./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:27:41,914 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:27:42,037 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:27:42,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:27:42,046 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:27:42,088 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:27:42,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:27:42,089 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:27:42,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:27:42,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:27:42,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:27:42,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:27:42,098 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:27:42,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:27:42,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:27:42,101 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:27:42,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:27:42,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:27:42,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:27:42,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:27:42,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:27:42,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:27:42,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:27:42,106 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:27:42,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:27:42,108 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:27:42,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:27:42,109 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:27:42,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:42,110 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:27:42,111 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:27:42,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:27:42,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:27:42,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:27:42,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:27:42,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:27:42,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:27:42,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:27:42,114 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:27:42,114 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_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2023-11-12 02:27:42,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:27:42,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:27:42,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:27:42,512 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:27:42,513 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:27:42,514 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-12 02:27:45,679 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:27:45,967 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:27:45,982 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2023-11-12 02:27:46,005 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/data/aee669ca6/84e97812f47047018513ad03fcc7564d/FLAG7e3c39905 [2023-11-12 02:27:46,024 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/data/aee669ca6/84e97812f47047018513ad03fcc7564d [2023-11-12 02:27:46,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:27:46,032 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:27:46,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:46,035 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:27:46,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:27:46,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b558e10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46, skipping insertion in model container [2023-11-12 02:27:46,042 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,103 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:27:46,444 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_4af57c3a-b043-41a6-bec4-9137a5908bd3/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-11-12 02:27:46,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:46,487 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:27:46,550 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_4af57c3a-b043-41a6-bec4-9137a5908bd3/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2023-11-12 02:27:46,561 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:27:46,607 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:27:46,608 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46 WrapperNode [2023-11-12 02:27:46,608 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:27:46,609 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:46,610 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:27:46,610 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:27:46,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,633 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,658 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-12 02:27:46,659 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:27:46,660 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:27:46,660 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:27:46,660 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:27:46,671 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,680 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,713 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,722 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:27:46,727 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:27:46,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:27:46,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:27:46,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (1/1) ... [2023-11-12 02:27:46,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:27:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:46,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:27:46,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4af57c3a-b043-41a6-bec4-9137a5908bd3/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:27:46,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:27:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:27:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:27:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:27:46,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:27:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-12 02:27:46,809 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-12 02:27:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:27:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:27:46,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:27:46,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:27:46,811 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:27:46,989 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:27:46,992 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:27:47,268 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:27:47,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:27:47,277 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-12 02:27:47,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:47 BoogieIcfgContainer [2023-11-12 02:27:47,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:27:47,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:27:47,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:27:47,286 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:27:47,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:27:46" (1/3) ... [2023-11-12 02:27:47,287 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90144b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:47, skipping insertion in model container [2023-11-12 02:27:47,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:27:46" (2/3) ... [2023-11-12 02:27:47,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@90144b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:27:47, skipping insertion in model container [2023-11-12 02:27:47,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:27:47" (3/3) ... [2023-11-12 02:27:47,289 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2023-11-12 02:27:47,299 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:27:47,312 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:27:47,312 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:27:47,312 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:27:47,402 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-12 02:27:47,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 128 transitions, 263 flow [2023-11-12 02:27:47,589 INFO L124 PetriNetUnfolderBase]: 30/188 cut-off events. [2023-11-12 02:27:47,589 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:27:47,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 188 events. 30/188 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 566 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-12 02:27:47,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 128 transitions, 263 flow [2023-11-12 02:27:47,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 123 transitions, 250 flow [2023-11-12 02:27:47,614 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:47,637 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 123 transitions, 250 flow [2023-11-12 02:27:47,647 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 123 transitions, 250 flow [2023-11-12 02:27:47,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 123 transitions, 250 flow [2023-11-12 02:27:47,750 INFO L124 PetriNetUnfolderBase]: 29/183 cut-off events. [2023-11-12 02:27:47,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:47,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 183 events. 29/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 550 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 96. Up to 6 conditions per place. [2023-11-12 02:27:47,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 4092 [2023-11-12 02:27:50,603 INFO L134 LiptonReduction]: Checked pairs total: 11169 [2023-11-12 02:27:50,605 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-11-12 02:27:50,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:50,632 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e59c20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:50,633 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:50,637 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:50,638 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-11-12 02:27:50,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:50,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:50,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:27:50,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:50,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:50,646 INFO L85 PathProgramCache]: Analyzing trace with hash 463581885, now seen corresponding path program 1 times [2023-11-12 02:27:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:50,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898113563] [2023-11-12 02:27:50,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:50,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:50,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898113563] [2023-11-12 02:27:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898113563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:50,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:50,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:50,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386592249] [2023-11-12 02:27:50,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:50,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:50,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:51,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 220 [2023-11-12 02:27:51,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 52 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:51,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:51,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 220 [2023-11-12 02:27:51,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:51,163 INFO L124 PetriNetUnfolderBase]: 161/376 cut-off events. [2023-11-12 02:27:51,163 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:51,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 376 events. 161/376 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1584 event pairs, 75 based on Foata normal form. 69/404 useless extension candidates. Maximal degree in co-relation 697. Up to 321 conditions per place. [2023-11-12 02:27:51,177 INFO L140 encePairwiseOnDemand]: 202/220 looper letters, 33 selfloop transitions, 2 changer transitions 4/48 dead transitions. [2023-11-12 02:27:51,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 48 transitions, 178 flow [2023-11-12 02:27:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-11-12 02:27:51,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556060606060606 [2023-11-12 02:27:51,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-11-12 02:27:51,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-11-12 02:27:51,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:51,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-11-12 02:27:51,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:51,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:51,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:51,226 INFO L175 Difference]: Start difference. First operand has 40 places, 52 transitions, 108 flow. Second operand 3 states and 367 transitions. [2023-11-12 02:27:51,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 48 transitions, 178 flow [2023-11-12 02:27:51,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:51,234 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 78 flow [2023-11-12 02:27:51,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-11-12 02:27:51,243 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-11-12 02:27:51,243 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 78 flow [2023-11-12 02:27:51,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:51,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:51,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:27:51,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:27:51,245 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:51,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1500992761, now seen corresponding path program 1 times [2023-11-12 02:27:51,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:51,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865320620] [2023-11-12 02:27:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:51,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:51,308 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:51,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:51,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:51,382 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:27:51,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:27:51,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:27:51,385 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:27:51,388 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:51,388 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:27:51,425 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:27:51,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,485 INFO L124 PetriNetUnfolderBase]: 51/307 cut-off events. [2023-11-12 02:27:51,485 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:27:51,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 307 events. 51/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1064 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2023-11-12 02:27:51,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,492 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,492 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:51,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 161 transitions, 338 flow [2023-11-12 02:27:51,535 INFO L124 PetriNetUnfolderBase]: 51/307 cut-off events. [2023-11-12 02:27:51,535 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-12 02:27:51,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 307 events. 51/307 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1064 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 190. Up to 9 conditions per place. [2023-11-12 02:27:51,550 INFO L119 LiptonReduction]: Number of co-enabled transitions 10788 [2023-11-12 02:27:54,194 INFO L134 LiptonReduction]: Checked pairs total: 32033 [2023-11-12 02:27:54,194 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-11-12 02:27:54,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:54,198 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e59c20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:54,198 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:54,202 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:54,202 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-12 02:27:54,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:54,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:54,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:27:54,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:54,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:54,204 INFO L85 PathProgramCache]: Analyzing trace with hash 752556251, now seen corresponding path program 1 times [2023-11-12 02:27:54,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:54,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545390771] [2023-11-12 02:27:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:54,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545390771] [2023-11-12 02:27:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545390771] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:54,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:54,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774698345] [2023-11-12 02:27:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:54,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:54,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:54,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:54,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 270 [2023-11-12 02:27:54,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 79 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:54,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 270 [2023-11-12 02:27:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:27:54,937 INFO L124 PetriNetUnfolderBase]: 3002/5059 cut-off events. [2023-11-12 02:27:54,938 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-11-12 02:27:54,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9749 conditions, 5059 events. 3002/5059 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 32549 event pairs, 1260 based on Foata normal form. 1207/5807 useless extension candidates. Maximal degree in co-relation 1480. Up to 4630 conditions per place. [2023-11-12 02:27:54,972 INFO L140 encePairwiseOnDemand]: 247/270 looper letters, 41 selfloop transitions, 2 changer transitions 9/69 dead transitions. [2023-11-12 02:27:54,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 256 flow [2023-11-12 02:27:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:54,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:27:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-11-12 02:27:54,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-11-12 02:27:54,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-11-12 02:27:54,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-11-12 02:27:54,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:27:54,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-11-12 02:27:54,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,984 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,985 INFO L175 Difference]: Start difference. First operand has 60 places, 79 transitions, 174 flow. Second operand 3 states and 459 transitions. [2023-11-12 02:27:54,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 256 flow [2023-11-12 02:27:54,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 256 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:27:54,989 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 122 flow [2023-11-12 02:27:54,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2023-11-12 02:27:54,991 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2023-11-12 02:27:54,991 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 122 flow [2023-11-12 02:27:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:54,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:54,992 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:27:54,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:27:54,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:54,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1455074357, now seen corresponding path program 1 times [2023-11-12 02:27:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782740649] [2023-11-12 02:27:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:55,052 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:27:55,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:27:55,090 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:27:55,093 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:27:55,094 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:27:55,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:27:55,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:27:55,094 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:27:55,095 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:27:55,095 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:27:55,130 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-12 02:27:55,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,252 INFO L124 PetriNetUnfolderBase]: 77/461 cut-off events. [2023-11-12 02:27:55,252 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:27:55,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 77/461 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1741 event pairs, 1 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-11-12 02:27:55,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,263 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,263 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:27:55,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,264 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 194 transitions, 415 flow [2023-11-12 02:27:55,328 INFO L124 PetriNetUnfolderBase]: 77/461 cut-off events. [2023-11-12 02:27:55,328 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-12 02:27:55,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 77/461 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1741 event pairs, 1 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 315. Up to 16 conditions per place. [2023-11-12 02:27:55,356 INFO L119 LiptonReduction]: Number of co-enabled transitions 19344 [2023-11-12 02:27:58,232 INFO L134 LiptonReduction]: Checked pairs total: 63773 [2023-11-12 02:27:58,232 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-11-12 02:27:58,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:27:58,236 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e59c20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:27:58,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:27:58,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:27:58,239 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-12 02:27:58,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:27:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:27:58,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:27:58,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:27:58,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1086433923, now seen corresponding path program 1 times [2023-11-12 02:27:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096847825] [2023-11-12 02:27:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:58,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:27:58,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:58,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096847825] [2023-11-12 02:27:58,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096847825] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:58,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:58,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:27:58,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645702227] [2023-11-12 02:27:58,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:58,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:58,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 317 [2023-11-12 02:27:58,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:27:58,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:27:58,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 317 [2023-11-12 02:27:58,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:28:04,716 INFO L124 PetriNetUnfolderBase]: 34432/50948 cut-off events. [2023-11-12 02:28:04,716 INFO L125 PetriNetUnfolderBase]: For 813/813 co-relation queries the response was YES. [2023-11-12 02:28:04,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98314 conditions, 50948 events. 34432/50948 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 1438. Compared 379833 event pairs, 19617 based on Foata normal form. 9598/57557 useless extension candidates. Maximal degree in co-relation 9001. Up to 46808 conditions per place. [2023-11-12 02:28:05,178 INFO L140 encePairwiseOnDemand]: 288/317 looper letters, 49 selfloop transitions, 2 changer transitions 10/86 dead transitions. [2023-11-12 02:28:05,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 86 transitions, 319 flow [2023-11-12 02:28:05,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:28:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:28:05,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2023-11-12 02:28:05,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772870662460567 [2023-11-12 02:28:05,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2023-11-12 02:28:05,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2023-11-12 02:28:05,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:28:05,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2023-11-12 02:28:05,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,191 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) [2023-11-12 02:28:05,193 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) [2023-11-12 02:28:05,193 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 231 flow. Second operand 3 states and 549 transitions. [2023-11-12 02:28:05,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 86 transitions, 319 flow [2023-11-12 02:28:05,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 319 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:28:05,209 INFO L231 Difference]: Finished difference. Result has 80 places, 67 transitions, 162 flow [2023-11-12 02:28:05,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=80, PETRI_TRANSITIONS=67} [2023-11-12 02:28:05,212 INFO L281 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2023-11-12 02:28:05,214 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 67 transitions, 162 flow [2023-11-12 02:28:05,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:05,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:05,215 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:28:05,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:28:05,216 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:28:05,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:05,216 INFO L85 PathProgramCache]: Analyzing trace with hash -904046276, now seen corresponding path program 1 times [2023-11-12 02:28:05,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:05,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002435705] [2023-11-12 02:28:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:05,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:05,253 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:28:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:28:05,285 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:28:05,285 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:28:05,286 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-12 02:28:05,286 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-12 02:28:05,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:28:05,286 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:28:05,287 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:28:05,287 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:28:05,325 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-12 02:28:05,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,425 INFO L124 PetriNetUnfolderBase]: 115/687 cut-off events. [2023-11-12 02:28:05,425 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:28:05,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 687 events. 115/687 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2885 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-11-12 02:28:05,431 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,437 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:28:05,437 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,438 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 227 transitions, 494 flow [2023-11-12 02:28:05,531 INFO L124 PetriNetUnfolderBase]: 115/687 cut-off events. [2023-11-12 02:28:05,531 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-12 02:28:05,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738 conditions, 687 events. 115/687 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2885 event pairs, 6 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 481. Up to 32 conditions per place. [2023-11-12 02:28:05,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 30008 [2023-11-12 02:28:08,864 INFO L134 LiptonReduction]: Checked pairs total: 91340 [2023-11-12 02:28:08,864 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-12 02:28:08,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:28:08,867 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@46e59c20, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:28:08,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 02:28:08,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:28:08,870 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-12 02:28:08,870 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:28:08,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:28:08,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:28:08,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-12 02:28:08,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:28:08,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1469054026, now seen corresponding path program 1 times [2023-11-12 02:28:08,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:28:08,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756609439] [2023-11-12 02:28:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:28:08,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:28:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:28:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:28:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:28:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756609439] [2023-11-12 02:28:08,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756609439] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:28:08,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:28:08,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:28:08,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745008860] [2023-11-12 02:28:08,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:28:08,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:28:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:28:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:28:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:28:08,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 368 [2023-11-12 02:28:08,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 125 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:28:08,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:28:08,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 368 [2023-11-12 02:28:08,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand