./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl --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 cabdc6d1ed2adbc421c41fcb971b1cf28c20678c065a4de58d9cc1e3842298d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:31:39,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:31:39,597 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:31:39,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:31:39,604 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:31:39,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:31:39,635 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:31:39,636 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:31:39,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:31:39,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:31:39,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:31:39,645 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:31:39,646 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:31:39,646 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:31:39,647 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:31:39,647 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:31:39,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:31:39,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:31:39,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:31:39,651 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:31:39,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:31:39,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:31:39,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:31:39,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:31:39,654 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:31:39,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:31:39,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:31:39,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:31:39,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:39,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:31:39,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:31:39,658 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:31:39,658 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:31:39,658 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:31:39,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:31:39,659 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:31:39,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:31:39,659 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:31:39,660 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:31:39,660 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_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cabdc6d1ed2adbc421c41fcb971b1cf28c20678c065a4de58d9cc1e3842298d4 [2023-11-12 02:31:40,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:31:40,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:31:40,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:31:40,077 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:31:40,077 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:31:40,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-12 02:31:43,255 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:31:43,599 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:31:43,600 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-12 02:31:43,616 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/data/847595461/5a7d97d62bd543a5b8337082e8a18c9e/FLAGfea6ae3f3 [2023-11-12 02:31:43,631 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/data/847595461/5a7d97d62bd543a5b8337082e8a18c9e [2023-11-12 02:31:43,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:31:43,635 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:31:43,636 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:43,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:31:43,642 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:31:43,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:43" (1/1) ... [2023-11-12 02:31:43,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac61c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:43, skipping insertion in model container [2023-11-12 02:31:43,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:31:43" (1/1) ... [2023-11-12 02:31:43,711 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:31:44,103 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_a5a485b8-e701-4d22-ac12-488229bcaf07/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-12 02:31:44,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:44,128 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:31:44,169 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_a5a485b8-e701-4d22-ac12-488229bcaf07/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-12 02:31:44,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:31:44,218 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:44,219 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:31:44,227 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:31:44,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44 WrapperNode [2023-11-12 02:31:44,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:31:44,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:44,230 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:31:44,230 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:31:44,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,277 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,317 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-12 02:31:44,318 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:31:44,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:31:44,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:31:44,319 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:31:44,328 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:31:44,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:31:44,402 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:31:44,402 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:31:44,403 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (1/1) ... [2023-11-12 02:31:44,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:31:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:31:44,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:31:44,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a485b8-e701-4d22-ac12-488229bcaf07/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:31:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:31:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:31:44,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:31:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:31:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:31:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:31:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:31:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:31:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:31:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:31:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:31:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:31:44,487 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:31:44,714 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:31:44,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:31:45,218 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:31:45,455 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:31:45,455 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:31:45,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:45 BoogieIcfgContainer [2023-11-12 02:31:45,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:31:45,463 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:31:45,463 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:31:45,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:31:45,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:31:43" (1/3) ... [2023-11-12 02:31:45,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147d503a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:45, skipping insertion in model container [2023-11-12 02:31:45,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:31:44" (2/3) ... [2023-11-12 02:31:45,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147d503a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:31:45, skipping insertion in model container [2023-11-12 02:31:45,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:31:45" (3/3) ... [2023-11-12 02:31:45,474 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2023-11-12 02:31:45,483 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:31:45,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:31:45,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:31:45,496 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:31:45,571 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:31:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,710 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-11-12 02:31:45,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:31:45,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 8/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-12 02:31:45,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,728 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:31:45,752 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 99 transitions, 202 flow [2023-11-12 02:31:45,803 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-11-12 02:31:45,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:31:45,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 110 events. 8/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 111 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-12 02:31:45,809 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-11-12 02:31:49,977 INFO L134 LiptonReduction]: Checked pairs total: 1942 [2023-11-12 02:31:49,977 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-12 02:31:50,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:31:50,011 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;@1fae6faf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:31:50,012 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-12 02:31:50,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:31:50,023 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-12 02:31:50,023 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:31:50,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:50,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:31:50,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:31:50,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:50,031 INFO L85 PathProgramCache]: Analyzing trace with hash 137633456, now seen corresponding path program 1 times [2023-11-12 02:31:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380368513] [2023-11-12 02:31:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:31:50,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:31:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:31:50,268 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:31:50,269 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:31:50,271 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-12 02:31:50,273 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-12 02:31:50,274 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-12 02:31:50,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:31:50,275 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:31:50,280 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:31:50,280 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:31:50,348 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:31:50,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,442 INFO L124 PetriNetUnfolderBase]: 15/189 cut-off events. [2023-11-12 02:31:50,443 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:31:50,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 15/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-12 02:31:50,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,452 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:31:50,453 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,453 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 165 transitions, 340 flow [2023-11-12 02:31:50,504 INFO L124 PetriNetUnfolderBase]: 15/189 cut-off events. [2023-11-12 02:31:50,505 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:31:50,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 15/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 143. Up to 6 conditions per place. [2023-11-12 02:31:50,518 INFO L119 LiptonReduction]: Number of co-enabled transitions 12220 [2023-11-12 02:31:55,615 INFO L134 LiptonReduction]: Checked pairs total: 25358 [2023-11-12 02:31:55,616 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-11-12 02:31:55,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:31:55,630 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;@1fae6faf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:31:55,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-12 02:31:55,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:31:55,638 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-12 02:31:55,639 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:31:55,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:31:55,639 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:31:55,640 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)] === [2023-11-12 02:31:55,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:31:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2063014522, now seen corresponding path program 1 times [2023-11-12 02:31:55,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:31:55,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349655191] [2023-11-12 02:31:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:31:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:31:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:31:55,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:31:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:31:55,742 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:31:55,743 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:31:55,743 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-12 02:31:55,743 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-12 02:31:55,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-12 02:31:55,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-12 02:31:55,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:31:55,744 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:31:55,745 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:31:55,745 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:31:55,807 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:31:55,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,866 INFO L124 PetriNetUnfolderBase]: 22/268 cut-off events. [2023-11-12 02:31:55,866 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:31:55,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 22/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 703 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-12 02:31:55,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,875 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:31:55,876 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,876 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 231 transitions, 480 flow [2023-11-12 02:31:55,928 INFO L124 PetriNetUnfolderBase]: 22/268 cut-off events. [2023-11-12 02:31:55,928 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:31:55,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 268 events. 22/268 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 703 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 208. Up to 8 conditions per place. [2023-11-12 02:31:55,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 31200 [2023-11-12 02:32:02,644 INFO L134 LiptonReduction]: Checked pairs total: 65219 [2023-11-12 02:32:02,644 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-12 02:32:02,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:02,648 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;@1fae6faf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:02,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:32:02,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:02,655 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2023-11-12 02:32:02,655 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:32:02,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:02,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:02,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:32:02,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:02,656 INFO L85 PathProgramCache]: Analyzing trace with hash -344740626, now seen corresponding path program 1 times [2023-11-12 02:32:02,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:02,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401267879] [2023-11-12 02:32:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:02,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:02,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:02,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401267879] [2023-11-12 02:32:02,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401267879] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:02,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:02,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:02,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132951636] [2023-11-12 02:32:02,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:02,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:02,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:02,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 414 [2023-11-12 02:32:02,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 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) [2023-11-12 02:32:02,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:02,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 414 [2023-11-12 02:32:02,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:07,126 INFO L124 PetriNetUnfolderBase]: 17138/27304 cut-off events. [2023-11-12 02:32:07,126 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2023-11-12 02:32:07,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50639 conditions, 27304 events. 17138/27304 cut-off events. For 1120/1120 co-relation queries the response was YES. Maximal size of possible extension queue 1148. Compared 212443 event pairs, 2864 based on Foata normal form. 0/21707 useless extension candidates. Maximal degree in co-relation 25340. Up to 14594 conditions per place. [2023-11-12 02:32:07,403 INFO L140 encePairwiseOnDemand]: 399/414 looper letters, 132 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2023-11-12 02:32:07,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 687 flow [2023-11-12 02:32:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:32:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:32:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-11-12 02:32:07,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5207729468599034 [2023-11-12 02:32:07,431 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-11-12 02:32:07,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-11-12 02:32:07,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:07,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-11-12 02:32:07,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 215.6) internal successors, (1078), 5 states have internal predecessors, (1078), 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) [2023-11-12 02:32:07,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 414.0) internal successors, (2484), 6 states have internal predecessors, (2484), 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) [2023-11-12 02:32:07,465 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 414.0) internal successors, (2484), 6 states have internal predecessors, (2484), 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) [2023-11-12 02:32:07,467 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 186 flow. Second operand 5 states and 1078 transitions. [2023-11-12 02:32:07,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 687 flow [2023-11-12 02:32:07,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 679 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:07,484 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 288 flow [2023-11-12 02:32:07,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2023-11-12 02:32:07,491 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2023-11-12 02:32:07,491 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 288 flow [2023-11-12 02:32:07,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 185.75) internal successors, (743), 4 states have internal predecessors, (743), 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) [2023-11-12 02:32:07,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:07,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:07,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:32:07,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:32:07,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:07,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1930338792, now seen corresponding path program 1 times [2023-11-12 02:32:07,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:07,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092665536] [2023-11-12 02:32:07,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:07,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092665536] [2023-11-12 02:32:07,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092665536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:07,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:07,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:32:07,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392162299] [2023-11-12 02:32:07,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:07,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:32:07,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:07,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:32:07,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:32:07,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 414 [2023-11-12 02:32:07,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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) [2023-11-12 02:32:07,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:07,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 414 [2023-11-12 02:32:07,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:12,434 INFO L124 PetriNetUnfolderBase]: 25040/38269 cut-off events. [2023-11-12 02:32:12,434 INFO L125 PetriNetUnfolderBase]: For 15953/16543 co-relation queries the response was YES. [2023-11-12 02:32:12,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82899 conditions, 38269 events. 25040/38269 cut-off events. For 15953/16543 co-relation queries the response was YES. Maximal size of possible extension queue 1861. Compared 293928 event pairs, 5084 based on Foata normal form. 790/33183 useless extension candidates. Maximal degree in co-relation 37408. Up to 29815 conditions per place. [2023-11-12 02:32:12,879 INFO L140 encePairwiseOnDemand]: 407/414 looper letters, 85 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2023-11-12 02:32:12,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 122 transitions, 584 flow [2023-11-12 02:32:12,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:32:12,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:32:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-11-12 02:32:12,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136876006441223 [2023-11-12 02:32:12,884 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-11-12 02:32:12,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-11-12 02:32:12,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:12,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-11-12 02:32:12,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 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) [2023-11-12 02:32:12,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 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) [2023-11-12 02:32:12,895 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 414.0) internal successors, (1656), 4 states have internal predecessors, (1656), 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) [2023-11-12 02:32:12,895 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 288 flow. Second operand 3 states and 638 transitions. [2023-11-12 02:32:12,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 122 transitions, 584 flow [2023-11-12 02:32:12,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:12,922 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 318 flow [2023-11-12 02:32:12,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=414, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=86, PETRI_TRANSITIONS=95} [2023-11-12 02:32:12,925 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-12 02:32:12,926 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 318 flow [2023-11-12 02:32:12,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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) [2023-11-12 02:32:12,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:12,927 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:32:12,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:32:12,928 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-12 02:32:12,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:12,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2113507172, now seen corresponding path program 1 times [2023-11-12 02:32:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:12,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11491471] [2023-11-12 02:32:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:12,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:12,967 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:13,004 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:13,010 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:13,012 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:32:13,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:32:13,012 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:32:13,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:32:13,018 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:32:13,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:32:13,018 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:32:13,019 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:13,020 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:32:13,121 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:32:13,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,238 INFO L124 PetriNetUnfolderBase]: 29/347 cut-off events. [2023-11-12 02:32:13,239 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:32:13,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 347 events. 29/347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1098 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 276. Up to 10 conditions per place. [2023-11-12 02:32:13,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,259 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:13,259 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,259 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 297 transitions, 622 flow [2023-11-12 02:32:13,495 INFO L124 PetriNetUnfolderBase]: 29/347 cut-off events. [2023-11-12 02:32:13,496 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:32:13,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 347 events. 29/347 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1098 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 276. Up to 10 conditions per place. [2023-11-12 02:32:13,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 58760 [2023-11-12 02:32:21,919 INFO L134 LiptonReduction]: Checked pairs total: 131632 [2023-11-12 02:32:21,920 INFO L136 LiptonReduction]: Total number of compositions: 230 [2023-11-12 02:32:21,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:21,923 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;@1fae6faf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:21,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-12 02:32:21,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:21,936 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2023-11-12 02:32:21,937 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:32:21,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:21,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:32:21,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-12 02:32:21,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1385509255, now seen corresponding path program 1 times [2023-11-12 02:32:21,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:21,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011136087] [2023-11-12 02:32:21,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:21,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:32:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011136087] [2023-11-12 02:32:22,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011136087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:32:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591992415] [2023-11-12 02:32:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:32:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:22,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:32:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:32:22,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 527 [2023-11-12 02:32:22,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 238.75) internal successors, (955), 4 states have internal predecessors, (955), 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) [2023-11-12 02:32:22,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:22,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 527 [2023-11-12 02:32:22,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand