./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-11.i --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_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/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_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/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_d0d99516-462c-4ee0-9d57-611baa753913/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 dd8583a115904a75c64c276a67bc1fecbbb0d70873f2ea75f8f51b865297f64f
--- 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 20:30:40,359 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2022-11-02 20:30:40,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2022-11-02 20:30:40,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2022-11-02 20:30:40,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2022-11-02 20:30:40,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2022-11-02 20:30:40,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2022-11-02 20:30:40,418 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2022-11-02 20:30:40,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2022-11-02 20:30:40,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2022-11-02 20:30:40,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2022-11-02 20:30:40,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2022-11-02 20:30:40,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2022-11-02 20:30:40,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2022-11-02 20:30:40,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2022-11-02 20:30:40,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2022-11-02 20:30:40,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2022-11-02 20:30:40,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2022-11-02 20:30:40,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2022-11-02 20:30:40,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2022-11-02 20:30:40,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2022-11-02 20:30:40,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2022-11-02 20:30:40,461 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2022-11-02 20:30:40,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2022-11-02 20:30:40,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2022-11-02 20:30:40,466 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2022-11-02 20:30:40,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2022-11-02 20:30:40,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2022-11-02 20:30:40,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2022-11-02 20:30:40,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2022-11-02 20:30:40,476 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2022-11-02 20:30:40,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2022-11-02 20:30:40,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2022-11-02 20:30:40,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2022-11-02 20:30:40,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2022-11-02 20:30:40,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2022-11-02 20:30:40,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2022-11-02 20:30:40,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2022-11-02 20:30:40,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2022-11-02 20:30:40,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2022-11-02 20:30:40,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2022-11-02 20:30:40,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf
[2022-11-02 20:30:40,535 INFO L113 SettingsManager]: Loading preferences was successful
[2022-11-02 20:30:40,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2022-11-02 20:30:40,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2022-11-02 20:30:40,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2022-11-02 20:30:40,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2022-11-02 20:30:40,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2022-11-02 20:30:40,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2022-11-02 20:30:40,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2022-11-02 20:30:40,542 INFO L138 SettingsManager]: * Use SBE=true
[2022-11-02 20:30:40,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2022-11-02 20:30:40,544 INFO L138 SettingsManager]: * sizeof long=4
[2022-11-02 20:30:40,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2022-11-02 20:30:40,545 INFO L138 SettingsManager]: * sizeof POINTER=4
[2022-11-02 20:30:40,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2022-11-02 20:30:40,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2022-11-02 20:30:40,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2022-11-02 20:30:40,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2022-11-02 20:30:40,546 INFO L138 SettingsManager]: * sizeof long double=12
[2022-11-02 20:30:40,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2022-11-02 20:30:40,547 INFO L138 SettingsManager]: * Use constant arrays=true
[2022-11-02 20:30:40,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2022-11-02 20:30:40,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2022-11-02 20:30:40,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2022-11-02 20:30:40,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2022-11-02 20:30:40,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:30:40,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2022-11-02 20:30:40,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2022-11-02 20:30:40,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2022-11-02 20:30:40,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2022-11-02 20:30:40,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2022-11-02 20:30:40,553 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2022-11-02 20:30:40,553 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2022-11-02 20:30:40,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2022-11-02 20:30:40,554 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_d0d99516-462c-4ee0-9d57-611baa753913/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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) )
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit
Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd8583a115904a75c64c276a67bc1fecbbb0d70873f2ea75f8f51b865297f64f
[2022-11-02 20:30:40,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2022-11-02 20:30:40,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2022-11-02 20:30:40,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2022-11-02 20:30:40,888 INFO L271 PluginConnector]: Initializing CDTParser...
[2022-11-02 20:30:40,889 INFO L275 PluginConnector]: CDTParser initialized
[2022-11-02 20:30:40,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/pthread/fib_unsafe-11.i
[2022-11-02 20:30:40,971 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/data/fbfb61d60/1f1ad90c86404eb896bbc339f0b153e6/FLAG4181a54ef
[2022-11-02 20:30:41,564 INFO L306 CDTParser]: Found 1 translation units.
[2022-11-02 20:30:41,565 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/sv-benchmarks/c/pthread/fib_unsafe-11.i
[2022-11-02 20:30:41,586 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/data/fbfb61d60/1f1ad90c86404eb896bbc339f0b153e6/FLAG4181a54ef
[2022-11-02 20:30:41,817 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/data/fbfb61d60/1f1ad90c86404eb896bbc339f0b153e6
[2022-11-02 20:30:41,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2022-11-02 20:30:41,821 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements.
[2022-11-02 20:30:41,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2022-11-02 20:30:41,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2022-11-02 20:30:41,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2022-11-02 20:30:41,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:41" (1/1) ...
[2022-11-02 20:30:41,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f99bd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:41, skipping insertion in model container
[2022-11-02 20:30:41,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:30:41" (1/1) ...
[2022-11-02 20:30:41,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2022-11-02 20:30:41,915 INFO L178 MainTranslator]: Built tables and reachable declarations
[2022-11-02 20:30:42,303 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_d0d99516-462c-4ee0-9d57-611baa753913/sv-benchmarks/c/pthread/fib_unsafe-11.i[30813,30826]
[2022-11-02 20:30:42,307 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:30:42,317 INFO L203 MainTranslator]: Completed pre-run
[2022-11-02 20:30:42,362 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_d0d99516-462c-4ee0-9d57-611baa753913/sv-benchmarks/c/pthread/fib_unsafe-11.i[30813,30826]
[2022-11-02 20:30:42,364 INFO L210 PostProcessor]: Analyzing one entry point: main
[2022-11-02 20:30:42,399 INFO L208 MainTranslator]: Completed translation
[2022-11-02 20:30:42,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42 WrapperNode
[2022-11-02 20:30:42,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2022-11-02 20:30:42,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2022-11-02 20:30:42,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner...
[2022-11-02 20:30:42,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized
[2022-11-02 20:30:42,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,470 INFO L138 Inliner]: procedures = 164, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71
[2022-11-02 20:30:42,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2022-11-02 20:30:42,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2022-11-02 20:30:42,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2022-11-02 20:30:42,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2022-11-02 20:30:42,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2022-11-02 20:30:42,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2022-11-02 20:30:42,536 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2022-11-02 20:30:42,536 INFO L275 PluginConnector]: RCFGBuilder initialized
[2022-11-02 20:30:42,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (1/1) ...
[2022-11-02 20:30:42,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2022-11-02 20:30:42,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:30:42,597 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
[2022-11-02 20:30:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process
[2022-11-02 20:30:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure t1
[2022-11-02 20:30:42,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t1
[2022-11-02 20:30:42,643 INFO L130 BoogieDeclarations]: Found specification of procedure t2
[2022-11-02 20:30:42,643 INFO L138 BoogieDeclarations]: Found implementation of procedure t2
[2022-11-02 20:30:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2022-11-02 20:30:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2022-11-02 20:30:42,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2022-11-02 20:30:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2022-11-02 20:30:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2022-11-02 20:30:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2022-11-02 20:30:42,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2022-11-02 20:30:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2022-11-02 20:30:42,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2022-11-02 20:30:42,648 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 20:30:42,831 INFO L235 CfgBuilder]: Building ICFG
[2022-11-02 20:30:42,834 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation
[2022-11-02 20:30:43,138 INFO L276 CfgBuilder]: Performing block encoding
[2022-11-02 20:30:43,147 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2022-11-02 20:30:43,148 INFO L300 CfgBuilder]: Removed 3 assume(true) statements.
[2022-11-02 20:30:43,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:43 BoogieIcfgContainer
[2022-11-02 20:30:43,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2022-11-02 20:30:43,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2022-11-02 20:30:43,155 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2022-11-02 20:30:43,165 INFO L275 PluginConnector]: TraceAbstraction initialized
[2022-11-02 20:30:43,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:30:41" (1/3) ...
[2022-11-02 20:30:43,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ef821b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:43, skipping insertion in model container
[2022-11-02 20:30:43,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:30:42" (2/3) ...
[2022-11-02 20:30:43,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16ef821b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:30:43, skipping insertion in model container
[2022-11-02 20:30:43,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:30:43" (3/3) ...
[2022-11-02 20:30:43,171 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i
[2022-11-02 20:30:43,184 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2022-11-02 20:30:43,201 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2022-11-02 20:30:43,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations.
[2022-11-02 20:30:43,201 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2022-11-02 20:30:43,335 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions.
[2022-11-02 20:30:43,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 96 transitions, 202 flow
[2022-11-02 20:30:43,499 INFO L130 PetriNetUnfolder]: 7/94 cut-off events.
[2022-11-02 20:30:43,499 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES.
[2022-11-02 20:30:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place.
[2022-11-02 20:30:43,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 96 transitions, 202 flow
[2022-11-02 20:30:43,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 94 transitions, 194 flow
[2022-11-02 20:30:43,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2022-11-02 20:30:43,556 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;@299ac656, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2022-11-02 20:30:43,556 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2022-11-02 20:30:43,586 INFO L130 PetriNetUnfolder]: 6/84 cut-off events.
[2022-11-02 20:30:43,587 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES.
[2022-11-02 20:30:43,587 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:43,588 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]
[2022-11-02 20:30:43,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:43,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1927097680, now seen corresponding path program 1 times
[2022-11-02 20:30:43,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:43,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423761099]
[2022-11-02 20:30:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:43,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:43,906 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 20:30:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:43,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423761099]
[2022-11-02 20:30:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423761099] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:30:43,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:30:43,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2022-11-02 20:30:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553393269]
[2022-11-02 20:30:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:30:43,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states
[2022-11-02 20:30:43,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2022-11-02 20:30:43,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2022-11-02 20:30:44,006 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 96
[2022-11-02 20:30:44,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 194 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 20:30:44,020 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:44,020 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 96
[2022-11-02 20:30:44,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2022-11-02 20:30:44,109 INFO L130 PetriNetUnfolder]: 3/89 cut-off events.
[2022-11-02 20:30:44,111 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES.
[2022-11-02 20:30:44,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 89 events. 3/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 0 based on Foata normal form. 5/90 useless extension candidates. Maximal degree in co-relation 60. Up to 3 conditions per place.
[2022-11-02 20:30:44,117 INFO L137 encePairwiseOnDemand]: 92/96 looper letters, 2 selfloop transitions, 0 changer transitions 0/89 dead transitions.
[2022-11-02 20:30:44,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 188 flow
[2022-11-02 20:30:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2022-11-02 20:30:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states.
[2022-11-02 20:30:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 184 transitions.
[2022-11-02 20:30:44,135 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9583333333333334
[2022-11-02 20:30:44,136 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 184 transitions.
[2022-11-02 20:30:44,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 184 transitions.
[2022-11-02 20:30:44,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2022-11-02 20:30:44,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 184 transitions.
[2022-11-02 20:30:44,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states 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 20:30:44,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 20:30:44,168 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 20:30:44,170 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 194 flow. Second operand 2 states and 184 transitions.
[2022-11-02 20:30:44,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 188 flow
[2022-11-02 20:30:44,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 89 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places.
[2022-11-02 20:30:44,189 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 182 flow
[2022-11-02 20:30:44,192 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=92, PETRI_TRANSITIONS=89}
[2022-11-02 20:30:44,197 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, -2 predicate places.
[2022-11-02 20:30:44,197 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 182 flow
[2022-11-02 20:30:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states 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 20:30:44,198 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:44,199 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]
[2022-11-02 20:30:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2022-11-02 20:30:44,200 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:44,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:44,203 INFO L85 PathProgramCache]: Analyzing trace with hash 560415153, now seen corresponding path program 1 times
[2022-11-02 20:30:44,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19956585]
[2022-11-02 20:30:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:44,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:44,464 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 20:30:44,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19956585]
[2022-11-02 20:30:44,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19956585] provided 1 perfect and 0 imperfect interpolant sequences
[2022-11-02 20:30:44,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2022-11-02 20:30:44,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2022-11-02 20:30:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873762273]
[2022-11-02 20:30:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2022-11-02 20:30:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states
[2022-11-02 20:30:44,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2022-11-02 20:30:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2022-11-02 20:30:44,472 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 96
[2022-11-02 20:30:44,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 20:30:44,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:44,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 96
[2022-11-02 20:30:44,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2022-11-02 20:30:44,531 INFO L130 PetriNetUnfolder]: 3/95 cut-off events.
[2022-11-02 20:30:44,531 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES.
[2022-11-02 20:30:44,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 95 events. 3/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 63 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place.
[2022-11-02 20:30:44,533 INFO L137 encePairwiseOnDemand]: 93/96 looper letters, 9 selfloop transitions, 2 changer transitions 0/92 dead transitions.
[2022-11-02 20:30:44,534 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 210 flow
[2022-11-02 20:30:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2022-11-02 20:30:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states.
[2022-11-02 20:30:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions.
[2022-11-02 20:30:44,537 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.90625
[2022-11-02 20:30:44,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions.
[2022-11-02 20:30:44,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions.
[2022-11-02 20:30:44,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2022-11-02 20:30:44,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions.
[2022-11-02 20:30:44,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2022-11-02 20:30:44,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:30:44,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states 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 20:30:44,545 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 182 flow. Second operand 3 states and 261 transitions.
[2022-11-02 20:30:44,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 210 flow
[2022-11-02 20:30:44,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 210 flow, removed 0 selfloop flow, removed 0 redundant places.
[2022-11-02 20:30:44,550 INFO L231 Difference]: Finished difference. Result has 95 places, 90 transitions, 194 flow
[2022-11-02 20:30:44,551 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=95, PETRI_TRANSITIONS=90}
[2022-11-02 20:30:44,552 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 1 predicate places.
[2022-11-02 20:30:44,552 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 90 transitions, 194 flow
[2022-11-02 20:30:44,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 20:30:44,553 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:44,553 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]
[2022-11-02 20:30:44,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2022-11-02 20:30:44,554 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:44,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -951035470, now seen corresponding path program 1 times
[2022-11-02 20:30:44,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:44,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162931204]
[2022-11-02 20:30:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:44,871 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 20:30:44,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:44,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162931204]
[2022-11-02 20:30:44,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162931204] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:30:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219780066]
[2022-11-02 20:30:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:30:44,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:30:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process
[2022-11-02 20:30:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:45,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core
[2022-11-02 20:30:45,046 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:30:45,129 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 20:30:45,129 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:30:45,200 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 20:30:45,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219780066] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:30:45,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-02 20:30:45,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10
[2022-11-02 20:30:45,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804854614]
[2022-11-02 20:30:45,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:30:45,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states
[2022-11-02 20:30:45,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2022-11-02 20:30:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90
[2022-11-02 20:30:45,216 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96
[2022-11-02 20:30:45,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 90 transitions, 194 flow. Second operand has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 20:30:45,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:45,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96
[2022-11-02 20:30:45,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2022-11-02 20:30:45,343 INFO L130 PetriNetUnfolder]: 3/104 cut-off events.
[2022-11-02 20:30:45,343 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES.
[2022-11-02 20:30:45,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 104 events. 3/104 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 2/103 useless extension candidates. Maximal degree in co-relation 133. Up to 6 conditions per place.
[2022-11-02 20:30:45,345 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 10 selfloop transitions, 9 changer transitions 0/98 dead transitions.
[2022-11-02 20:30:45,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 250 flow
[2022-11-02 20:30:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2022-11-02 20:30:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states.
[2022-11-02 20:30:45,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 750 transitions.
[2022-11-02 20:30:45,350 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8680555555555556
[2022-11-02 20:30:45,350 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 750 transitions.
[2022-11-02 20:30:45,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 750 transitions.
[2022-11-02 20:30:45,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2022-11-02 20:30:45,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 750 transitions.
[2022-11-02 20:30:45,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 83.33333333333333) internal successors, (750), 9 states have internal predecessors, (750), 0 states have call successors, (0), 0 states 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 20:30:45,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 20:30:45,358 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states 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 20:30:45,358 INFO L175 Difference]: Start difference. First operand has 95 places, 90 transitions, 194 flow. Second operand 9 states and 750 transitions.
[2022-11-02 20:30:45,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 250 flow
[2022-11-02 20:30:45,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places.
[2022-11-02 20:30:45,362 INFO L231 Difference]: Finished difference. Result has 105 places, 96 transitions, 242 flow
[2022-11-02 20:30:45,362 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=105, PETRI_TRANSITIONS=96}
[2022-11-02 20:30:45,363 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 11 predicate places.
[2022-11-02 20:30:45,363 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 96 transitions, 242 flow
[2022-11-02 20:30:45,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 83.0) internal successors, (830), 10 states have internal predecessors, (830), 0 states have call successors, (0), 0 states 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 20:30:45,364 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:45,365 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:30:45,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0
[2022-11-02 20:30:45,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:45,583 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:45,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1666707666, now seen corresponding path program 2 times
[2022-11-02 20:30:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:45,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529884693]
[2022-11-02 20:30:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:45,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529884693]
[2022-11-02 20:30:45,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529884693] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:30:45,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469993386]
[2022-11-02 20:30:45,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2022-11-02 20:30:45,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:45,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:30:45,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:30:45,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process
[2022-11-02 20:30:45,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2022-11-02 20:30:45,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:30:45,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core
[2022-11-02 20:30:45,882 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:30:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:45,958 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:30:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:46,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469993386] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:30:46,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-02 20:30:46,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18
[2022-11-02 20:30:46,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616880396]
[2022-11-02 20:30:46,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:30:46,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states
[2022-11-02 20:30:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:46,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2022-11-02 20:30:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306
[2022-11-02 20:30:46,111 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96
[2022-11-02 20:30:46,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 96 transitions, 242 flow. Second operand has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 20:30:46,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:46,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96
[2022-11-02 20:30:46,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2022-11-02 20:30:46,373 INFO L130 PetriNetUnfolder]: 3/132 cut-off events.
[2022-11-02 20:30:46,374 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES.
[2022-11-02 20:30:46,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 132 events. 3/132 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 4/133 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place.
[2022-11-02 20:30:46,376 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 14 selfloop transitions, 21 changer transitions 0/114 dead transitions.
[2022-11-02 20:30:46,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 114 transitions, 408 flow
[2022-11-02 20:30:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2022-11-02 20:30:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2022-11-02 20:30:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1740 transitions.
[2022-11-02 20:30:46,381 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8630952380952381
[2022-11-02 20:30:46,382 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1740 transitions.
[2022-11-02 20:30:46,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1740 transitions.
[2022-11-02 20:30:46,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2022-11-02 20:30:46,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1740 transitions.
[2022-11-02 20:30:46,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 82.85714285714286) internal successors, (1740), 21 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states 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 20:30:46,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 20:30:46,392 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 96.0) internal successors, (2112), 22 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states 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 20:30:46,393 INFO L175 Difference]: Start difference. First operand has 105 places, 96 transitions, 242 flow. Second operand 21 states and 1740 transitions.
[2022-11-02 20:30:46,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 114 transitions, 408 flow
[2022-11-02 20:30:46,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 114 transitions, 394 flow, removed 6 selfloop flow, removed 1 redundant places.
[2022-11-02 20:30:46,398 INFO L231 Difference]: Finished difference. Result has 129 places, 109 transitions, 366 flow
[2022-11-02 20:30:46,399 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=366, PETRI_PLACES=129, PETRI_TRANSITIONS=109}
[2022-11-02 20:30:46,399 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 35 predicate places.
[2022-11-02 20:30:46,400 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 109 transitions, 366 flow
[2022-11-02 20:30:46,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 83.0) internal successors, (1494), 18 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 20:30:46,401 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:46,401 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:30:46,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0
[2022-11-02 20:30:46,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:46,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:46,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1283180782, now seen corresponding path program 3 times
[2022-11-02 20:30:46,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:46,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921709970]
[2022-11-02 20:30:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:47,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921709970]
[2022-11-02 20:30:47,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921709970] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:30:47,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068183856]
[2022-11-02 20:30:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2022-11-02 20:30:47,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:30:47,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:30:47,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2022-11-02 20:30:47,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2022-11-02 20:30:47,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:30:47,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core
[2022-11-02 20:30:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:30:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:47,371 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:30:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:47,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068183856] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:30:47,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-02 20:30:47,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34
[2022-11-02 20:30:47,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889749130]
[2022-11-02 20:30:47,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:30:47,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states
[2022-11-02 20:30:47,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2022-11-02 20:30:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122
[2022-11-02 20:30:47,817 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 96
[2022-11-02 20:30:47,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 109 transitions, 366 flow. Second operand has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states 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 20:30:47,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:47,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 96
[2022-11-02 20:30:47,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand
[2022-11-02 20:30:48,696 INFO L130 PetriNetUnfolder]: 3/188 cut-off events.
[2022-11-02 20:30:48,696 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES.
[2022-11-02 20:30:48,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 188 events. 3/188 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 438. Up to 27 conditions per place.
[2022-11-02 20:30:48,700 INFO L137 encePairwiseOnDemand]: 90/96 looper letters, 22 selfloop transitions, 45 changer transitions 0/146 dead transitions.
[2022-11-02 20:30:48,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 146 transitions, 788 flow
[2022-11-02 20:30:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states.
[2022-11-02 20:30:48,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2022-11-02 20:30:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3720 transitions.
[2022-11-02 20:30:48,716 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8611111111111112
[2022-11-02 20:30:48,717 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3720 transitions.
[2022-11-02 20:30:48,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3720 transitions.
[2022-11-02 20:30:48,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic.
[2022-11-02 20:30:48,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3720 transitions.
[2022-11-02 20:30:48,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 82.66666666666667) internal successors, (3720), 45 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states 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 20:30:48,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states 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 20:30:48,747 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 96.0) internal successors, (4416), 46 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states 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 20:30:48,747 INFO L175 Difference]: Start difference. First operand has 129 places, 109 transitions, 366 flow. Second operand 45 states and 3720 transitions.
[2022-11-02 20:30:48,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 146 transitions, 788 flow
[2022-11-02 20:30:48,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 146 transitions, 748 flow, removed 14 selfloop flow, removed 6 redundant places.
[2022-11-02 20:30:48,759 INFO L231 Difference]: Finished difference. Result has 176 places, 134 transitions, 644 flow
[2022-11-02 20:30:48,759 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=644, PETRI_PLACES=176, PETRI_TRANSITIONS=134}
[2022-11-02 20:30:48,760 INFO L287 CegarLoopForPetriNet]: 94 programPoint places, 82 predicate places.
[2022-11-02 20:30:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 134 transitions, 644 flow
[2022-11-02 20:30:48,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 83.0) internal successors, (2822), 34 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states 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 20:30:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace
[2022-11-02 20:30:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2022-11-02 20:30:48,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2022-11-02 20:30:48,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:48,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] ===
[2022-11-02 20:30:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2022-11-02 20:30:48,990 INFO L85 PathProgramCache]: Analyzing trace with hash 835265426, now seen corresponding path program 4 times
[2022-11-02 20:30:48,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2022-11-02 20:30:48,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899325367]
[2022-11-02 20:30:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2022-11-02 20:30:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2022-11-02 20:30:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2022-11-02 20:30:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2022-11-02 20:30:50,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899325367]
[2022-11-02 20:30:50,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899325367] provided 0 perfect and 1 imperfect interpolant sequences
[2022-11-02 20:30:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914995742]
[2022-11-02 20:30:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2022-11-02 20:30:50,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2022-11-02 20:30:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3
[2022-11-02 20:30:50,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2022-11-02 20:30:50,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d99516-462c-4ee0-9d57-611baa753913/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2022-11-02 20:30:50,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2022-11-02 20:30:50,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2022-11-02 20:30:50,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core
[2022-11-02 20:30:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2022-11-02 20:30:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 572 proven. 178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:54,184 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2022-11-02 20:30:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2022-11-02 20:30:59,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914995742] provided 0 perfect and 2 imperfect interpolant sequences
[2022-11-02 20:30:59,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2022-11-02 20:30:59,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 51, 51] total 130
[2022-11-02 20:30:59,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672316226]
[2022-11-02 20:30:59,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2022-11-02 20:30:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states
[2022-11-02 20:30:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2022-11-02 20:30:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants.
[2022-11-02 20:30:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1428, Invalid=15342, Unknown=0, NotChecked=0, Total=16770
[2022-11-02 20:30:59,644 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 96
[2022-11-02 20:30:59,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 134 transitions, 644 flow. Second operand has 130 states, 130 states have (on average 62.86923076923077) internal successors, (8173), 130 states have internal predecessors, (8173), 0 states have call successors, (0), 0 states 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 20:30:59,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user.
[2022-11-02 20:30:59,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 96
[2022-11-02 20:30:59,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand