./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:02:43,845 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:02:43,952 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:02:43,960 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:02:43,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:02:44,009 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:02:44,011 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:02:44,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:02:44,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:02:44,018 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:02:44,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:02:44,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:02:44,020 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:02:44,022 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:02:44,022 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:02:44,023 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:02:44,023 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:02:44,024 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:02:44,024 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:02:44,025 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:02:44,025 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:02:44,026 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:02:44,026 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:02:44,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:02:44,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:02:44,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:02:44,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:02:44,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:02:44,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:44,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:02:44,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:02:44,033 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:02:44,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:02:44,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:02:44,033 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:02:44,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:02:44,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:02:44,034 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:02:44,034 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:02:44,035 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_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf02669c3dd381b0745ab8dce392518dfe698af15c4a94bd383f1dab20a8c06 [2023-11-06 22:02:44,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:02:44,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:02:44,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:02:44,390 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:02:44,390 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:02:44,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2023-11-06 22:02:47,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:02:47,799 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:02:47,799 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/sv-benchmarks/c/pthread-ext/09_fmaxsym.i [2023-11-06 22:02:47,815 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/data/eb68439e2/1283ad839f9c4395bbd18e44bd1b445c/FLAG624d23bd2 [2023-11-06 22:02:47,830 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/data/eb68439e2/1283ad839f9c4395bbd18e44bd1b445c [2023-11-06 22:02:47,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:02:47,834 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:02:47,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:47,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:02:47,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:02:47,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:47" (1/1) ... [2023-11-06 22:02:47,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d84830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:47, skipping insertion in model container [2023-11-06 22:02:47,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:02:47" (1/1) ... [2023-11-06 22:02:47,902 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:02:48,321 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_43239894-e8f9-4e25-9925-6e9f0030a0d7/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2023-11-06 22:02:48,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:48,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:02:48,411 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_43239894-e8f9-4e25-9925-6e9f0030a0d7/sv-benchmarks/c/pthread-ext/09_fmaxsym.i[30422,30435] [2023-11-06 22:02:48,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:02:48,471 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:02:48,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48 WrapperNode [2023-11-06 22:02:48,472 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:02:48,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:48,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:02:48,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:02:48,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,517 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,546 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 77 [2023-11-06 22:02:48,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:02:48,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:02:48,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:02:48,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:02:48,558 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,572 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,593 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:02:48,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:02:48,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:02:48,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:02:48,603 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (1/1) ... [2023-11-06 22:02:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:02:48,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:48,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:02:48,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43239894-e8f9-4e25-9925-6e9f0030a0d7/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:02:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:02:48,682 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-06 22:02:48,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-06 22:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:02:48,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:02:48,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:02:48,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:02:48,685 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 22:02:48,840 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:02:48,842 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:02:48,998 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:02:49,039 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:02:49,039 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-06 22:02:49,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:49 BoogieIcfgContainer [2023-11-06 22:02:49,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:02:49,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:02:49,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:02:49,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:02:49,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:02:47" (1/3) ... [2023-11-06 22:02:49,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a26612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:49, skipping insertion in model container [2023-11-06 22:02:49,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:02:48" (2/3) ... [2023-11-06 22:02:49,051 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a26612d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:02:49, skipping insertion in model container [2023-11-06 22:02:49,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:02:49" (3/3) ... [2023-11-06 22:02:49,052 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym.i [2023-11-06 22:02:49,061 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-06 22:02:49,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:02:49,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:02:49,073 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 22:02:49,130 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:02:49,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,261 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-11-06 22:02:49,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:49,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 87 events. 7/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-06 22:02:49,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,277 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:49,311 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 76 transitions, 156 flow [2023-11-06 22:02:49,354 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-11-06 22:02:49,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:49,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 87 events. 7/87 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-06 22:02:49,359 INFO L119 LiptonReduction]: Number of co-enabled transitions 1176 [2023-11-06 22:02:52,384 INFO L134 LiptonReduction]: Checked pairs total: 1192 [2023-11-06 22:02:52,385 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-11-06 22:02:52,401 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:02:52,408 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=LoopsAndPotentialCycles, 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;@49caaebc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:02:52,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-06 22:02:52,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:02:52,414 INFO L124 PetriNetUnfolderBase]: 1/10 cut-off events. [2023-11-06 22:02:52,415 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:52,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:52,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:02:52,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:52,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash 363066555, now seen corresponding path program 1 times [2023-11-06 22:02:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69826906] [2023-11-06 22:02:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:52,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:52,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:52,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69826906] [2023-11-06 22:02:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69826906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:52,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 22:02:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889836774] [2023-11-06 22:02:52,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:52,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:02:52,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:52,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:02:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:02:52,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 159 [2023-11-06 22:02:52,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 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) [2023-11-06 22:02:52,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:52,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 159 [2023-11-06 22:02:52,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:52,763 INFO L124 PetriNetUnfolderBase]: 7/19 cut-off events. [2023-11-06 22:02:52,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-06 22:02:52,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 19 events. 7/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 23 event pairs, 4 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 30. Up to 19 conditions per place. [2023-11-06 22:02:52,765 INFO L140 encePairwiseOnDemand]: 157/159 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-11-06 22:02:52,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 11 places, 8 transitions, 34 flow [2023-11-06 22:02:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:02:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-06 22:02:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 143 transitions. [2023-11-06 22:02:52,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2023-11-06 22:02:52,785 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 143 transitions. [2023-11-06 22:02:52,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 143 transitions. [2023-11-06 22:02:52,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:52,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 143 transitions. [2023-11-06 22:02:52,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 71.5) internal successors, (143), 2 states have internal predecessors, (143), 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) [2023-11-06 22:02:52,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-11-06 22:02:52,803 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 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) [2023-11-06 22:02:52,805 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 2 states and 143 transitions. [2023-11-06 22:02:52,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 11 places, 8 transitions, 34 flow [2023-11-06 22:02:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 11 places, 8 transitions, 34 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:02:52,811 INFO L231 Difference]: Finished difference. Result has 11 places, 8 transitions, 20 flow [2023-11-06 22:02:52,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=20, PETRI_PLACES=11, PETRI_TRANSITIONS=8} [2023-11-06 22:02:52,819 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, -1 predicate places. [2023-11-06 22:02:52,820 INFO L495 AbstractCegarLoop]: Abstraction has has 11 places, 8 transitions, 20 flow [2023-11-06 22:02:52,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 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) [2023-11-06 22:02:52,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:52,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-06 22:02:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:02:52,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:52,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1629899452, now seen corresponding path program 1 times [2023-11-06 22:02:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323616212] [2023-11-06 22:02:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:52,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:02:52,868 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:02:52,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:02:52,904 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:02:52,904 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:02:52,906 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-06 22:02:52,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-06 22:02:52,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-06 22:02:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:02:52,909 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:02:52,912 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:02:52,912 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-06 22:02:52,942 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:02:52,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:52,976 INFO L124 PetriNetUnfolderBase]: 13/143 cut-off events. [2023-11-06 22:02:52,976 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:02:52,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 143 events. 13/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-11-06 22:02:52,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:52,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:52,981 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:52,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:52,981 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:52,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 119 transitions, 248 flow [2023-11-06 22:02:53,031 INFO L124 PetriNetUnfolderBase]: 13/143 cut-off events. [2023-11-06 22:02:53,031 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 22:02:53,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 143 events. 13/143 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 250 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-11-06 22:02:53,039 INFO L119 LiptonReduction]: Number of co-enabled transitions 5964 [2023-11-06 22:02:55,380 INFO L134 LiptonReduction]: Checked pairs total: 9652 [2023-11-06 22:02:55,380 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-11-06 22:02:55,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:02:55,384 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=LoopsAndPotentialCycles, 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;@49caaebc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:02:55,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-06 22:02:55,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:02:55,390 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-06 22:02:55,390 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:02:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:55,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:02:55,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:55,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1738328201, now seen corresponding path program 1 times [2023-11-06 22:02:55,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:55,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140119863] [2023-11-06 22:02:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:55,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:55,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:55,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140119863] [2023-11-06 22:02:55,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140119863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:55,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:02:55,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864505481] [2023-11-06 22:02:55,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:55,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:55,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:55,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:55,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 231 [2023-11-06 22:02:55,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-11-06 22:02:55,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:55,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 231 [2023-11-06 22:02:55,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:02:55,676 INFO L124 PetriNetUnfolderBase]: 330/565 cut-off events. [2023-11-06 22:02:55,677 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-06 22:02:55,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1114 conditions, 565 events. 330/565 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2471 event pairs, 144 based on Foata normal form. 0/430 useless extension candidates. Maximal degree in co-relation 668. Up to 367 conditions per place. [2023-11-06 22:02:55,691 INFO L140 encePairwiseOnDemand]: 223/231 looper letters, 30 selfloop transitions, 6 changer transitions 0/41 dead transitions. [2023-11-06 22:02:55,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 169 flow [2023-11-06 22:02:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:02:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:02:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-11-06 22:02:55,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-11-06 22:02:55,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-11-06 22:02:55,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-11-06 22:02:55,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:02:55,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-11-06 22:02:55,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 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) [2023-11-06 22:02:55,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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) [2023-11-06 22:02:55,707 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 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) [2023-11-06 22:02:55,707 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 66 flow. Second operand 3 states and 315 transitions. [2023-11-06 22:02:55,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 169 flow [2023-11-06 22:02:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 169 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-06 22:02:55,715 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 106 flow [2023-11-06 22:02:55,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=231, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-11-06 22:02:55,716 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-11-06 22:02:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 106 flow [2023-11-06 22:02:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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) [2023-11-06 22:02:55,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:55,717 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-06 22:02:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:02:55,718 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-06 22:02:55,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1216794991, now seen corresponding path program 1 times [2023-11-06 22:02:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:55,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521074796] [2023-11-06 22:02:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:02:55,758 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:02:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:02:55,793 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:02:55,793 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:02:55,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-06 22:02:55,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-06 22:02:55,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-06 22:02:55,794 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-06 22:02:55,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:02:55,795 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-06 22:02:55,796 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:02:55,796 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-06 22:02:55,827 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:02:55,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,877 INFO L124 PetriNetUnfolderBase]: 19/199 cut-off events. [2023-11-06 22:02:55,877 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:02:55,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 479 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-11-06 22:02:55,880 INFO L82 GeneralOperation]: Start removeDead. Operand has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,883 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:02:55,883 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 162 transitions, 342 flow [2023-11-06 22:02:55,912 INFO L124 PetriNetUnfolderBase]: 19/199 cut-off events. [2023-11-06 22:02:55,912 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-06 22:02:55,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 199 events. 19/199 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 479 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 147. Up to 8 conditions per place. [2023-11-06 22:02:55,926 INFO L119 LiptonReduction]: Number of co-enabled transitions 14364 [2023-11-06 22:02:59,023 INFO L134 LiptonReduction]: Checked pairs total: 23167 [2023-11-06 22:02:59,023 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-11-06 22:02:59,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:02:59,026 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=LoopsAndPotentialCycles, 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;@49caaebc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:02:59,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-06 22:02:59,030 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:02:59,031 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-06 22:02:59,031 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:02:59,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:02:59,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:59,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:02:59,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash 999976119, now seen corresponding path program 1 times [2023-11-06 22:02:59,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:59,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900464970] [2023-11-06 22:02:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:59,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:02:59,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:59,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900464970] [2023-11-06 22:02:59,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900464970] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:02:59,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:02:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:02:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011614576] [2023-11-06 22:02:59,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:02:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:02:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:02:59,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:02:59,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 317 [2023-11-06 22:02:59,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2023-11-06 22:02:59,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:02:59,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 317 [2023-11-06 22:02:59,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:00,048 INFO L124 PetriNetUnfolderBase]: 4844/6972 cut-off events. [2023-11-06 22:03:00,049 INFO L125 PetriNetUnfolderBase]: For 685/685 co-relation queries the response was YES. [2023-11-06 22:03:00,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13907 conditions, 6972 events. 4844/6972 cut-off events. For 685/685 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 39476 event pairs, 2158 based on Foata normal form. 0/5364 useless extension candidates. Maximal degree in co-relation 1580. Up to 4419 conditions per place. [2023-11-06 22:03:00,116 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 48 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2023-11-06 22:03:00,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 62 transitions, 264 flow [2023-11-06 22:03:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-11-06 22:03:00,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4616193480546793 [2023-11-06 22:03:00,125 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-11-06 22:03:00,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-11-06 22:03:00,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:00,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-11-06 22:03:00,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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) [2023-11-06 22:03:00,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:03:00,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:03:00,143 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 3 states and 439 transitions. [2023-11-06 22:03:00,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 62 transitions, 264 flow [2023-11-06 22:03:00,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 62 transitions, 260 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-06 22:03:00,149 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 142 flow [2023-11-06 22:03:00,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2023-11-06 22:03:00,152 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-11-06 22:03:00,152 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 142 flow [2023-11-06 22:03:00,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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) [2023-11-06 22:03:00,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:00,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:00,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:03:00,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-06 22:03:00,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1075390170, now seen corresponding path program 1 times [2023-11-06 22:03:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:00,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580486546] [2023-11-06 22:03:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:00,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:00,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:03:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:00,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580486546] [2023-11-06 22:03:00,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580486546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:00,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:00,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:00,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174830708] [2023-11-06 22:03:00,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:00,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:00,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:00,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 317 [2023-11-06 22:03:00,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2023-11-06 22:03:00,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:00,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 317 [2023-11-06 22:03:00,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:01,561 INFO L124 PetriNetUnfolderBase]: 7374/10405 cut-off events. [2023-11-06 22:03:01,562 INFO L125 PetriNetUnfolderBase]: For 4524/4524 co-relation queries the response was YES. [2023-11-06 22:03:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24101 conditions, 10405 events. 7374/10405 cut-off events. For 4524/4524 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 58645 event pairs, 3194 based on Foata normal form. 0/8771 useless extension candidates. Maximal degree in co-relation 9366. Up to 6545 conditions per place. [2023-11-06 22:03:01,717 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 54 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2023-11-06 22:03:01,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 70 transitions, 357 flow [2023-11-06 22:03:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-11-06 22:03:01,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45846477392218715 [2023-11-06 22:03:01,721 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-11-06 22:03:01,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-11-06 22:03:01,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:01,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-11-06 22:03:01,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 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) [2023-11-06 22:03:01,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:03:01,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 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) [2023-11-06 22:03:01,728 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 142 flow. Second operand 3 states and 436 transitions. [2023-11-06 22:03:01,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 70 transitions, 357 flow [2023-11-06 22:03:01,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 70 transitions, 333 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:01,741 INFO L231 Difference]: Finished difference. Result has 45 places, 49 transitions, 196 flow [2023-11-06 22:03:01,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=45, PETRI_TRANSITIONS=49} [2023-11-06 22:03:01,742 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-11-06 22:03:01,742 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 49 transitions, 196 flow [2023-11-06 22:03:01,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 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) [2023-11-06 22:03:01,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:01,743 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-06 22:03:01,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:03:01,743 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)] === [2023-11-06 22:03:01,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:01,744 INFO L85 PathProgramCache]: Analyzing trace with hash 958413648, now seen corresponding path program 1 times [2023-11-06 22:03:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001232750] [2023-11-06 22:03:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:01,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:03:01,764 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 22:03:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 22:03:01,783 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-06 22:03:01,783 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 22:03:01,784 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-06 22:03:01,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-06 22:03:01,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-06 22:03:01,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-06 22:03:01,785 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-06 22:03:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:03:01,785 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-06 22:03:01,786 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-06 22:03:01,786 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-06 22:03:01,828 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-06 22:03:01,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,881 INFO L124 PetriNetUnfolderBase]: 25/255 cut-off events. [2023-11-06 22:03:01,881 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:03:01,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 732 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-11-06 22:03:01,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,888 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-06 22:03:01,889 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 205 transitions, 438 flow [2023-11-06 22:03:01,937 INFO L124 PetriNetUnfolderBase]: 25/255 cut-off events. [2023-11-06 22:03:01,938 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-06 22:03:01,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 255 events. 25/255 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 732 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 207. Up to 10 conditions per place. [2023-11-06 22:03:01,963 INFO L119 LiptonReduction]: Number of co-enabled transitions 26376 [2023-11-06 22:03:05,583 INFO L134 LiptonReduction]: Checked pairs total: 43006 [2023-11-06 22:03:05,583 INFO L136 LiptonReduction]: Total number of compositions: 193 [2023-11-06 22:03:05,594 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:03:05,599 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=LoopsAndPotentialCycles, 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;@49caaebc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:03:05,600 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-06 22:03:05,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-06 22:03:05,604 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-06 22:03:05,604 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-06 22:03:05,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:05,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:05,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:03:05,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1313939467, now seen corresponding path program 1 times [2023-11-06 22:03:05,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:05,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172393044] [2023-11-06 22:03:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:03:05,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172393044] [2023-11-06 22:03:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172393044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:05,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:05,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699791470] [2023-11-06 22:03:05,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:05,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:05,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 398 [2023-11-06 22:03:05,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-11-06 22:03:05,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:05,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 398 [2023-11-06 22:03:05,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:12,338 INFO L124 PetriNetUnfolderBase]: 54016/71260 cut-off events. [2023-11-06 22:03:12,339 INFO L125 PetriNetUnfolderBase]: For 10233/10233 co-relation queries the response was YES. [2023-11-06 22:03:12,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143101 conditions, 71260 events. 54016/71260 cut-off events. For 10233/10233 co-relation queries the response was YES. Maximal size of possible extension queue 2671. Compared 439169 event pairs, 25360 based on Foata normal form. 0/54711 useless extension candidates. Maximal degree in co-relation 13864. Up to 46549 conditions per place. [2023-11-06 22:03:12,888 INFO L140 encePairwiseOnDemand]: 388/398 looper letters, 65 selfloop transitions, 8 changer transitions 0/82 dead transitions. [2023-11-06 22:03:12,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 82 transitions, 359 flow [2023-11-06 22:03:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:12,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-11-06 22:03:12,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47068676716917923 [2023-11-06 22:03:12,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-11-06 22:03:12,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-11-06 22:03:12,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:12,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-11-06 22:03:12,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2023-11-06 22:03:12,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:12,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:12,900 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 128 flow. Second operand 3 states and 562 transitions. [2023-11-06 22:03:12,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 82 transitions, 359 flow [2023-11-06 22:03:12,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 347 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-06 22:03:12,915 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 178 flow [2023-11-06 22:03:12,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2023-11-06 22:03:12,917 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-11-06 22:03:12,918 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 178 flow [2023-11-06 22:03:12,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 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) [2023-11-06 22:03:12,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:12,919 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:12,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:03:12,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:03:12,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:12,923 INFO L85 PathProgramCache]: Analyzing trace with hash -329392350, now seen corresponding path program 1 times [2023-11-06 22:03:12,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:12,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262738120] [2023-11-06 22:03:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:12,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:03:12,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262738120] [2023-11-06 22:03:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262738120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:12,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:12,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:12,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049284535] [2023-11-06 22:03:12,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:12,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:12,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:13,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 398 [2023-11-06 22:03:13,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2023-11-06 22:03:13,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:13,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 398 [2023-11-06 22:03:13,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:22,839 INFO L124 PetriNetUnfolderBase]: 84033/109583 cut-off events. [2023-11-06 22:03:22,839 INFO L125 PetriNetUnfolderBase]: For 44890/44918 co-relation queries the response was YES. [2023-11-06 22:03:23,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249444 conditions, 109583 events. 84033/109583 cut-off events. For 44890/44918 co-relation queries the response was YES. Maximal size of possible extension queue 4068. Compared 679639 event pairs, 37745 based on Foata normal form. 28/90128 useless extension candidates. Maximal degree in co-relation 89560. Up to 70968 conditions per place. [2023-11-06 22:03:23,676 INFO L140 encePairwiseOnDemand]: 389/398 looper letters, 72 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2023-11-06 22:03:23,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 464 flow [2023-11-06 22:03:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-06 22:03:23,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46817420435510887 [2023-11-06 22:03:23,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-06 22:03:23,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-06 22:03:23,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:23,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-06 22:03:23,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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) [2023-11-06 22:03:23,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:23,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:23,688 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 178 flow. Second operand 3 states and 559 transitions. [2023-11-06 22:03:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 464 flow [2023-11-06 22:03:23,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:23,883 INFO L231 Difference]: Finished difference. Result has 56 places, 63 transitions, 250 flow [2023-11-06 22:03:23,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=56, PETRI_TRANSITIONS=63} [2023-11-06 22:03:23,884 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-11-06 22:03:23,884 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 63 transitions, 250 flow [2023-11-06 22:03:23,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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) [2023-11-06 22:03:23,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:23,885 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:23,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 22:03:23,885 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:03:23,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:23,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2091432133, now seen corresponding path program 1 times [2023-11-06 22:03:23,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:23,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826092204] [2023-11-06 22:03:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:23,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 22:03:23,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:23,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826092204] [2023-11-06 22:03:23,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826092204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:23,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:23,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:03:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451844034] [2023-11-06 22:03:23,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:03:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:03:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:03:23,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 398 [2023-11-06 22:03:23,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 63 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2023-11-06 22:03:23,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:23,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 398 [2023-11-06 22:03:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-06 22:03:37,617 INFO L124 PetriNetUnfolderBase]: 116381/150392 cut-off events. [2023-11-06 22:03:37,617 INFO L125 PetriNetUnfolderBase]: For 98328/98706 co-relation queries the response was YES. [2023-11-06 22:03:37,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371343 conditions, 150392 events. 116381/150392 cut-off events. For 98328/98706 co-relation queries the response was YES. Maximal size of possible extension queue 5461. Compared 929456 event pairs, 55467 based on Foata normal form. 0/128787 useless extension candidates. Maximal degree in co-relation 142235. Up to 105232 conditions per place. [2023-11-06 22:03:38,909 INFO L140 encePairwiseOnDemand]: 389/398 looper letters, 79 selfloop transitions, 16 changer transitions 0/104 dead transitions. [2023-11-06 22:03:38,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 603 flow [2023-11-06 22:03:38,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:03:38,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-06 22:03:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2023-11-06 22:03:38,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.466499162479062 [2023-11-06 22:03:38,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2023-11-06 22:03:38,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2023-11-06 22:03:38,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-06 22:03:38,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2023-11-06 22:03:38,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2023-11-06 22:03:38,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:38,918 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 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) [2023-11-06 22:03:38,918 INFO L175 Difference]: Start difference. First operand has 56 places, 63 transitions, 250 flow. Second operand 3 states and 557 transitions. [2023-11-06 22:03:38,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 603 flow [2023-11-06 22:03:39,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 104 transitions, 565 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-06 22:03:39,314 INFO L231 Difference]: Finished difference. Result has 58 places, 74 transitions, 370 flow [2023-11-06 22:03:39,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=58, PETRI_TRANSITIONS=74} [2023-11-06 22:03:39,315 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-11-06 22:03:39,315 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 74 transitions, 370 flow [2023-11-06 22:03:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2023-11-06 22:03:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-06 22:03:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:03:39,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:03:39,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-06 22:03:39,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:03:39,317 INFO L85 PathProgramCache]: Analyzing trace with hash 612379775, now seen corresponding path program 1 times [2023-11-06 22:03:39,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:03:39,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665491536] [2023-11-06 22:03:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:03:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:03:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:03:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:03:39,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:03:39,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665491536] [2023-11-06 22:03:39,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665491536] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:03:39,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:03:39,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:03:39,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390215816] [2023-11-06 22:03:39,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:03:39,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:03:39,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:03:39,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:03:39,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:03:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 398 [2023-11-06 22:03:39,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 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) [2023-11-06 22:03:39,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-06 22:03:39,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 398 [2023-11-06 22:03:39,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand