./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya --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 a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:40:26,017 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:40:26,080 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-28 23:40:26,084 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:40:26,084 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:40:26,108 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:40:26,108 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:40:26,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:40:26,109 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:40:26,110 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:40:26,111 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:40:26,111 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:40:26,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:40:26,112 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:40:26,113 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:40:26,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:40:26,114 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-28 23:40:26,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:40:26,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:40:26,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:40:26,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:40:26,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-28 23:40:26,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:40:26,117 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-28 23:40:26,118 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:40:26,118 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-28 23:40:26,118 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:40:26,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:40:26,119 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:40:26,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:40:26,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:40:26,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:40:26,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:40:26,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:40:26,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-28 23:40:26,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:40:26,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:40:26,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:40:26,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:40:26,123 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-28 23:40:26,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:40:26,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:40:26,124 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9295efc0d8bacfc5fb202511f0d3721ae5554ffb4def47cf5dbf45088356869 [2023-11-28 23:40:26,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:40:26,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:40:26,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:40:26,365 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:40:26,366 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:40:26,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-28 23:40:29,027 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:40:29,258 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:40:29,258 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/sv-benchmarks/c/pthread-ext/04_incdec_cas.i [2023-11-28 23:40:29,270 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/data/485539109/933b619eb51d4d40ab53c46a4804b3b4/FLAG8b3e3b5df [2023-11-28 23:40:29,282 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/data/485539109/933b619eb51d4d40ab53c46a4804b3b4 [2023-11-28 23:40:29,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:40:29,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:40:29,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:40:29,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:40:29,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:40:29,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5280a3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29, skipping insertion in model container [2023-11-28 23:40:29,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,340 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:40:29,599 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2023-11-28 23:40:29,610 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2023-11-28 23:40:29,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:40:29,628 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:40:29,664 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30369,30382] [2023-11-28 23:40:29,668 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_5eed61b9-7f54-4951-bc45-8313ef7dcc22/sv-benchmarks/c/pthread-ext/04_incdec_cas.i[30869,30882] [2023-11-28 23:40:29,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:40:29,704 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 23:40:29,704 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-28 23:40:29,712 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:40:29,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29 WrapperNode [2023-11-28 23:40:29,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:40:29,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:40:29,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:40:29,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:40:29,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,760 INFO L138 Inliner]: procedures = 174, calls = 47, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 162 [2023-11-28 23:40:29,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:40:29,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:40:29,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:40:29,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:40:29,773 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,794 INFO L175 MemorySlicer]: Split 24 memory accesses to 5 slices as follows [9, 2, 6, 6, 1]. 38 percent of accesses are in the largest equivalence class. The 5 initializations are split as follows [1, 2, 2, 0, 0]. The 9 writes are split as follows [2, 0, 2, 4, 1]. [2023-11-28 23:40:29,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,808 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:40:29,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:40:29,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:40:29,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:40:29,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (1/1) ... [2023-11-28 23:40:29,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:40:29,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:40:29,845 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:40:29,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5eed61b9-7f54-4951-bc45-8313ef7dcc22/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:40:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 23:40:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 23:40:29,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-28 23:40:29,882 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 23:40:29,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-28 23:40:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-28 23:40:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-11-28 23:40:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-28 23:40:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-28 23:40:29,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-28 23:40:29,884 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-28 23:40:29,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:40:29,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:40:29,886 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-28 23:40:30,013 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:40:30,015 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:40:30,253 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:40:30,468 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:40:30,468 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 23:40:30,468 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:40:30 BoogieIcfgContainer [2023-11-28 23:40:30,468 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:40:30,470 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:40:30,471 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:40:30,474 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:40:30,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:40:29" (1/3) ... [2023-11-28 23:40:30,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3d5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:40:30, skipping insertion in model container [2023-11-28 23:40:30,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:40:29" (2/3) ... [2023-11-28 23:40:30,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3d5d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:40:30, skipping insertion in model container [2023-11-28 23:40:30,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:40:30" (3/3) ... [2023-11-28 23:40:30,477 INFO L112 eAbstractionObserver]: Analyzing ICFG 04_incdec_cas.i [2023-11-28 23:40:30,485 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-28 23:40:30,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:40:30,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-28 23:40:30,492 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-28 23:40:30,549 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:40:30,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 34 transitions, 72 flow [2023-11-28 23:40:30,604 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-28 23:40:30,604 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:40:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 91 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2023-11-28 23:40:30,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 34 transitions, 72 flow [2023-11-28 23:40:30,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 34 transitions, 72 flow [2023-11-28 23:40:30,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:40:30,628 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;@42997309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:40:30,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-28 23:40:30,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:40:30,635 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-11-28 23:40:30,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-28 23:40:30,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:30,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-28 23:40:30,636 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-28 23:40:30,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash 383278609, now seen corresponding path program 1 times [2023-11-28 23:40:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:30,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616128462] [2023-11-28 23:40:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:40:30,772 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:40:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:40:30,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:40:30,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:40:30,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-28 23:40:30,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-28 23:40:30,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-28 23:40:30,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-28 23:40:30,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-28 23:40:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 23:40:30,822 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-28 23:40:30,825 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:40:30,825 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-28 23:40:30,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:40:30,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 63 transitions, 136 flow [2023-11-28 23:40:30,922 INFO L124 PetriNetUnfolderBase]: 14/68 cut-off events. [2023-11-28 23:40:30,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-28 23:40:30,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 14/68 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 219 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2023-11-28 23:40:30,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 63 transitions, 136 flow [2023-11-28 23:40:30,927 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 63 transitions, 136 flow [2023-11-28 23:40:30,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:40:30,930 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;@42997309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:40:30,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-28 23:40:30,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:40:30,937 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-11-28 23:40:30,937 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:40:30,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:30,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:30,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:40:30,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash 965895634, now seen corresponding path program 1 times [2023-11-28 23:40:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:30,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092108355] [2023-11-28 23:40:30,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:40:31,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092108355] [2023-11-28 23:40:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092108355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:31,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:31,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:40:31,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090469821] [2023-11-28 23:40:31,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:40:31,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:40:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:40:31,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 63 [2023-11-28 23:40:31,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 63 transitions, 136 flow. Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:40:31,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 63 [2023-11-28 23:40:31,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:40:31,764 INFO L124 PetriNetUnfolderBase]: 2553/3945 cut-off events. [2023-11-28 23:40:31,764 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-28 23:40:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7826 conditions, 3945 events. 2553/3945 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20133 event pairs, 1938 based on Foata normal form. 0/3048 useless extension candidates. Maximal degree in co-relation 3620. Up to 3816 conditions per place. [2023-11-28 23:40:31,801 INFO L140 encePairwiseOnDemand]: 58/63 looper letters, 53 selfloop transitions, 0 changer transitions 0/58 dead transitions. [2023-11-28 23:40:31,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 232 flow [2023-11-28 23:40:31,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:40:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-28 23:40:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 68 transitions. [2023-11-28 23:40:31,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2023-11-28 23:40:31,813 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 68 transitions. [2023-11-28 23:40:31,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 68 transitions. [2023-11-28 23:40:31,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:40:31,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 68 transitions. [2023-11-28 23:40:31,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 34.0) internal successors, (68), 2 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,823 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,824 INFO L175 Difference]: Start difference. First operand has 54 places, 63 transitions, 136 flow. Second operand 2 states and 68 transitions. [2023-11-28 23:40:31,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 232 flow [2023-11-28 23:40:31,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:40:31,831 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 126 flow [2023-11-28 23:40:31,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=63, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=126, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-11-28 23:40:31,837 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 0 predicate places. [2023-11-28 23:40:31,837 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 126 flow [2023-11-28 23:40:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:31,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:31,838 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-28 23:40:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 23:40:31,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-28 23:40:31,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash -819103125, now seen corresponding path program 1 times [2023-11-28 23:40:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:31,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840130232] [2023-11-28 23:40:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:31,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:40:31,865 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:40:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:40:31,885 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:40:31,886 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:40:31,886 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-28 23:40:31,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-28 23:40:31,886 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-28 23:40:31,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-28 23:40:31,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-28 23:40:31,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-28 23:40:31,887 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-28 23:40:31,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 23:40:31,887 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-28 23:40:31,888 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:40:31,888 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-28 23:40:31,974 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:40:31,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 92 transitions, 202 flow [2023-11-28 23:40:32,001 INFO L124 PetriNetUnfolderBase]: 21/100 cut-off events. [2023-11-28 23:40:32,001 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-28 23:40:32,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 100 events. 21/100 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 371 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2023-11-28 23:40:32,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 92 transitions, 202 flow [2023-11-28 23:40:32,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 92 transitions, 202 flow [2023-11-28 23:40:32,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:40:32,006 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;@42997309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:40:32,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-28 23:40:32,010 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:40:32,010 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-11-28 23:40:32,010 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:40:32,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:32,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:32,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:40:32,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash -535575094, now seen corresponding path program 1 times [2023-11-28 23:40:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:32,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225670705] [2023-11-28 23:40:32,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:32,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:40:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:32,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225670705] [2023-11-28 23:40:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225670705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:40:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289846313] [2023-11-28 23:40:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:32,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:40:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:40:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:40:32,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2023-11-28 23:40:32,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:32,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:40:32,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2023-11-28 23:40:32,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:40:41,206 INFO L124 PetriNetUnfolderBase]: 81353/109105 cut-off events. [2023-11-28 23:40:41,206 INFO L125 PetriNetUnfolderBase]: For 2624/2624 co-relation queries the response was YES. [2023-11-28 23:40:41,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217387 conditions, 109105 events. 81353/109105 cut-off events. For 2624/2624 co-relation queries the response was YES. Maximal size of possible extension queue 3022. Compared 666780 event pairs, 62738 based on Foata normal form. 0/82232 useless extension candidates. Maximal degree in co-relation 14436. Up to 106616 conditions per place. [2023-11-28 23:40:41,769 INFO L140 encePairwiseOnDemand]: 85/92 looper letters, 78 selfloop transitions, 0 changer transitions 0/85 dead transitions. [2023-11-28 23:40:41,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 344 flow [2023-11-28 23:40:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-28 23:40:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-28 23:40:41,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 99 transitions. [2023-11-28 23:40:41,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2023-11-28 23:40:41,771 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 99 transitions. [2023-11-28 23:40:41,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 99 transitions. [2023-11-28 23:40:41,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:40:41,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 99 transitions. [2023-11-28 23:40:41,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:41,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:41,775 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:41,775 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 202 flow. Second operand 2 states and 99 transitions. [2023-11-28 23:40:41,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 344 flow [2023-11-28 23:40:41,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 85 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-28 23:40:41,783 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 186 flow [2023-11-28 23:40:41,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=186, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2023-11-28 23:40:41,785 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 0 predicate places. [2023-11-28 23:40:41,785 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 186 flow [2023-11-28 23:40:41,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:41,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:41,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:41,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 23:40:41,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:40:41,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:41,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2068044001, now seen corresponding path program 1 times [2023-11-28 23:40:41,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:41,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181955984] [2023-11-28 23:40:41,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:41,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:40:41,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:41,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181955984] [2023-11-28 23:40:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181955984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:40:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880892590] [2023-11-28 23:40:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:40:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:40:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:40:41,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 92 [2023-11-28 23:40:41,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:41,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:40:41,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 92 [2023-11-28 23:40:41,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:40:52,473 INFO L124 PetriNetUnfolderBase]: 103794/141004 cut-off events. [2023-11-28 23:40:52,473 INFO L125 PetriNetUnfolderBase]: For 1791/1791 co-relation queries the response was YES. [2023-11-28 23:40:52,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279230 conditions, 141004 events. 103794/141004 cut-off events. For 1791/1791 co-relation queries the response was YES. Maximal size of possible extension queue 4170. Compared 922660 event pairs, 23278 based on Foata normal form. 0/109801 useless extension candidates. Maximal degree in co-relation 279224. Up to 108783 conditions per place. [2023-11-28 23:40:53,027 INFO L140 encePairwiseOnDemand]: 83/92 looper letters, 194 selfloop transitions, 13 changer transitions 0/214 dead transitions. [2023-11-28 23:40:53,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 214 transitions, 883 flow [2023-11-28 23:40:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:40:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-28 23:40:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 244 transitions. [2023-11-28 23:40:53,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304347826086957 [2023-11-28 23:40:53,030 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 244 transitions. [2023-11-28 23:40:53,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 244 transitions. [2023-11-28 23:40:53,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:40:53,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 244 transitions. [2023-11-28 23:40:53,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:53,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:53,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 92.0) internal successors, (552), 6 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:53,036 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 186 flow. Second operand 5 states and 244 transitions. [2023-11-28 23:40:53,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 214 transitions, 883 flow [2023-11-28 23:40:53,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 214 transitions, 883 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:40:53,044 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 281 flow [2023-11-28 23:40:53,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2023-11-28 23:40:53,045 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 7 predicate places. [2023-11-28 23:40:53,045 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 281 flow [2023-11-28 23:40:53,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:53,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:40:53,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:40:53,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 23:40:53,045 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:40:53,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:40:53,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1119496573, now seen corresponding path program 1 times [2023-11-28 23:40:53,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:40:53,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855762987] [2023-11-28 23:40:53,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:40:53,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:40:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:40:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:40:53,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:40:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855762987] [2023-11-28 23:40:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855762987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:40:53,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:40:53,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:40:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888087890] [2023-11-28 23:40:53,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:40:53,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:40:53,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:40:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:40:53,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:40:53,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 92 [2023-11-28 23:40:53,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 281 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:40:53,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:40:53,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 92 [2023-11-28 23:40:53,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-28 23:41:11,567 INFO L124 PetriNetUnfolderBase]: 169328/227579 cut-off events. [2023-11-28 23:41:11,568 INFO L125 PetriNetUnfolderBase]: For 36603/36603 co-relation queries the response was YES. [2023-11-28 23:41:11,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488599 conditions, 227579 events. 169328/227579 cut-off events. For 36603/36603 co-relation queries the response was YES. Maximal size of possible extension queue 6881. Compared 1541057 event pairs, 27226 based on Foata normal form. 0/179786 useless extension candidates. Maximal degree in co-relation 488589. Up to 127448 conditions per place. [2023-11-28 23:41:12,740 INFO L140 encePairwiseOnDemand]: 78/92 looper letters, 425 selfloop transitions, 42 changer transitions 0/473 dead transitions. [2023-11-28 23:41:12,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 473 transitions, 2133 flow [2023-11-28 23:41:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:41:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-28 23:41:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 525 transitions. [2023-11-28 23:41:12,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2023-11-28 23:41:12,744 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 525 transitions. [2023-11-28 23:41:12,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 525 transitions. [2023-11-28 23:41:12,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-28 23:41:12,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 525 transitions. [2023-11-28 23:41:12,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 52.5) internal successors, (525), 10 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:41:12,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:41:12,752 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 92.0) internal successors, (1012), 11 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:41:12,752 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 281 flow. Second operand 10 states and 525 transitions. [2023-11-28 23:41:12,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 473 transitions, 2133 flow [2023-11-28 23:41:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 473 transitions, 2133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-28 23:41:12,809 INFO L231 Difference]: Finished difference. Result has 100 places, 129 transitions, 601 flow [2023-11-28 23:41:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=601, PETRI_PLACES=100, PETRI_TRANSITIONS=129} [2023-11-28 23:41:12,810 INFO L281 CegarLoopForPetriNet]: 78 programPoint places, 22 predicate places. [2023-11-28 23:41:12,810 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 129 transitions, 601 flow [2023-11-28 23:41:12,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:41:12,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:41:12,811 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-28 23:41:12,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 23:41:12,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-28 23:41:12,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:41:12,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1368134736, now seen corresponding path program 1 times [2023-11-28 23:41:12,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:41:12,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115471800] [2023-11-28 23:41:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:41:12,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:41:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:41:12,830 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-28 23:41:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-28 23:41:12,846 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-28 23:41:12,847 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-28 23:41:12,847 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-28 23:41:12,848 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-28 23:41:12,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-28 23:41:12,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-28 23:41:12,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-28 23:41:12,849 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-28 23:41:12,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-28 23:41:12,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-28 23:41:12,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-28 23:41:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 23:41:12,851 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-28 23:41:12,852 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-28 23:41:12,852 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-28 23:41:12,960 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-28 23:41:12,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 121 transitions, 270 flow [2023-11-28 23:41:12,986 INFO L124 PetriNetUnfolderBase]: 28/132 cut-off events. [2023-11-28 23:41:12,986 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-28 23:41:12,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 132 events. 28/132 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 502 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 115. Up to 5 conditions per place. [2023-11-28 23:41:12,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 121 transitions, 270 flow [2023-11-28 23:41:12,990 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 121 transitions, 270 flow [2023-11-28 23:41:12,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:41:12,992 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;@42997309, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:41:12,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-28 23:41:12,996 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-28 23:41:12,996 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-11-28 23:41:12,997 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-28 23:41:12,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-28 23:41:12,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:41:12,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-28 23:41:12,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:41:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1210460673, now seen corresponding path program 1 times [2023-11-28 23:41:12,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 23:41:12,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953196018] [2023-11-28 23:41:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:41:12,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 23:41:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:41:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:41:13,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 23:41:13,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953196018] [2023-11-28 23:41:13,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953196018] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:41:13,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:41:13,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:41:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948043457] [2023-11-28 23:41:13,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:41:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-28 23:41:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 23:41:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-28 23:41:13,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-28 23:41:13,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 121 [2023-11-28 23:41:13,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 121 transitions, 270 flow. Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:41:13,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-28 23:41:13,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 121 [2023-11-28 23:41:13,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand