./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/fib_safe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/fib_safe-7.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ --witnessprinter.witness.filename witness --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 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:30:52,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:30:52,333 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:30:52,338 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:30:52,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:30:52,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:30:52,364 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:30:52,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:30:52,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:30:52,371 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:30:52,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:30:52,372 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:30:52,373 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:30:52,374 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:30:52,375 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:30:52,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:30:52,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:30:52,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:30:52,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:30:52,378 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:30:52,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:30:52,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:30:52,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:30:52,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:30:52,380 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:30:52,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:30:52,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:30:52,382 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:30:52,383 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:30:52,383 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:30:52,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:30:52,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:30:52,385 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:30:52,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:30:52,386 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:30:52,386 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:30:52,386 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:30:52,386 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:30:52,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:30:52,387 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:30:52,387 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:30:52,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:30:52,388 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a12d5b905fa07b94a851888f481630fccc5d15913fb6b7efa54c908526d1783 [2023-11-23 22:30:52,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:30:52,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:30:52,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:30:52,763 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:30:52,763 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:30:52,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread/fib_safe-7.i [2023-11-23 22:30:55,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:30:56,196 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:30:56,197 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/sv-benchmarks/c/pthread/fib_safe-7.i [2023-11-23 22:30:56,219 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/data/6f576569d/8f2da93c02484fb5bc2ab6941669ab1c/FLAG1dd7b6de3 [2023-11-23 22:30:56,236 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/data/6f576569d/8f2da93c02484fb5bc2ab6941669ab1c [2023-11-23 22:30:56,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:30:56,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:30:56,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:30:56,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:30:56,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:30:56,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:56,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cd765b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56, skipping insertion in model container [2023-11-23 22:30:56,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:56,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:30:56,761 WARN L240 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_f268409b-c97c-447e-a9ee-855bd79052fe/sv-benchmarks/c/pthread/fib_safe-7.i[30241,30254] [2023-11-23 22:30:56,790 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:30:56,804 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:30:56,857 WARN L240 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_f268409b-c97c-447e-a9ee-855bd79052fe/sv-benchmarks/c/pthread/fib_safe-7.i[30241,30254] [2023-11-23 22:30:56,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:30:56,920 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:30:56,920 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:30:56,927 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:30:56,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56 WrapperNode [2023-11-23 22:30:56,928 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:30:56,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:30:56,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:30:56,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:30:56,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:56,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:56,986 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-11-23 22:30:56,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:30:56,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:30:56,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:30:56,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:30:56,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,000 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,003 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,016 INFO L189 HeapSplitter]: Split 4 memory accesses to 3 slices as follows [2, 1, 1] [2023-11-23 22:30:57,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,027 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,031 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:30:57,035 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:30:57,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:30:57,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:30:57,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (1/1) ... [2023-11-23 22:30:57,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:30:57,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:57,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:30:57,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:30:57,151 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-23 22:30:57,151 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-23 22:30:57,152 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-23 22:30:57,152 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-23 22:30:57,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:30:57,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:30:57,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:30:57,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:30:57,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:30:57,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:30:57,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:30:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:30:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:30:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:30:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:30:57,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:30:57,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:30:57,159 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 22:30:57,367 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:30:57,369 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:30:57,545 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:30:57,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:30:57,711 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 22:30:57,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:30:57 BoogieIcfgContainer [2023-11-23 22:30:57,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:30:57,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:30:57,715 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:30:57,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:30:57,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:30:56" (1/3) ... [2023-11-23 22:30:57,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e26c13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:30:57, skipping insertion in model container [2023-11-23 22:30:57,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:30:56" (2/3) ... [2023-11-23 22:30:57,720 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e26c13a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:30:57, skipping insertion in model container [2023-11-23 22:30:57,720 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:30:57" (3/3) ... [2023-11-23 22:30:57,721 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2023-11-23 22:30:57,731 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:30:57,743 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:30:57,743 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:30:57,743 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:30:57,788 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:30:57,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2023-11-23 22:30:57,849 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2023-11-23 22:30:57,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:30:57,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2023-11-23 22:30:57,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2023-11-23 22:30:57,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2023-11-23 22:30:57,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:30:57,878 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=LoopHeads, 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;@42bdd0e9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:30:57,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 22:30:57,890 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:30:57,890 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2023-11-23 22:30:57,890 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:30:57,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:57,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:57,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:30:57,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:57,898 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2023-11-23 22:30:57,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:57,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802517125] [2023-11-23 22:30:57,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:57,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:58,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802517125] [2023-11-23 22:30:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802517125] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:30:58,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:30:58,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:30:58,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442439728] [2023-11-23 22:30:58,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:30:58,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:30:58,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:30:58,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:30:58,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-23 22:30:58,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:58,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-23 22:30:58,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:58,499 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2023-11-23 22:30:58,499 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 22:30:58,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2023-11-23 22:30:58,506 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-11-23 22:30:58,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2023-11-23 22:30:58,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:30:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 22:30:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-23 22:30:58,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2023-11-23 22:30:58,523 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-23 22:30:58,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-23 22:30:58,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:58,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-23 22:30:58,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,533 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,535 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2023-11-23 22:30:58,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2023-11-23 22:30:58,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 22:30:58,542 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2023-11-23 22:30:58,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-23 22:30:58,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2023-11-23 22:30:58,548 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2023-11-23 22:30:58,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:58,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:58,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:30:58,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:30:58,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2023-11-23 22:30:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077478372] [2023-11-23 22:30:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:58,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:58,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077478372] [2023-11-23 22:30:58,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077478372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:58,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255120055] [2023-11-23 22:30:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:58,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:58,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:58,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:58,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:30:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:58,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 22:30:58,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:58,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:58,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255120055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:58,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:30:58,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-23 22:30:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744381645] [2023-11-23 22:30:58,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:58,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 22:30:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:58,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 22:30:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:30:58,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-23 22:30:58,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:58,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:58,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-23 22:30:58,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:30:59,172 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2023-11-23 22:30:59,172 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-23 22:30:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 802 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2023-11-23 22:30:59,177 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-23 22:30:59,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2023-11-23 22:30:59,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:30:59,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:30:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2023-11-23 22:30:59,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2023-11-23 22:30:59,181 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 118 transitions. [2023-11-23 22:30:59,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 118 transitions. [2023-11-23 22:30:59,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:30:59,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 118 transitions. [2023-11-23 22:30:59,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:59,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:59,185 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2023-11-23 22:30:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2023-11-23 22:30:59,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 22:30:59,189 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2023-11-23 22:30:59,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-11-23 22:30:59,190 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2023-11-23 22:30:59,190 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2023-11-23 22:30:59,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:59,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:30:59,191 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:30:59,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:30:59,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:59,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:30:59,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:30:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2023-11-23 22:30:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:30:59,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262315750] [2023-11-23 22:30:59,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:30:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:30:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:30:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:59,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:30:59,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262315750] [2023-11-23 22:30:59,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262315750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:30:59,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641170467] [2023-11-23 22:30:59,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 22:30:59,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:30:59,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:30:59,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:30:59,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:30:59,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 22:30:59,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:30:59,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 22:30:59,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:30:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:59,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:30:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:30:59,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641170467] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:30:59,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:30:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-23 22:30:59,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269841868] [2023-11-23 22:30:59,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:30:59,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 22:30:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:30:59,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 22:30:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:30:59,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-23 22:30:59,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:30:59,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:30:59,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-23 22:30:59,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:00,142 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2023-11-23 22:31:00,143 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2023-11-23 22:31:00,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1199 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2023-11-23 22:31:00,154 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-11-23 22:31:00,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2023-11-23 22:31:00,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:31:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-23 22:31:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2023-11-23 22:31:00,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2023-11-23 22:31:00,164 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 235 transitions. [2023-11-23 22:31:00,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 235 transitions. [2023-11-23 22:31:00,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:00,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 235 transitions. [2023-11-23 22:31:00,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 19.583333333333332) internal successors, (235), 12 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:00,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:00,173 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 29.0) internal successors, (377), 13 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:00,173 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2023-11-23 22:31:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2023-11-23 22:31:00,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-23 22:31:00,183 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2023-11-23 22:31:00,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2023-11-23 22:31:00,185 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2023-11-23 22:31:00,185 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2023-11-23 22:31:00,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:00,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:00,186 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:00,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:00,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:31:00,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:00,408 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2023-11-23 22:31:00,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:00,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992663062] [2023-11-23 22:31:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:00,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992663062] [2023-11-23 22:31:00,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992663062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:00,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536906170] [2023-11-23 22:31:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 22:31:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:00,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:00,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:31:00,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 22:31:00,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:00,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 22:31:00,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:00,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:01,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536906170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:01,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:01,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2023-11-23 22:31:01,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073078440] [2023-11-23 22:31:01,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:01,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 22:31:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 22:31:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2023-11-23 22:31:01,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2023-11-23 22:31:01,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:01,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:01,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2023-11-23 22:31:01,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:01,393 INFO L124 PetriNetUnfolderBase]: 367/601 cut-off events. [2023-11-23 22:31:01,393 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2023-11-23 22:31:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 601 events. 367/601 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1600 event pairs, 20 based on Foata normal form. 54/641 useless extension candidates. Maximal degree in co-relation 1730. Up to 136 conditions per place. [2023-11-23 22:31:01,401 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 110 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2023-11-23 22:31:01,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 137 transitions, 664 flow [2023-11-23 22:31:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:31:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-23 22:31:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 349 transitions. [2023-11-23 22:31:01,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6685823754789272 [2023-11-23 22:31:01,404 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 349 transitions. [2023-11-23 22:31:01,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 349 transitions. [2023-11-23 22:31:01,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:01,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 349 transitions. [2023-11-23 22:31:01,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 19.38888888888889) internal successors, (349), 18 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:01,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:01,408 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:01,408 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 18 states and 349 transitions. [2023-11-23 22:31:01,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 137 transitions, 664 flow [2023-11-23 22:31:01,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 137 transitions, 604 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-11-23 22:31:01,418 INFO L231 Difference]: Finished difference. Result has 71 places, 41 transitions, 218 flow [2023-11-23 22:31:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=41} [2023-11-23 22:31:01,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2023-11-23 22:31:01,420 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 41 transitions, 218 flow [2023-11-23 22:31:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:01,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:01,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:01,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:31:01,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:01,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1149575571, now seen corresponding path program 4 times [2023-11-23 22:31:01,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:01,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734994509] [2023-11-23 22:31:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:01,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:03,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734994509] [2023-11-23 22:31:03,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734994509] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:03,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494146442] [2023-11-23 22:31:03,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 22:31:03,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:03,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:03,366 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:03,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:31:03,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 22:31:03,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 22:31:03,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-23 22:31:03,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:31:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:04,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:31:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494146442] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:31:06,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:31:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2023-11-23 22:31:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177621589] [2023-11-23 22:31:06,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:31:06,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-23 22:31:06,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:31:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-23 22:31:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=3788, Unknown=0, NotChecked=0, Total=4422 [2023-11-23 22:31:06,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2023-11-23 22:31:06,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 41 transitions, 218 flow. Second operand has 67 states, 67 states have (on average 6.253731343283582) internal successors, (419), 67 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:06,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:31:06,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2023-11-23 22:31:06,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:31:39,301 INFO L124 PetriNetUnfolderBase]: 19201/31187 cut-off events. [2023-11-23 22:31:39,301 INFO L125 PetriNetUnfolderBase]: For 70323/70323 co-relation queries the response was YES. [2023-11-23 22:31:39,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85060 conditions, 31187 events. 19201/31187 cut-off events. For 70323/70323 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 202697 event pairs, 70 based on Foata normal form. 0/30817 useless extension candidates. Maximal degree in co-relation 85026. Up to 4023 conditions per place. [2023-11-23 22:31:39,598 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 655 selfloop transitions, 731 changer transitions 789/2178 dead transitions. [2023-11-23 22:31:39,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 2178 transitions, 13497 flow [2023-11-23 22:31:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2023-11-23 22:31:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2023-11-23 22:31:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 2657 transitions. [2023-11-23 22:31:39,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46040547565413276 [2023-11-23 22:31:39,612 INFO L72 ComplementDD]: Start complementDD. Operand 199 states and 2657 transitions. [2023-11-23 22:31:39,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 2657 transitions. [2023-11-23 22:31:39,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:31:39,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 199 states and 2657 transitions. [2023-11-23 22:31:39,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 200 states, 199 states have (on average 13.35175879396985) internal successors, (2657), 199 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:39,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 200 states, 200 states have (on average 29.0) internal successors, (5800), 200 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:39,642 INFO L81 ComplementDD]: Finished complementDD. Result has 200 states, 200 states have (on average 29.0) internal successors, (5800), 200 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:39,642 INFO L175 Difference]: Start difference. First operand has 71 places, 41 transitions, 218 flow. Second operand 199 states and 2657 transitions. [2023-11-23 22:31:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 2178 transitions, 13497 flow [2023-11-23 22:31:40,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2178 transitions, 11315 flow, removed 722 selfloop flow, removed 11 redundant places. [2023-11-23 22:31:40,157 INFO L231 Difference]: Finished difference. Result has 336 places, 834 transitions, 5040 flow [2023-11-23 22:31:40,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=199, PETRI_FLOW=5040, PETRI_PLACES=336, PETRI_TRANSITIONS=834} [2023-11-23 22:31:40,159 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-11-23 22:31:40,159 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 834 transitions, 5040 flow [2023-11-23 22:31:40,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.253731343283582) internal successors, (419), 67 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:31:40,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:31:40,160 INFO L208 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:31:40,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:31:40,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:40,372 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-23 22:31:40,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:31:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2056688419, now seen corresponding path program 1 times [2023-11-23 22:31:40,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:31:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474302096] [2023-11-23 22:31:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:31:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:31:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:31:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474302096] [2023-11-23 22:31:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474302096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:31:42,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35884070] [2023-11-23 22:31:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:31:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:31:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:31:42,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:31:42,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f268409b-c97c-447e-a9ee-855bd79052fe/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:31:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:31:42,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-23 22:31:42,147 INFO L285 TraceCheckSpWp]: Computing forward predicates...