./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 9bd2c7ff 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_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/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_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu --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-9bd2c7f [2023-11-19 08:01:21,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:21,713 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:01:21,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:21,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:21,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:21,742 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:21,743 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:21,744 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:21,745 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:21,746 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:21,746 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:21,747 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:21,748 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:21,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:01:21,749 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:21,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:21,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:21,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:21,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:01:21,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:21,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:01:21,754 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:21,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:01:21,755 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:21,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:21,757 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:21,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:21,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:21,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:21,759 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:21,760 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:01:21,760 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:21,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:21,761 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:21,762 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:01:21,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:21,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:21,763 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:21,764 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_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cabdc6d1ed2adbc421c41fcb971b1cf28c20678c065a4de58d9cc1e3842298d4 [2023-11-19 08:01:21,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:22,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:22,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:22,020 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:22,021 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:22,022 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-19 08:01:25,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:25,513 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:25,514 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2023-11-19 08:01:25,533 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/data/37bd5ffcc/2a0a0dbf50824db2a58923fd2a97fd91/FLAG1eefb4717 [2023-11-19 08:01:25,549 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/data/37bd5ffcc/2a0a0dbf50824db2a58923fd2a97fd91 [2023-11-19 08:01:25,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:25,554 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:25,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:25,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:25,561 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:25,562 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:25" (1/1) ... [2023-11-19 08:01:25,563 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce6ec28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:25, skipping insertion in model container [2023-11-19 08:01:25,563 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:25" (1/1) ... [2023-11-19 08:01:25,638 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:25,995 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_e543df82-4902-43d5-b071-6611fc5ecbfb/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-19 08:01:26,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:26,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:26,106 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_e543df82-4902-43d5-b071-6611fc5ecbfb/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31183,31196] [2023-11-19 08:01:26,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:26,170 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:01:26,170 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 08:01:26,178 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:26,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26 WrapperNode [2023-11-19 08:01:26,179 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:26,180 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:26,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:26,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:26,190 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,275 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2023-11-19 08:01:26,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:26,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:26,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:26,278 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:26,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,307 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,335 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,338 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,355 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:26,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:26,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:26,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:26,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:26,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:26,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e543df82-4902-43d5-b071-6611fc5ecbfb/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:26,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 08:01:26,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 08:01:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:26,459 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 08:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:26,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:26,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 08:01:26,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:26,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:26,463 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:26,615 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:26,618 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:26,944 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:27,150 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:27,151 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:01:27,154 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:27 BoogieIcfgContainer [2023-11-19 08:01:27,155 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:27,157 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:27,157 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:27,160 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:27,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:25" (1/3) ... [2023-11-19 08:01:27,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b73bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:27, skipping insertion in model container [2023-11-19 08:01:27,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (2/3) ... [2023-11-19 08:01:27,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b73bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:27, skipping insertion in model container [2023-11-19 08:01:27,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:27" (3/3) ... [2023-11-19 08:01:27,163 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2023-11-19 08:01:27,172 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 08:01:27,183 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:27,183 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:01:27,183 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:27,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:27,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,361 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-19 08:01:27,361 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:27,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 9/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-11-19 08:01:27,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,375 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,383 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:27,395 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,398 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 100 transitions, 204 flow [2023-11-19 08:01:27,457 INFO L124 PetriNetUnfolderBase]: 9/111 cut-off events. [2023-11-19 08:01:27,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:27,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 111 events. 9/111 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 112 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2023-11-19 08:01:27,463 INFO L119 LiptonReduction]: Number of co-enabled transitions 1848 [2023-11-19 08:01:31,779 INFO L134 LiptonReduction]: Checked pairs total: 1967 [2023-11-19 08:01:31,780 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-19 08:01:31,795 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:31,803 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;@3e5a9684, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:31,803 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 08:01:31,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:31,809 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-11-19 08:01:31,809 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:31,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:31,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:01:31,810 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:01:31,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash 281733516, now seen corresponding path program 1 times [2023-11-19 08:01:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:31,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302089278] [2023-11-19 08:01:31,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:31,949 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:31,995 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:31,997 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:31,999 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 08:01:32,001 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 08:01:32,002 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 08:01:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:32,003 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 08:01:32,007 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:32,007 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:01:32,069 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:32,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,161 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-19 08:01:32,162 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:32,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 191 events. 17/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-11-19 08:01:32,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,173 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:32,173 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 167 transitions, 344 flow [2023-11-19 08:01:32,236 INFO L124 PetriNetUnfolderBase]: 17/191 cut-off events. [2023-11-19 08:01:32,237 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:32,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 191 events. 17/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 355 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 145. Up to 6 conditions per place. [2023-11-19 08:01:32,250 INFO L119 LiptonReduction]: Number of co-enabled transitions 12540 [2023-11-19 08:01:37,156 INFO L134 LiptonReduction]: Checked pairs total: 25625 [2023-11-19 08:01:37,157 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-11-19 08:01:37,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:37,167 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;@3e5a9684, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:37,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 08:01:37,174 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:37,175 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-11-19 08:01:37,175 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:37,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:37,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:01:37,176 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)] === [2023-11-19 08:01:37,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1949702707, now seen corresponding path program 1 times [2023-11-19 08:01:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148534956] [2023-11-19 08:01:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:37,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:37,241 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:37,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:37,295 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:37,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 08:01:37,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 08:01:37,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 08:01:37,296 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 08:01:37,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:01:37,297 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 08:01:37,302 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:37,303 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:01:37,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:37,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,459 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-19 08:01:37,459 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:01:37,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 271 events. 25/271 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-11-19 08:01:37,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,470 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:37,470 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,471 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-11-19 08:01:37,547 INFO L124 PetriNetUnfolderBase]: 25/271 cut-off events. [2023-11-19 08:01:37,548 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:01:37,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 271 events. 25/271 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/239 useless extension candidates. Maximal degree in co-relation 211. Up to 8 conditions per place. [2023-11-19 08:01:37,575 INFO L119 LiptonReduction]: Number of co-enabled transitions 32076 [2023-11-19 08:01:44,142 INFO L134 LiptonReduction]: Checked pairs total: 71989 [2023-11-19 08:01:44,142 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-11-19 08:01:44,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:44,159 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;@3e5a9684, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:44,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 08:01:44,184 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:44,185 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2023-11-19 08:01:44,185 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:01:44,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:44,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:44,186 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:01:44,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:44,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1051739689, now seen corresponding path program 1 times [2023-11-19 08:01:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:44,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41580875] [2023-11-19 08:01:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:44,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:44,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:44,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41580875] [2023-11-19 08:01:44,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41580875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:44,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:44,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113728114] [2023-11-19 08:01:44,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:44,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:44,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:44,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:44,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 423 [2023-11-19 08:01:44,501 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) [2023-11-19 08:01:44,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:44,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 423 [2023-11-19 08:01:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:48,479 INFO L124 PetriNetUnfolderBase]: 17138/27304 cut-off events. [2023-11-19 08:01:48,479 INFO L125 PetriNetUnfolderBase]: For 1120/1120 co-relation queries the response was YES. [2023-11-19 08:01:48,542 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 212484 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. [2023-11-19 08:01:48,790 INFO L140 encePairwiseOnDemand]: 408/423 looper letters, 132 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2023-11-19 08:01:48,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 174 transitions, 687 flow [2023-11-19 08:01:48,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:01:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:01:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1078 transitions. [2023-11-19 08:01:48,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509692671394799 [2023-11-19 08:01:48,850 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1078 transitions. [2023-11-19 08:01:48,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1078 transitions. [2023-11-19 08:01:48,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:48,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1078 transitions. [2023-11-19 08:01:48,870 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) [2023-11-19 08:01:48,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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) [2023-11-19 08:01:48,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 423.0) internal successors, (2538), 6 states have internal predecessors, (2538), 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) [2023-11-19 08:01:48,888 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 186 flow. Second operand 5 states and 1078 transitions. [2023-11-19 08:01:48,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 174 transitions, 687 flow [2023-11-19 08:01:48,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 174 transitions, 679 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:48,900 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 288 flow [2023-11-19 08:01:48,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, 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} [2023-11-19 08:01:48,906 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 7 predicate places. [2023-11-19 08:01:48,906 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 288 flow [2023-11-19 08:01:48,907 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) [2023-11-19 08:01:48,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:48,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:01:48,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:01:48,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 08:01:48,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:48,909 INFO L85 PathProgramCache]: Analyzing trace with hash 266035299, now seen corresponding path program 1 times [2023-11-19 08:01:48,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:48,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565833400] [2023-11-19 08:01:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:48,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:49,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565833400] [2023-11-19 08:01:49,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565833400] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:49,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:49,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:49,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525200256] [2023-11-19 08:01:49,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:49,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:49,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:49,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 423 [2023-11-19 08:01:49,081 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) [2023-11-19 08:01:49,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:49,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 423 [2023-11-19 08:01:49,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:54,458 INFO L124 PetriNetUnfolderBase]: 25040/38269 cut-off events. [2023-11-19 08:01:54,458 INFO L125 PetriNetUnfolderBase]: For 15953/16543 co-relation queries the response was YES. [2023-11-19 08:01:54,541 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 293677 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. [2023-11-19 08:01:54,864 INFO L140 encePairwiseOnDemand]: 416/423 looper letters, 85 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2023-11-19 08:01:54,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 122 transitions, 584 flow [2023-11-19 08:01:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 638 transitions. [2023-11-19 08:01:54,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027580772261623 [2023-11-19 08:01:54,868 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 638 transitions. [2023-11-19 08:01:54,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 638 transitions. [2023-11-19 08:01:54,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:54,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 638 transitions. [2023-11-19 08:01:54,871 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) [2023-11-19 08:01:54,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-19 08:01:54,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 423.0) internal successors, (1692), 4 states have internal predecessors, (1692), 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) [2023-11-19 08:01:54,877 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 288 flow. Second operand 3 states and 638 transitions. [2023-11-19 08:01:54,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 122 transitions, 584 flow [2023-11-19 08:01:54,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 122 transitions, 584 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:54,902 INFO L231 Difference]: Finished difference. Result has 86 places, 95 transitions, 318 flow [2023-11-19 08:01:54,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=423, 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} [2023-11-19 08:01:54,904 INFO L281 CegarLoopForPetriNet]: 76 programPoint places, 10 predicate places. [2023-11-19 08:01:54,904 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 95 transitions, 318 flow [2023-11-19 08:01:54,905 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) [2023-11-19 08:01:54,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:54,906 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 08:01:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:01:54,906 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)] === [2023-11-19 08:01:54,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1906382156, now seen corresponding path program 1 times [2023-11-19 08:01:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58635159] [2023-11-19 08:01:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:54,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:54,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:01:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:01:54,962 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:01:54,962 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:01:54,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 08:01:54,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 08:01:54,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 08:01:54,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 08:01:54,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 08:01:54,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:01:54,970 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 08:01:54,971 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:01:54,971 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 08:01:55,045 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:01:55,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,120 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-19 08:01:55,121 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:01:55,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 351 events. 33/351 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1102 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 279. Up to 10 conditions per place. [2023-11-19 08:01:55,125 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,134 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,134 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:55,134 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 301 transitions, 630 flow [2023-11-19 08:01:55,200 INFO L124 PetriNetUnfolderBase]: 33/351 cut-off events. [2023-11-19 08:01:55,201 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:01:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 351 events. 33/351 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1102 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 279. Up to 10 conditions per place. [2023-11-19 08:01:55,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 60456 [2023-11-19 08:02:02,473 INFO L134 LiptonReduction]: Checked pairs total: 134046 [2023-11-19 08:02:02,474 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-19 08:02:02,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:02,477 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;@3e5a9684, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:02,478 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 08:02:02,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:02:02,487 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2023-11-19 08:02:02,487 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 08:02:02,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:02,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:02,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 08:02:02,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1147742816, now seen corresponding path program 1 times [2023-11-19 08:02:02,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278741291] [2023-11-19 08:02:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:02,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:02,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:02,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278741291] [2023-11-19 08:02:02,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278741291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:02,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:02,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:02,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832976076] [2023-11-19 08:02:02,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:02,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:02:02,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:02:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:02:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 536 [2023-11-19 08:02:02,610 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) [2023-11-19 08:02:02,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:02,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 536 [2023-11-19 08:02:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand