./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/01b_inc-pthread.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_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/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_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/01b_inc-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/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_7f8cacc0-d800-436a-b473-f95130618242/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 5fad6244fcf6eaf8307cc493ab8f193eacc838ad9166f53316e6259a46f1eed1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:34:57,193 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:34:57,309 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 22:34:57,321 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:34:57,321 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:34:57,367 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:34:57,368 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:34:57,369 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:34:57,370 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 22:34:57,375 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 22:34:57,375 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:34:57,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:34:57,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:34:57,379 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:34:57,379 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:34:57,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:34:57,380 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 22:34:57,380 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:34:57,381 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:34:57,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:34:57,382 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:34:57,382 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 22:34:57,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:34:57,383 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 22:34:57,383 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:34:57,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 22:34:57,384 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:34:57,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:34:57,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:34:57,386 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:34:57,387 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:34:57,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:34:57,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:34:57,388 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:34:57,388 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 22:34:57,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:34:57,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:34:57,388 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:34:57,389 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:34:57,389 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 22:34:57,389 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:34:57,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:34:57,390 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_7f8cacc0-d800-436a-b473-f95130618242/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fad6244fcf6eaf8307cc493ab8f193eacc838ad9166f53316e6259a46f1eed1 [2023-11-23 22:34:57,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:34:57,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:34:57,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:34:57,734 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:34:57,735 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:34:57,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/pthread-ext/01b_inc-pthread.i [2023-11-23 22:35:01,000 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:35:01,243 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:35:01,244 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/sv-benchmarks/c/pthread-ext/01b_inc-pthread.i [2023-11-23 22:35:01,271 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/data/6806fea3d/e04e3e97639c4a50bd3b6d2552c159eb/FLAG13cf0bc98 [2023-11-23 22:35:01,295 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/data/6806fea3d/e04e3e97639c4a50bd3b6d2552c159eb [2023-11-23 22:35:01,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:35:01,301 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:35:01,305 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:01,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:35:01,311 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:35:01,315 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef1833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01, skipping insertion in model container [2023-11-23 22:35:01,316 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,394 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:35:01,787 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_7f8cacc0-d800-436a-b473-f95130618242/sv-benchmarks/c/pthread-ext/01b_inc-pthread.i[30747,30760] [2023-11-23 22:35:01,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:01,812 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:35:01,854 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_7f8cacc0-d800-436a-b473-f95130618242/sv-benchmarks/c/pthread-ext/01b_inc-pthread.i[30747,30760] [2023-11-23 22:35:01,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:35:01,890 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:35:01,890 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 22:35:01,898 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:35:01,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01 WrapperNode [2023-11-23 22:35:01,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:35:01,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:01,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:35:01,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:35:01,908 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,921 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,942 INFO L138 Inliner]: procedures = 164, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2023-11-23 22:35:01,942 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:35:01,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:35:01,943 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:35:01,943 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:35:01,955 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:01,974 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,002 INFO L189 HeapSplitter]: Split 8 memory accesses to 3 slices as follows [2, 5, 1] [2023-11-23 22:35:02,002 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,017 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,021 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,022 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,027 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:35:02,028 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:35:02,028 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:35:02,028 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:35:02,029 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (1/1) ... [2023-11-23 22:35:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:35:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:35:02,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:35:02,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7f8cacc0-d800-436a-b473-f95130618242/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:35:02,133 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-23 22:35:02,133 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 22:35:02,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 22:35:02,135 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-23 22:35:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:35:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:35:02,138 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 22:35:02,280 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:35:02,282 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:35:02,448 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:35:02,561 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:35:02,562 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 22:35:02,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:02 BoogieIcfgContainer [2023-11-23 22:35:02,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:35:02,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:35:02,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:35:02,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:35:02,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:35:01" (1/3) ... [2023-11-23 22:35:02,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7009de55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:02, skipping insertion in model container [2023-11-23 22:35:02,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:01" (2/3) ... [2023-11-23 22:35:02,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7009de55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:02, skipping insertion in model container [2023-11-23 22:35:02,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:02" (3/3) ... [2023-11-23 22:35:02,580 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc-pthread.i [2023-11-23 22:35:02,588 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-23 22:35:02,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:35:02,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 22:35:02,598 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 22:35:02,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:35:02,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 20 transitions, 44 flow [2023-11-23 22:35:02,703 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2023-11-23 22:35:02,704 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:35:02,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 22 events. 1/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2023-11-23 22:35:02,708 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 20 transitions, 44 flow [2023-11-23 22:35:02,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 20 transitions, 44 flow [2023-11-23 22:35:02,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:02,731 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;@686d4e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:02,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-23 22:35:02,738 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:35:02,739 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-23 22:35:02,739 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 22:35:02,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:02,740 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-23 22:35:02,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 22:35:02,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:02,746 INFO L85 PathProgramCache]: Analyzing trace with hash 457546725, now seen corresponding path program 1 times [2023-11-23 22:35:02,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:02,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406976138] [2023-11-23 22:35:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:02,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:02,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:35:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:02,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:35:02,942 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:35:02,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-23 22:35:02,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-23 22:35:02,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-23 22:35:02,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:35:02,948 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 22:35:02,952 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:35:02,952 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 22:35:02,979 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:35:02,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 35 transitions, 80 flow [2023-11-23 22:35:02,996 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-11-23 22:35:02,996 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:35:02,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 40 events. 2/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 83 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 31. Up to 3 conditions per place. [2023-11-23 22:35:02,998 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 35 transitions, 80 flow [2023-11-23 22:35:02,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 35 transitions, 80 flow [2023-11-23 22:35:03,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:03,007 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;@686d4e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:03,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 22:35:03,016 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:35:03,016 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-11-23 22:35:03,016 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-23 22:35:03,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:03,017 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-23 22:35:03,017 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-23 22:35:03,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2140217933, now seen corresponding path program 1 times [2023-11-23 22:35:03,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:03,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779304884] [2023-11-23 22:35:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:03,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:03,053 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:35:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:03,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:35:03,084 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:35:03,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-23 22:35:03,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-23 22:35:03,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-23 22:35:03,085 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-23 22:35:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:35:03,086 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 22:35:03,087 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:35:03,087 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-23 22:35:03,116 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:35:03,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 50 transitions, 118 flow [2023-11-23 22:35:03,144 INFO L124 PetriNetUnfolderBase]: 3/58 cut-off events. [2023-11-23 22:35:03,147 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-23 22:35:03,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 58 events. 3/58 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 47. Up to 4 conditions per place. [2023-11-23 22:35:03,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 50 transitions, 118 flow [2023-11-23 22:35:03,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 50 transitions, 118 flow [2023-11-23 22:35:03,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:03,164 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;@686d4e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:03,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-23 22:35:03,187 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:35:03,190 INFO L124 PetriNetUnfolderBase]: 0/30 cut-off events. [2023-11-23 22:35:03,190 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-23 22:35:03,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:03,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:03,191 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 22:35:03,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1633164923, now seen corresponding path program 1 times [2023-11-23 22:35:03,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:03,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585454277] [2023-11-23 22:35:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:03,666 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 22:35:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585454277] [2023-11-23 22:35:03,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585454277] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:03,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:03,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:03,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415705545] [2023-11-23 22:35:03,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:03,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:03,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2023-11-23 22:35:03,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 22:35:03,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:03,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2023-11-23 22:35:03,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:06,482 INFO L124 PetriNetUnfolderBase]: 11367/19206 cut-off events. [2023-11-23 22:35:06,482 INFO L125 PetriNetUnfolderBase]: For 706/706 co-relation queries the response was YES. [2023-11-23 22:35:06,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35951 conditions, 19206 events. 11367/19206 cut-off events. For 706/706 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 156365 event pairs, 3321 based on Foata normal form. 0/16619 useless extension candidates. Maximal degree in co-relation 19822. Up to 7422 conditions per place. [2023-11-23 22:35:06,719 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 104 selfloop transitions, 12 changer transitions 0/129 dead transitions. [2023-11-23 22:35:06,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 129 transitions, 546 flow [2023-11-23 22:35:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 205 transitions. [2023-11-23 22:35:06,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2023-11-23 22:35:06,737 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 205 transitions. [2023-11-23 22:35:06,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 205 transitions. [2023-11-23 22:35:06,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:06,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 205 transitions. [2023-11-23 22:35:06,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 34.166666666666664) internal successors, (205), 6 states have internal predecessors, (205), 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 22:35:06,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 22:35:06,750 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 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 22:35:06,753 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 118 flow. Second operand 6 states and 205 transitions. [2023-11-23 22:35:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 129 transitions, 546 flow [2023-11-23 22:35:06,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 129 transitions, 536 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-23 22:35:06,763 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 205 flow [2023-11-23 22:35:06,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=205, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-11-23 22:35:06,769 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 8 predicate places. [2023-11-23 22:35:06,769 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 205 flow [2023-11-23 22:35:06,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 22:35:06,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:06,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-23 22:35:06,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:35:06,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-23 22:35:06,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1584321508, now seen corresponding path program 1 times [2023-11-23 22:35:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:06,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218805679] [2023-11-23 22:35:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:06,796 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 22:35:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 22:35:06,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 22:35:06,816 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 22:35:06,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-23 22:35:06,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-23 22:35:06,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-23 22:35:06,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-23 22:35:06,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-23 22:35:06,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:35:06,818 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-23 22:35:06,819 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 22:35:06,819 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-23 22:35:06,857 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-23 22:35:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 65 transitions, 158 flow [2023-11-23 22:35:06,875 INFO L124 PetriNetUnfolderBase]: 4/76 cut-off events. [2023-11-23 22:35:06,876 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-23 22:35:06,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 76 events. 4/76 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 224 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 70. Up to 5 conditions per place. [2023-11-23 22:35:06,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 65 transitions, 158 flow [2023-11-23 22:35:06,878 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 65 transitions, 158 flow [2023-11-23 22:35:06,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:35:06,881 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;@686d4e45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:35:06,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-23 22:35:06,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 22:35:06,888 INFO L124 PetriNetUnfolderBase]: 0/35 cut-off events. [2023-11-23 22:35:06,888 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-23 22:35:06,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:06,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:06,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 22:35:06,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash -469511382, now seen corresponding path program 1 times [2023-11-23 22:35:06,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:06,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284440301] [2023-11-23 22:35:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:06,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:07,059 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 22:35:07,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:07,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284440301] [2023-11-23 22:35:07,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284440301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:07,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:07,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:07,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474328916] [2023-11-23 22:35:07,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:07,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:07,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:07,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 65 [2023-11-23 22:35:07,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 158 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 22:35:07,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:07,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 65 [2023-11-23 22:35:07,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 22:35:33,921 INFO L124 PetriNetUnfolderBase]: 207509/303710 cut-off events. [2023-11-23 22:35:33,922 INFO L125 PetriNetUnfolderBase]: For 16564/16564 co-relation queries the response was YES. [2023-11-23 22:35:34,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580116 conditions, 303710 events. 207509/303710 cut-off events. For 16564/16564 co-relation queries the response was YES. Maximal size of possible extension queue 12236. Compared 2720284 event pairs, 70548 based on Foata normal form. 0/257898 useless extension candidates. Maximal degree in co-relation 131702. Up to 133343 conditions per place. [2023-11-23 22:35:36,569 INFO L140 encePairwiseOnDemand]: 52/65 looper letters, 144 selfloop transitions, 15 changer transitions 0/176 dead transitions. [2023-11-23 22:35:36,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 176 transitions, 772 flow [2023-11-23 22:35:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:35:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 22:35:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 274 transitions. [2023-11-23 22:35:36,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7025641025641025 [2023-11-23 22:35:36,579 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 274 transitions. [2023-11-23 22:35:36,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 274 transitions. [2023-11-23 22:35:36,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 22:35:36,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 274 transitions. [2023-11-23 22:35:36,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 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 22:35:36,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 65.0) internal successors, (455), 7 states have internal predecessors, (455), 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 22:35:36,590 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 65.0) internal successors, (455), 7 states have internal predecessors, (455), 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 22:35:36,590 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 158 flow. Second operand 6 states and 274 transitions. [2023-11-23 22:35:36,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 176 transitions, 772 flow [2023-11-23 22:35:36,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 176 transitions, 742 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-23 22:35:36,617 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 268 flow [2023-11-23 22:35:36,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=268, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-11-23 22:35:36,620 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 8 predicate places. [2023-11-23 22:35:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 268 flow [2023-11-23 22:35:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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 22:35:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 22:35:36,621 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:35:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:35:36,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-23 22:35:36,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:35:36,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1225321965, now seen corresponding path program 1 times [2023-11-23 22:35:36,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:35:36,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063093379] [2023-11-23 22:35:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:35:36,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:35:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:35:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:35:36,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:35:36,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063093379] [2023-11-23 22:35:36,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063093379] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:35:36,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:35:36,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:35:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99663215] [2023-11-23 22:35:36,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:35:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:35:36,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:35:36,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:35:36,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:35:36,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 65 [2023-11-23 22:35:36,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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 22:35:36,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 22:35:36,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 65 [2023-11-23 22:35:36,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand