./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/03_incdec.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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/03_incdec.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/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 c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:32:44,284 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:32:44,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:32:44,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:32:44,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:32:44,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:32:44,392 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:32:44,392 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:32:44,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:32:44,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:32:44,394 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:32:44,395 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:32:44,395 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:32:44,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:32:44,397 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:32:44,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:32:44,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:32:44,398 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:32:44,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:32:44,400 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:32:44,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:32:44,401 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:32:44,402 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:32:44,402 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:32:44,403 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:32:44,403 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:32:44,404 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:32:44,404 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:32:44,405 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:44,405 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:32:44,406 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:32:44,406 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:32:44,407 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:32:44,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:32:44,407 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:32:44,408 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:32:44,408 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:32:44,409 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:32:44,409 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:32:44,409 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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c717c54832d7b18d55a1459c6f740661389c67176a032001ce64e3c282b955 [2023-11-12 02:32:44,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:32:44,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:32:44,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:32:44,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:32:44,690 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:32:44,692 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/03_incdec.i [2023-11-12 02:32:47,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:32:48,247 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:32:48,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/sv-benchmarks/c/pthread-ext/03_incdec.i [2023-11-12 02:32:48,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/data/b0c0ae5b6/0a3e803166da442996b71a0d552c80bc/FLAG589a35688 [2023-11-12 02:32:48,278 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/data/b0c0ae5b6/0a3e803166da442996b71a0d552c80bc [2023-11-12 02:32:48,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:32:48,282 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:32:48,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:48,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:32:48,290 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:32:48,291 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,292 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fac86e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48, skipping insertion in model container [2023-11-12 02:32:48,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:32:48,715 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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2023-11-12 02:32:48,726 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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2023-11-12 02:32:48,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:48,748 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:32:48,811 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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/sv-benchmarks/c/pthread-ext/03_incdec.i[30534,30547] [2023-11-12 02:32:48,821 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_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/sv-benchmarks/c/pthread-ext/03_incdec.i[30928,30941] [2023-11-12 02:32:48,825 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:32:48,868 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:32:48,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48 WrapperNode [2023-11-12 02:32:48,869 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:32:48,870 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:48,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:32:48,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:32:48,878 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,921 INFO L138 Inliner]: procedures = 172, calls = 24, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 133 [2023-11-12 02:32:48,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:32:48,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:32:48,923 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:32:48,923 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:32:48,932 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,952 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,952 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,958 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,975 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:48,998 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:32:48,999 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:32:48,999 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:32:48,999 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:32:49,000 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (1/1) ... [2023-11-12 02:32:49,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:32:49,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:32:49,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:32:49,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_700f993d-06d6-4cbf-83e9-d7ceed62eb7f/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:32:49,155 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:32:49,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:32:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:32:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:32:49,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:32:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:32:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:32:49,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:32:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:32:49,161 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 02:32:49,302 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:32:49,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:32:49,617 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:32:49,747 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:32:49,747 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:32:49,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:49 BoogieIcfgContainer [2023-11-12 02:32:49,756 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:32:49,758 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:32:49,758 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:32:49,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:32:49,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:32:48" (1/3) ... [2023-11-12 02:32:49,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790b2a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:49, skipping insertion in model container [2023-11-12 02:32:49,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:32:48" (2/3) ... [2023-11-12 02:32:49,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@790b2a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:32:49, skipping insertion in model container [2023-11-12 02:32:49,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:32:49" (3/3) ... [2023-11-12 02:32:49,769 INFO L112 eAbstractionObserver]: Analyzing ICFG 03_incdec.i [2023-11-12 02:32:49,780 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:32:49,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:32:49,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 02:32:49,793 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:32:49,890 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:32:49,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,011 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-12 02:32:50,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:50,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-12 02:32:50,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:50,048 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 83 transitions, 170 flow [2023-11-12 02:32:50,090 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2023-11-12 02:32:50,090 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:50,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 7/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 68. Up to 4 conditions per place. [2023-11-12 02:32:50,095 INFO L119 LiptonReduction]: Number of co-enabled transitions 1540 [2023-11-12 02:32:55,552 INFO L134 LiptonReduction]: Checked pairs total: 1514 [2023-11-12 02:32:55,553 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-11-12 02:32:55,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:55,578 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;@37c045b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:55,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-12 02:32:55,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:55,583 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-12 02:32:55,583 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:55,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:55,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:32:55,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:32:55,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:55,591 INFO L85 PathProgramCache]: Analyzing trace with hash 18786765, now seen corresponding path program 1 times [2023-11-12 02:32:55,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:55,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244286843] [2023-11-12 02:32:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:55,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:32:55,819 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 02:32:55,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:32:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244286843] [2023-11-12 02:32:55,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244286843] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:32:55,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:32:55,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:32:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176572083] [2023-11-12 02:32:55,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:32:55,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:32:55,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:32:55,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:32:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:32:55,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 193 [2023-11-12 02:32:55,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 9 transitions, 22 flow. Second operand has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 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 02:32:55,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:32:55,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 193 [2023-11-12 02:32:55,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:32:55,932 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-12 02:32:55,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:32:55,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-11-12 02:32:55,935 INFO L140 encePairwiseOnDemand]: 190/193 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-11-12 02:32:55,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 26 flow [2023-11-12 02:32:55,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:32:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:32:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 140 transitions. [2023-11-12 02:32:55,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3626943005181347 [2023-11-12 02:32:55,958 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 140 transitions. [2023-11-12 02:32:55,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 140 transitions. [2023-11-12 02:32:55,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:32:55,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 140 transitions. [2023-11-12 02:32:55,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 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 02:32:55,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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 02:32:55,978 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 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 02:32:55,981 INFO L175 Difference]: Start difference. First operand has 12 places, 9 transitions, 22 flow. Second operand 2 states and 140 transitions. [2023-11-12 02:32:55,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 26 flow [2023-11-12 02:32:55,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 26 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:32:55,985 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 16 flow [2023-11-12 02:32:55,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=16, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-11-12 02:32:55,993 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -2 predicate places. [2023-11-12 02:32:55,993 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 16 flow [2023-11-12 02:32:55,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 68.0) internal successors, (136), 2 states have internal predecessors, (136), 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 02:32:55,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:55,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:32:55,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:32:55,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-12 02:32:56,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:56,002 INFO L85 PathProgramCache]: Analyzing trace with hash 874153935, now seen corresponding path program 1 times [2023-11-12 02:32:56,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708188190] [2023-11-12 02:32:56,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:56,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:56,031 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:56,071 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:56,072 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:56,074 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-12 02:32:56,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-12 02:32:56,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-12 02:32:56,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-12 02:32:56,082 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-12 02:32:56,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:32:56,082 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:32:56,085 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:56,085 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:32:56,123 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:32:56,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,165 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-11-12 02:32:56,165 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:56,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 518 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-11-12 02:32:56,169 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,171 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,171 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:56,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 139 transitions, 288 flow [2023-11-12 02:32:56,203 INFO L124 PetriNetUnfolderBase]: 13/163 cut-off events. [2023-11-12 02:32:56,203 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:56,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 163 events. 13/163 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 518 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 123. Up to 6 conditions per place. [2023-11-12 02:32:56,213 INFO L119 LiptonReduction]: Number of co-enabled transitions 9240 [2023-11-12 02:32:59,410 INFO L134 LiptonReduction]: Checked pairs total: 29603 [2023-11-12 02:32:59,410 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-12 02:32:59,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:32:59,415 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;@37c045b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:32:59,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-12 02:32:59,424 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:32:59,424 INFO L124 PetriNetUnfolderBase]: 3/43 cut-off events. [2023-11-12 02:32:59,425 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:32:59,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:32:59,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:32:59,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-12 02:32:59,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:32:59,426 INFO L85 PathProgramCache]: Analyzing trace with hash 278711663, now seen corresponding path program 1 times [2023-11-12 02:32:59,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:32:59,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505945529] [2023-11-12 02:32:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:32:59,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:32:59,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:59,456 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:32:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:32:59,483 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:32:59,484 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:32:59,484 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-12 02:32:59,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-12 02:32:59,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-12 02:32:59,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-12 02:32:59,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-12 02:32:59,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-12 02:32:59,486 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-12 02:32:59,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:32:59,487 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-12 02:32:59,488 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:32:59,488 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:32:59,532 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:32:59,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,589 INFO L124 PetriNetUnfolderBase]: 19/232 cut-off events. [2023-11-12 02:32:59,590 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:32:59,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 19/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 851 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-12 02:32:59,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,599 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:32:59,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,600 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 195 transitions, 408 flow [2023-11-12 02:32:59,645 INFO L124 PetriNetUnfolderBase]: 19/232 cut-off events. [2023-11-12 02:32:59,645 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:32:59,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 232 events. 19/232 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 851 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 178. Up to 8 conditions per place. [2023-11-12 02:32:59,667 INFO L119 LiptonReduction]: Number of co-enabled transitions 23100 [2023-11-12 02:33:03,817 INFO L134 LiptonReduction]: Checked pairs total: 87663 [2023-11-12 02:33:03,817 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-11-12 02:33:03,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:03,821 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;@37c045b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:03,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-12 02:33:03,827 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:03,827 INFO L124 PetriNetUnfolderBase]: 5/50 cut-off events. [2023-11-12 02:33:03,827 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:33:03,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:03,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:03,828 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:33:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 160125314, now seen corresponding path program 1 times [2023-11-12 02:33:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629394413] [2023-11-12 02:33:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:03,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:04,056 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 02:33:04,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:04,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629394413] [2023-11-12 02:33:04,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629394413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:04,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:04,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:04,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360182973] [2023-11-12 02:33:04,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:04,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:04,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:04,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:04,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:04,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 354 [2023-11-12 02:33:04,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 02:33:04,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:04,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 354 [2023-11-12 02:33:04,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:06,804 INFO L124 PetriNetUnfolderBase]: 12431/18666 cut-off events. [2023-11-12 02:33:06,805 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2023-11-12 02:33:06,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36355 conditions, 18666 events. 12431/18666 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 1081. Compared 131627 event pairs, 5709 based on Foata normal form. 228/17559 useless extension candidates. Maximal degree in co-relation 8957. Up to 16663 conditions per place. [2023-11-12 02:33:06,993 INFO L140 encePairwiseOnDemand]: 338/354 looper letters, 65 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-11-12 02:33:06,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 358 flow [2023-11-12 02:33:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:33:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 487 transitions. [2023-11-12 02:33:07,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585687382297552 [2023-11-12 02:33:07,001 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 487 transitions. [2023-11-12 02:33:07,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 487 transitions. [2023-11-12 02:33:07,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:07,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 487 transitions. [2023-11-12 02:33:07,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 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 02:33:07,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 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 02:33:07,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 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 02:33:07,010 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 200 flow. Second operand 3 states and 487 transitions. [2023-11-12 02:33:07,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 358 flow [2023-11-12 02:33:07,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 354 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-12 02:33:07,016 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 212 flow [2023-11-12 02:33:07,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2023-11-12 02:33:07,018 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2023-11-12 02:33:07,018 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 212 flow [2023-11-12 02:33:07,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 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 02:33:07,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:07,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:33:07,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:33:07,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash 878108006, now seen corresponding path program 1 times [2023-11-12 02:33:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:07,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935914647] [2023-11-12 02:33:07,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:07,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:07,304 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 02:33:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935914647] [2023-11-12 02:33:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935914647] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:07,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:07,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:07,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646672430] [2023-11-12 02:33:07,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:07,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:33:07,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:33:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:07,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 354 [2023-11-12 02:33:07,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 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 02:33:07,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:07,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 354 [2023-11-12 02:33:07,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:33:11,863 INFO L124 PetriNetUnfolderBase]: 20381/30793 cut-off events. [2023-11-12 02:33:11,864 INFO L125 PetriNetUnfolderBase]: For 3457/3457 co-relation queries the response was YES. [2023-11-12 02:33:11,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63289 conditions, 30793 events. 20381/30793 cut-off events. For 3457/3457 co-relation queries the response was YES. Maximal size of possible extension queue 1780. Compared 232645 event pairs, 6523 based on Foata normal form. 494/29512 useless extension candidates. Maximal degree in co-relation 45204. Up to 15245 conditions per place. [2023-11-12 02:33:12,113 INFO L140 encePairwiseOnDemand]: 341/354 looper letters, 154 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2023-11-12 02:33:12,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 193 transitions, 841 flow [2023-11-12 02:33:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:33:12,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:33:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 936 transitions. [2023-11-12 02:33:12,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406779661016949 [2023-11-12 02:33:12,121 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 936 transitions. [2023-11-12 02:33:12,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 936 transitions. [2023-11-12 02:33:12,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:33:12,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 936 transitions. [2023-11-12 02:33:12,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 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 02:33:12,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 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 02:33:12,142 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 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 02:33:12,142 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 212 flow. Second operand 6 states and 936 transitions. [2023-11-12 02:33:12,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 193 transitions, 841 flow [2023-11-12 02:33:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 193 transitions, 835 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:33:12,154 INFO L231 Difference]: Finished difference. Result has 87 places, 94 transitions, 312 flow [2023-11-12 02:33:12,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=87, PETRI_TRANSITIONS=94} [2023-11-12 02:33:12,156 INFO L281 CegarLoopForPetriNet]: 84 programPoint places, 3 predicate places. [2023-11-12 02:33:12,157 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 94 transitions, 312 flow [2023-11-12 02:33:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.8) internal successors, (644), 5 states have internal predecessors, (644), 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 02:33:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:12,158 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:33:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:33:12,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:33:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1386499448, now seen corresponding path program 1 times [2023-11-12 02:33:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:12,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673041211] [2023-11-12 02:33:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:33:12,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:33:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:33:12,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:33:12,214 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:33:12,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-12 02:33:12,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (7 of 9 remaining) [2023-11-12 02:33:12,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 9 remaining) [2023-11-12 02:33:12,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 9 remaining) [2023-11-12 02:33:12,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (4 of 9 remaining) [2023-11-12 02:33:12,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 9 remaining) [2023-11-12 02:33:12,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (2 of 9 remaining) [2023-11-12 02:33:12,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 9 remaining) [2023-11-12 02:33:12,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 9 remaining) [2023-11-12 02:33:12,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:33:12,217 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:33:12,218 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:33:12,218 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:33:12,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:33:12,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,320 INFO L124 PetriNetUnfolderBase]: 25/301 cut-off events. [2023-11-12 02:33:12,320 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:33:12,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 301 events. 25/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1206 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2023-11-12 02:33:12,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,329 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:33:12,329 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,329 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 251 transitions, 530 flow [2023-11-12 02:33:12,382 INFO L124 PetriNetUnfolderBase]: 25/301 cut-off events. [2023-11-12 02:33:12,382 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:33:12,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 301 events. 25/301 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1206 event pairs, 0 based on Foata normal form. 0/263 useless extension candidates. Maximal degree in co-relation 240. Up to 10 conditions per place. [2023-11-12 02:33:12,408 INFO L119 LiptonReduction]: Number of co-enabled transitions 43120 [2023-11-12 02:33:17,624 INFO L134 LiptonReduction]: Checked pairs total: 148863 [2023-11-12 02:33:17,624 INFO L136 LiptonReduction]: Total number of compositions: 198 [2023-11-12 02:33:17,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:17,627 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;@37c045b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:17,627 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-12 02:33:17,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:33:17,633 INFO L124 PetriNetUnfolderBase]: 4/48 cut-off events. [2023-11-12 02:33:17,633 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-12 02:33:17,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:33:17,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:17,633 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 8 more)] === [2023-11-12 02:33:17,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash -845205379, now seen corresponding path program 1 times [2023-11-12 02:33:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595347712] [2023-11-12 02:33:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:17,715 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 02:33:17,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:17,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595347712] [2023-11-12 02:33:17,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595347712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:17,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:17,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603942093] [2023-11-12 02:33:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:17,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:17,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:17,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 449 [2023-11-12 02:33:17,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 120 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:33:17,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:33:17,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 449 [2023-11-12 02:33:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand