times [2022-11-02 20:49:34,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:34,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088723285] [2022-11-02 20:49:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:34,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:34,734 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 20:49:34,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:34,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088723285] [2022-11-02 20:49:34,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088723285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:34,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:34,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:49:34,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81616767] [2022-11-02 20:49:34,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:34,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:49:34,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:34,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:49:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:49:34,744 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 124 [2022-11-02 20:49:34,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 101 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 20:49:34,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:34,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 124 [2022-11-02 20:49:34,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:34,972 INFO L130 PetriNetUnfolder]: 107/477 cut-off events. [2022-11-02 20:49:34,972 INFO L131 PetriNetUnfolder]: For 34/35 co-relation queries the response was YES. [2022-11-02 20:49:34,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 477 events. 107/477 cut-off events. For 34/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2102 event pairs, 26 based on Foata normal form. 15/434 useless extension candidates. Maximal degree in co-relation 656. Up to 124 conditions per place. [2022-11-02 20:49:34,976 INFO L137 encePairwiseOnDemand]: 115/124 looper letters, 32 selfloop transitions, 5 changer transitions 5/125 dead transitions. [2022-11-02 20:49:34,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 125 transitions, 354 flow [2022-11-02 20:49:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:49:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 640 transitions. [2022-11-02 20:49:34,983 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8602150537634409 [2022-11-02 20:49:34,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 640 transitions. [2022-11-02 20:49:34,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 640 transitions. [2022-11-02 20:49:34,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:34,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 640 transitions. [2022-11-02 20:49:34,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.66666666666667) internal successors, (640), 6 states have internal predecessors, (640), 0 states have call successors, (0), 0 states 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 20:49:34,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:34,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:34,990 INFO L175 Difference]: Start difference. First operand has 104 places, 101 transitions, 210 flow. Second operand 6 states and 640 transitions. [2022-11-02 20:49:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 125 transitions, 354 flow [2022-11-02 20:49:34,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:35,000 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 249 flow [2022-11-02 20:49:35,000 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2022-11-02 20:49:35,001 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 1 predicate places. [2022-11-02 20:49:35,001 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 249 flow [2022-11-02 20:49:35,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states 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 20:49:35,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:35,003 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:35,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:49:35,003 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash -549861099, now seen corresponding path program 1 times [2022-11-02 20:49:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:35,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96160555] [2022-11-02 20:49:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:35,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:35,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96160555] [2022-11-02 20:49:35,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96160555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:35,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:35,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:35,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867881376] [2022-11-02 20:49:35,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:35,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:35,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:35,175 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:49:35,176 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:35,176 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:35,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:49:35,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:37,219 INFO L130 PetriNetUnfolder]: 6700/10882 cut-off events. [2022-11-02 20:49:37,220 INFO L131 PetriNetUnfolder]: For 1841/1841 co-relation queries the response was YES. [2022-11-02 20:49:37,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22189 conditions, 10882 events. 6700/10882 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 78123 event pairs, 2593 based on Foata normal form. 0/8184 useless extension candidates. Maximal degree in co-relation 22181. Up to 4996 conditions per place. [2022-11-02 20:49:37,325 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 65 selfloop transitions, 5 changer transitions 11/154 dead transitions. [2022-11-02 20:49:37,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 551 flow [2022-11-02 20:49:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:49:37,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2022-11-02 20:49:37,330 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-11-02 20:49:37,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 616 transitions. [2022-11-02 20:49:37,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 616 transitions. [2022-11-02 20:49:37,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:37,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 616 transitions. [2022-11-02 20:49:37,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 20:49:37,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:37,339 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:37,340 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 249 flow. Second operand 6 states and 616 transitions. [2022-11-02 20:49:37,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 551 flow [2022-11-02 20:49:37,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 154 transitions, 547 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-02 20:49:37,377 INFO L231 Difference]: Finished difference. Result has 116 places, 106 transitions, 271 flow [2022-11-02 20:49:37,377 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=271, PETRI_PLACES=116, PETRI_TRANSITIONS=106} [2022-11-02 20:49:37,378 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 5 predicate places. [2022-11-02 20:49:37,378 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 106 transitions, 271 flow [2022-11-02 20:49:37,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:37,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:37,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:49:37,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1678899691, now seen corresponding path program 2 times [2022-11-02 20:49:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:37,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849934233] [2022-11-02 20:49:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:37,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:37,580 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 20:49:37,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849934233] [2022-11-02 20:49:37,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849934233] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:49:37,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20049090] [2022-11-02 20:49:37,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:49:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:49:37,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:49:37,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:49:37,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:49:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:49:37,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:49:37,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:49:37,806 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 20:49:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:49:37,857 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 20:49:37,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20049090] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:49:37,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:49:37,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-11-02 20:49:37,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24071030] [2022-11-02 20:49:37,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:49:37,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:49:37,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:37,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:49:37,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:49:37,861 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:49:37,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 106 transitions, 271 flow. Second operand has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 20:49:37,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:37,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:49:37,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:41,057 INFO L130 PetriNetUnfolder]: 11071/18071 cut-off events. [2022-11-02 20:49:41,057 INFO L131 PetriNetUnfolder]: For 5813/6596 co-relation queries the response was YES. [2022-11-02 20:49:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40047 conditions, 18071 events. 11071/18071 cut-off events. For 5813/6596 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 143633 event pairs, 1277 based on Foata normal form. 780/16577 useless extension candidates. Maximal degree in co-relation 40037. Up to 2464 conditions per place. [2022-11-02 20:49:41,246 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 185 selfloop transitions, 24 changer transitions 3/286 dead transitions. [2022-11-02 20:49:41,247 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 286 transitions, 1280 flow [2022-11-02 20:49:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:49:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-02 20:49:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1452 transitions. [2022-11-02 20:49:41,253 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.836405529953917 [2022-11-02 20:49:41,253 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1452 transitions. [2022-11-02 20:49:41,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1452 transitions. [2022-11-02 20:49:41,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:41,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1452 transitions. [2022-11-02 20:49:41,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 103.71428571428571) internal successors, (1452), 14 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 20:49:41,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 20:49:41,265 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 124.0) internal successors, (1860), 15 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states 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 20:49:41,266 INFO L175 Difference]: Start difference. First operand has 116 places, 106 transitions, 271 flow. Second operand 14 states and 1452 transitions. [2022-11-02 20:49:41,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 286 transitions, 1280 flow [2022-11-02 20:49:41,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 286 transitions, 1264 flow, removed 5 selfloop flow, removed 3 redundant places. [2022-11-02 20:49:41,294 INFO L231 Difference]: Finished difference. Result has 132 places, 132 transitions, 421 flow [2022-11-02 20:49:41,295 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=421, PETRI_PLACES=132, PETRI_TRANSITIONS=132} [2022-11-02 20:49:41,296 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 21 predicate places. [2022-11-02 20:49:41,297 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 132 transitions, 421 flow [2022-11-02 20:49:41,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.11111111111111) internal successors, (838), 9 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 20:49:41,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:41,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:41,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:49:41,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:49:41,512 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:41,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1777810487, now seen corresponding path program 1 times [2022-11-02 20:49:41,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:41,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537920498] [2022-11-02 20:49:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:41,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:41,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537920498] [2022-11-02 20:49:41,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537920498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:41,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:41,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:41,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669512251] [2022-11-02 20:49:41,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:41,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:41,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:41,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:41,643 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:49:41,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 132 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:41,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:41,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:49:41,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:46,673 INFO L130 PetriNetUnfolder]: 20247/32769 cut-off events. [2022-11-02 20:49:46,673 INFO L131 PetriNetUnfolder]: For 36066/39241 co-relation queries the response was YES. [2022-11-02 20:49:46,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87365 conditions, 32769 events. 20247/32769 cut-off events. For 36066/39241 co-relation queries the response was YES. Maximal size of possible extension queue 1856. Compared 282180 event pairs, 9264 based on Foata normal form. 1816/32677 useless extension candidates. Maximal degree in co-relation 87349. Up to 15847 conditions per place. [2022-11-02 20:49:47,055 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 132 selfloop transitions, 6 changer transitions 5/229 dead transitions. [2022-11-02 20:49:47,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 229 transitions, 1137 flow [2022-11-02 20:49:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:47,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:49:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 616 transitions. [2022-11-02 20:49:47,058 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8279569892473119 [2022-11-02 20:49:47,058 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 616 transitions. [2022-11-02 20:49:47,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 616 transitions. [2022-11-02 20:49:47,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:47,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 616 transitions. [2022-11-02 20:49:47,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 20:49:47,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:47,064 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:47,065 INFO L175 Difference]: Start difference. First operand has 132 places, 132 transitions, 421 flow. Second operand 6 states and 616 transitions. [2022-11-02 20:49:47,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 229 transitions, 1137 flow [2022-11-02 20:49:47,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 229 transitions, 1137 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-02 20:49:47,145 INFO L231 Difference]: Finished difference. Result has 140 places, 134 transitions, 451 flow [2022-11-02 20:49:47,145 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=140, PETRI_TRANSITIONS=134} [2022-11-02 20:49:47,148 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 29 predicate places. [2022-11-02 20:49:47,149 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 134 transitions, 451 flow [2022-11-02 20:49:47,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:47,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:47,150 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:49:47,150 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:47,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:47,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1330422949, now seen corresponding path program 2 times [2022-11-02 20:49:47,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:47,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224562238] [2022-11-02 20:49:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:47,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:47,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224562238] [2022-11-02 20:49:47,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224562238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:47,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:47,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:47,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389933968] [2022-11-02 20:49:47,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:47,436 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:49:47,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 134 transitions, 451 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:47,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:47,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:49:47,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:49:52,592 INFO L130 PetriNetUnfolder]: 20357/37477 cut-off events. [2022-11-02 20:49:52,592 INFO L131 PetriNetUnfolder]: For 44264/47262 co-relation queries the response was YES. [2022-11-02 20:49:52,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100098 conditions, 37477 events. 20357/37477 cut-off events. For 44264/47262 co-relation queries the response was YES. Maximal size of possible extension queue 1742. Compared 362252 event pairs, 14078 based on Foata normal form. 2706/39454 useless extension candidates. Maximal degree in co-relation 100078. Up to 18541 conditions per place. [2022-11-02 20:49:53,204 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 81 selfloop transitions, 8 changer transitions 15/187 dead transitions. [2022-11-02 20:49:53,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 890 flow [2022-11-02 20:49:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:49:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:49:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 617 transitions. [2022-11-02 20:49:53,212 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8293010752688172 [2022-11-02 20:49:53,212 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 617 transitions. [2022-11-02 20:49:53,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 617 transitions. [2022-11-02 20:49:53,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:49:53,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 617 transitions. [2022-11-02 20:49:53,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.83333333333333) internal successors, (617), 6 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 20:49:53,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:53,218 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:49:53,218 INFO L175 Difference]: Start difference. First operand has 140 places, 134 transitions, 451 flow. Second operand 6 states and 617 transitions. [2022-11-02 20:49:53,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 890 flow [2022-11-02 20:49:53,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 187 transitions, 884 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-02 20:49:53,412 INFO L231 Difference]: Finished difference. Result has 145 places, 134 transitions, 468 flow [2022-11-02 20:49:53,412 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=145, PETRI_TRANSITIONS=134} [2022-11-02 20:49:53,413 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 34 predicate places. [2022-11-02 20:49:53,413 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 134 transitions, 468 flow [2022-11-02 20:49:53,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:53,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:49:53,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:49:53,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:49:53,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:49:53,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:49:53,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1422486707, now seen corresponding path program 3 times [2022-11-02 20:49:53,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:49:53,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338189370] [2022-11-02 20:49:53,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:49:53,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:49:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:49:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:49:53,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:49:53,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338189370] [2022-11-02 20:49:53,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338189370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:49:53,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:49:53,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:49:53,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886101615] [2022-11-02 20:49:53,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:49:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:49:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:49:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:49:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:49:53,549 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:49:53,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 134 transitions, 468 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:49:53,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:49:53,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:49:53,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:00,144 INFO L130 PetriNetUnfolder]: 25616/44154 cut-off events. [2022-11-02 20:50:00,144 INFO L131 PetriNetUnfolder]: For 51022/52568 co-relation queries the response was YES. [2022-11-02 20:50:00,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122380 conditions, 44154 events. 25616/44154 cut-off events. For 51022/52568 co-relation queries the response was YES. Maximal size of possible extension queue 2129. Compared 417161 event pairs, 10085 based on Foata normal form. 1611/45048 useless extension candidates. Maximal degree in co-relation 122358. Up to 17231 conditions per place. [2022-11-02 20:50:00,934 INFO L137 encePairwiseOnDemand]: 117/124 looper letters, 116 selfloop transitions, 16 changer transitions 1/211 dead transitions. [2022-11-02 20:50:00,934 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 211 transitions, 1092 flow [2022-11-02 20:50:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:50:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 619 transitions. [2022-11-02 20:50:00,937 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.831989247311828 [2022-11-02 20:50:00,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 619 transitions. [2022-11-02 20:50:00,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 619 transitions. [2022-11-02 20:50:00,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:00,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 619 transitions. [2022-11-02 20:50:00,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.16666666666667) internal successors, (619), 6 states have internal predecessors, (619), 0 states have call successors, (0), 0 states 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 20:50:00,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:50:00,943 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:50:00,943 INFO L175 Difference]: Start difference. First operand has 145 places, 134 transitions, 468 flow. Second operand 6 states and 619 transitions. [2022-11-02 20:50:00,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 211 transitions, 1092 flow [2022-11-02 20:50:01,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 211 transitions, 1077 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-02 20:50:01,541 INFO L231 Difference]: Finished difference. Result has 149 places, 140 transitions, 560 flow [2022-11-02 20:50:01,541 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=149, PETRI_TRANSITIONS=140} [2022-11-02 20:50:01,542 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 38 predicate places. [2022-11-02 20:50:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 140 transitions, 560 flow [2022-11-02 20:50:01,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:50:01,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:01,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:01,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:50:01,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:50:01,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:01,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1638935279, now seen corresponding path program 4 times [2022-11-02 20:50:01,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:01,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164218154] [2022-11-02 20:50:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:01,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:01,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:01,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164218154] [2022-11-02 20:50:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164218154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:01,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:01,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:50:01,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352402449] [2022-11-02 20:50:01,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:01,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:01,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:01,648 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:50:01,649 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 140 transitions, 560 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:50:01,649 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:01,649 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:50:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:09,102 INFO L130 PetriNetUnfolder]: 30289/53665 cut-off events. [2022-11-02 20:50:09,103 INFO L131 PetriNetUnfolder]: For 97362/102162 co-relation queries the response was YES. [2022-11-02 20:50:09,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154420 conditions, 53665 events. 30289/53665 cut-off events. For 97362/102162 co-relation queries the response was YES. Maximal size of possible extension queue 2487. Compared 526305 event pairs, 13199 based on Foata normal form. 4638/57337 useless extension candidates. Maximal degree in co-relation 154396. Up to 19845 conditions per place. [2022-11-02 20:50:09,997 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 154 selfloop transitions, 18 changer transitions 5/263 dead transitions. [2022-11-02 20:50:09,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 263 transitions, 1552 flow [2022-11-02 20:50:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-02 20:50:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 642 transitions. [2022-11-02 20:50:10,000 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8629032258064516 [2022-11-02 20:50:10,001 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 642 transitions. [2022-11-02 20:50:10,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 642 transitions. [2022-11-02 20:50:10,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:10,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 642 transitions. [2022-11-02 20:50:10,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 107.0) internal successors, (642), 6 states have internal predecessors, (642), 0 states have call successors, (0), 0 states 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 20:50:10,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:50:10,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 0 states have call successors, (0), 0 states 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 20:50:10,006 INFO L175 Difference]: Start difference. First operand has 149 places, 140 transitions, 560 flow. Second operand 6 states and 642 transitions. [2022-11-02 20:50:10,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 263 transitions, 1552 flow [2022-11-02 20:50:10,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 263 transitions, 1517 flow, removed 10 selfloop flow, removed 2 redundant places. [2022-11-02 20:50:10,304 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 701 flow [2022-11-02 20:50:10,304 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=701, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2022-11-02 20:50:10,305 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 44 predicate places. [2022-11-02 20:50:10,305 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 701 flow [2022-11-02 20:50:10,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:50:10,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:10,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:10,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:50:10,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:50:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash -739140587, now seen corresponding path program 5 times [2022-11-02 20:50:10,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986174741] [2022-11-02 20:50:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:10,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:10,431 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 20:50:10,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:10,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986174741] [2022-11-02 20:50:10,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986174741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:10,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950018302] [2022-11-02 20:50:10,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:50:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:10,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:10,434 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:10,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:50:10,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:50:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:50:10,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:50:10,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:10,622 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 20:50:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:10,658 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 20:50:10,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950018302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:10,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:10,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-02 20:50:10,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801121831] [2022-11-02 20:50:10,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:10,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:50:10,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:10,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:50:10,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:50:10,666 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:50:10,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 701 flow. Second operand has 11 states, 11 states have (on average 93.18181818181819) internal successors, (1025), 11 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 20:50:10,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:10,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:50:10,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-02 20:50:20,337 INFO L130 PetriNetUnfolder]: 32223/57073 cut-off events. [2022-11-02 20:50:20,337 INFO L131 PetriNetUnfolder]: For 129474/134961 co-relation queries the response was YES. [2022-11-02 20:50:20,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175593 conditions, 57073 events. 32223/57073 cut-off events. For 129474/134961 co-relation queries the response was YES. Maximal size of possible extension queue 2808. Compared 569721 event pairs, 10179 based on Foata normal form. 5788/61901 useless extension candidates. Maximal degree in co-relation 175566. Up to 14499 conditions per place. [2022-11-02 20:50:21,056 INFO L137 encePairwiseOnDemand]: 116/124 looper letters, 173 selfloop transitions, 40 changer transitions 2/301 dead transitions. [2022-11-02 20:50:21,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 301 transitions, 2036 flow [2022-11-02 20:50:21,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-02 20:50:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 953 transitions. [2022-11-02 20:50:21,061 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8539426523297491 [2022-11-02 20:50:21,061 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 953 transitions. [2022-11-02 20:50:21,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 953 transitions. [2022-11-02 20:50:21,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-02 20:50:21,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 953 transitions. [2022-11-02 20:50:21,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 105.88888888888889) internal successors, (953), 9 states have internal predecessors, (953), 0 states have call successors, (0), 0 states 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 20:50:21,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 20:50:21,075 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 124.0) internal successors, (1240), 10 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states 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 20:50:21,075 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 701 flow. Second operand 9 states and 953 transitions. [2022-11-02 20:50:21,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 301 transitions, 2036 flow [2022-11-02 20:50:21,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 301 transitions, 2010 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-02 20:50:21,634 INFO L231 Difference]: Finished difference. Result has 168 places, 177 transitions, 1124 flow [2022-11-02 20:50:21,634 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=124, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1124, PETRI_PLACES=168, PETRI_TRANSITIONS=177} [2022-11-02 20:50:21,635 INFO L287 CegarLoopForPetriNet]: 111 programPoint places, 57 predicate places. [2022-11-02 20:50:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 177 transitions, 1124 flow [2022-11-02 20:50:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 93.18181818181819) internal successors, (1025), 11 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 20:50:21,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-11-02 20:50:21,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:21,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd0ce627-4f0a-48a8-a598-88133b64e29e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:21,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-11-02 20:50:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:21,864 INFO L85 PathProgramCache]: Analyzing trace with hash -998187963, now seen corresponding path program 6 times [2022-11-02 20:50:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:21,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421919527] [2022-11-02 20:50:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:21,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:50:21,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421919527] [2022-11-02 20:50:21,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421919527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:21,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:21,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:50:21,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485598223] [2022-11-02 20:50:21,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:21,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:21,977 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 124 [2022-11-02 20:50:21,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 177 transitions, 1124 flow. Second operand has 5 states, 5 states have (on average 94.0) internal successors, (470), 5 states have internal predecessors, (470), 0 states have call successors, (0), 0 states 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 20:50:21,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-02 20:50:21,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 124 [2022-11-02 20:50:21,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand