./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/08_rand_cas.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/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 a8c5e3af8ba67928821663a592549ea9172bf8db4560f315dbf6722b49e13ae8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:08:35,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:08:36,043 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:08:36,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:08:36,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:08:36,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:08:36,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:08:36,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:08:36,078 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:08:36,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:08:36,079 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:08:36,080 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:08:36,080 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:08:36,081 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:08:36,082 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:08:36,082 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:08:36,083 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:08:36,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:08:36,084 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:08:36,085 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:08:36,085 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:08:36,086 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:08:36,087 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:08:36,087 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:08:36,088 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:08:36,088 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:08:36,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:08:36,089 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:08:36,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:36,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:08:36,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:08:36,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:08:36,109 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:08:36,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:08:36,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:08:36,111 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:08:36,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:08:36,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:08:36,112 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:08:36,112 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8c5e3af8ba67928821663a592549ea9172bf8db4560f315dbf6722b49e13ae8 [2023-11-12 02:08:36,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:08:36,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:08:36,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:08:36,444 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:08:36,445 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:08:36,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread-ext/08_rand_cas.i [2023-11-12 02:08:39,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:08:40,126 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:08:40,127 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i [2023-11-12 02:08:40,149 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/data/bf2c96b83/8b1befe5de9e440ea5436aa386f47f63/FLAGe811ceef6 [2023-11-12 02:08:40,173 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/data/bf2c96b83/8b1befe5de9e440ea5436aa386f47f63 [2023-11-12 02:08:40,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:08:40,192 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:08:40,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:40,194 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:08:40,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:08:40,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e2c6696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40, skipping insertion in model container [2023-11-12 02:08:40,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:08:40,684 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30781,30794] [2023-11-12 02:08:40,694 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31129,31142] [2023-11-12 02:08:40,698 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31392,31405] [2023-11-12 02:08:40,706 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:40,719 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:08:40,768 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[30781,30794] [2023-11-12 02:08:40,772 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31129,31142] [2023-11-12 02:08:40,774 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_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/sv-benchmarks/c/pthread-ext/08_rand_cas.i[31392,31405] [2023-11-12 02:08:40,778 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:08:40,821 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:08:40,822 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-12 02:08:40,831 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:08:40,832 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40 WrapperNode [2023-11-12 02:08:40,833 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:08:40,834 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:40,834 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:08:40,835 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:08:40,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,933 INFO L138 Inliner]: procedures = 178, calls = 36, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 144 [2023-11-12 02:08:40,934 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:08:40,935 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:08:40,935 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:08:40,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:08:40,947 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,948 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,977 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,995 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:40,998 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:41,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:41,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:08:41,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:08:41,014 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:08:41,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:08:41,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (1/1) ... [2023-11-12 02:08:41,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:08:41,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:08:41,066 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:08:41,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa6004dc-0baf-46a8-9ff4-a9384571b5dc/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:08:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:08:41,126 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-12 02:08:41,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-12 02:08:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:08:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-12 02:08:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:08:41,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:08:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:08:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:08:41,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-12 02:08:41,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:08:41,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:08:41,131 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 02:08:41,298 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:08:41,301 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:08:41,559 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:08:41,675 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:08:41,675 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:08:41,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:41 BoogieIcfgContainer [2023-11-12 02:08:41,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:08:41,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:08:41,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:08:41,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:08:41,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:08:40" (1/3) ... [2023-11-12 02:08:41,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197b6efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:41, skipping insertion in model container [2023-11-12 02:08:41,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:08:40" (2/3) ... [2023-11-12 02:08:41,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197b6efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:08:41, skipping insertion in model container [2023-11-12 02:08:41,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:08:41" (3/3) ... [2023-11-12 02:08:41,720 INFO L112 eAbstractionObserver]: Analyzing ICFG 08_rand_cas.i [2023-11-12 02:08:41,733 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-12 02:08:41,745 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:08:41,745 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-12 02:08:41,746 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:08:41,870 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:08:41,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:41,983 INFO L124 PetriNetUnfolderBase]: 14/134 cut-off events. [2023-11-12 02:08:41,983 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:41,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 202 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 107. Up to 4 conditions per place. [2023-11-12 02:08:41,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:42,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:42,014 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:42,040 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:42,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:42,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 123 transitions, 250 flow [2023-11-12 02:08:42,090 INFO L124 PetriNetUnfolderBase]: 14/134 cut-off events. [2023-11-12 02:08:42,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 134 events. 14/134 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 202 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 107. Up to 4 conditions per place. [2023-11-12 02:08:42,096 INFO L119 LiptonReduction]: Number of co-enabled transitions 2632 [2023-11-12 02:08:45,944 INFO L134 LiptonReduction]: Checked pairs total: 2722 [2023-11-12 02:08:45,944 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-11-12 02:08:45,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:45,969 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;@1559c9a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:45,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-12 02:08:45,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:08:45,984 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-12 02:08:45,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:45,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:45,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:08:45,986 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:08:45,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 636282090, now seen corresponding path program 1 times [2023-11-12 02:08:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:46,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145492601] [2023-11-12 02:08:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:46,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:46,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:46,603 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 02:08:46,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145492601] [2023-11-12 02:08:46,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145492601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:46,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:46,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632061958] [2023-11-12 02:08:46,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:46,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:46,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:46,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:46,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 261 [2023-11-12 02:08:46,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 22 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 02:08:46,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:46,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 261 [2023-11-12 02:08:46,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:46,789 INFO L124 PetriNetUnfolderBase]: 30/68 cut-off events. [2023-11-12 02:08:46,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:08:46,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 68 events. 30/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 168 event pairs, 16 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 122. Up to 58 conditions per place. [2023-11-12 02:08:46,794 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-11-12 02:08:46,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 22 transitions, 90 flow [2023-11-12 02:08:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:08:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-11-12 02:08:46,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2023-11-12 02:08:46,823 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-11-12 02:08:46,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-11-12 02:08:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:46,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-11-12 02:08:46,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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 02:08:46,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 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 02:08:46,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 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 02:08:46,846 INFO L175 Difference]: Start difference. First operand has 19 places, 22 transitions, 48 flow. Second operand 3 states and 327 transitions. [2023-11-12 02:08:46,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 22 transitions, 90 flow [2023-11-12 02:08:46,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:08:46,851 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 54 flow [2023-11-12 02:08:46,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-11-12 02:08:46,858 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 2 predicate places. [2023-11-12 02:08:46,859 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 54 flow [2023-11-12 02:08:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 02:08:46,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:46,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-12 02:08:46,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:08:46,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-12 02:08:46,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:46,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1750166416, now seen corresponding path program 1 times [2023-11-12 02:08:46,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626333712] [2023-11-12 02:08:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:46,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:46,907 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:08:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:46,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:08:46,958 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:08:46,960 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-12 02:08:46,962 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-12 02:08:46,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-12 02:08:46,965 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-12 02:08:46,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-12 02:08:46,966 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-12 02:08:46,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-12 02:08:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:08:46,968 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-12 02:08:46,973 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:08:46,973 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-12 02:08:47,055 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:08:47,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,165 INFO L124 PetriNetUnfolderBase]: 27/242 cut-off events. [2023-11-12 02:08:47,165 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:08:47,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 242 events. 27/242 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 691 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 201. Up to 6 conditions per place. [2023-11-12 02:08:47,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,178 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,178 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:47,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,179 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 218 transitions, 446 flow [2023-11-12 02:08:47,237 INFO L124 PetriNetUnfolderBase]: 27/242 cut-off events. [2023-11-12 02:08:47,238 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:08:47,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 242 events. 27/242 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 691 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 201. Up to 6 conditions per place. [2023-11-12 02:08:47,264 INFO L119 LiptonReduction]: Number of co-enabled transitions 23124 [2023-11-12 02:08:52,511 INFO L134 LiptonReduction]: Checked pairs total: 29127 [2023-11-12 02:08:52,511 INFO L136 LiptonReduction]: Total number of compositions: 226 [2023-11-12 02:08:52,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:08:52,515 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;@1559c9a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:08:52,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-12 02:08:52,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:08:52,521 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-12 02:08:52,521 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:08:52,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:52,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:08:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash -471867202, now seen corresponding path program 1 times [2023-11-12 02:08:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908043845] [2023-11-12 02:08:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:52,648 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 02:08:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908043845] [2023-11-12 02:08:52,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908043845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:52,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:52,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:08:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277721919] [2023-11-12 02:08:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:52,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:08:52,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:52,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:08:52,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:08:52,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 444 [2023-11-12 02:08:52,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 54 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 02:08:52,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:52,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 444 [2023-11-12 02:08:52,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:53,208 INFO L124 PetriNetUnfolderBase]: 1164/1886 cut-off events. [2023-11-12 02:08:53,208 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-11-12 02:08:53,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3757 conditions, 1886 events. 1164/1886 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10452 event pairs, 673 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 1596. Up to 1539 conditions per place. [2023-11-12 02:08:53,229 INFO L140 encePairwiseOnDemand]: 432/444 looper letters, 83 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-11-12 02:08:53,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 94 transitions, 384 flow [2023-11-12 02:08:53,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:08:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:08:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 798 transitions. [2023-11-12 02:08:53,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44932432432432434 [2023-11-12 02:08:53,235 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 798 transitions. [2023-11-12 02:08:53,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 798 transitions. [2023-11-12 02:08:53,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:53,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 798 transitions. [2023-11-12 02:08:53,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.5) internal successors, (798), 4 states have internal predecessors, (798), 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 02:08:53,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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 02:08:53,250 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 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 02:08:53,250 INFO L175 Difference]: Start difference. First operand has 47 places, 54 transitions, 118 flow. Second operand 4 states and 798 transitions. [2023-11-12 02:08:53,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 94 transitions, 384 flow [2023-11-12 02:08:53,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 94 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:08:53,255 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 138 flow [2023-11-12 02:08:53,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2023-11-12 02:08:53,257 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-11-12 02:08:53,257 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 138 flow [2023-11-12 02:08:53,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 02:08:53,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:53,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:08:53,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:08:53,259 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:08:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:53,260 INFO L85 PathProgramCache]: Analyzing trace with hash -988370776, now seen corresponding path program 1 times [2023-11-12 02:08:53,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:53,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582653741] [2023-11-12 02:08:53,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:53,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:08:53,339 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 02:08:53,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:08:53,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582653741] [2023-11-12 02:08:53,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582653741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:08:53,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:08:53,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:08:53,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802443894] [2023-11-12 02:08:53,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:08:53,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:08:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:08:53,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:08:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:08:53,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 444 [2023-11-12 02:08:53,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 02:08:53,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:08:53,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 444 [2023-11-12 02:08:53,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:08:53,648 INFO L124 PetriNetUnfolderBase]: 732/1218 cut-off events. [2023-11-12 02:08:53,649 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2023-11-12 02:08:53,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2937 conditions, 1218 events. 732/1218 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6361 event pairs, 209 based on Foata normal form. 30/1135 useless extension candidates. Maximal degree in co-relation 884. Up to 775 conditions per place. [2023-11-12 02:08:53,663 INFO L140 encePairwiseOnDemand]: 438/444 looper letters, 74 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2023-11-12 02:08:53,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 389 flow [2023-11-12 02:08:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:08:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:08:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 611 transitions. [2023-11-12 02:08:53,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587087087087087 [2023-11-12 02:08:53,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 611 transitions. [2023-11-12 02:08:53,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 611 transitions. [2023-11-12 02:08:53,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:08:53,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 611 transitions. [2023-11-12 02:08:53,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 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 02:08:53,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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 02:08:53,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 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 02:08:53,677 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 138 flow. Second operand 3 states and 611 transitions. [2023-11-12 02:08:53,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 389 flow [2023-11-12 02:08:53,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 84 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:08:53,682 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 170 flow [2023-11-12 02:08:53,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2023-11-12 02:08:53,686 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2023-11-12 02:08:53,686 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 170 flow [2023-11-12 02:08:53,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 02:08:53,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:08:53,687 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-12 02:08:53,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:08:53,688 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 6 more)] === [2023-11-12 02:08:53,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:08:53,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1688212334, now seen corresponding path program 1 times [2023-11-12 02:08:53,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:08:53,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199152148] [2023-11-12 02:08:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:08:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:08:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:53,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:08:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:08:53,739 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:08:53,740 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:08:53,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-12 02:08:53,744 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 10 remaining) [2023-11-12 02:08:53,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 10 remaining) [2023-11-12 02:08:53,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 10 remaining) [2023-11-12 02:08:53,745 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 10 remaining) [2023-11-12 02:08:53,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 10 remaining) [2023-11-12 02:08:53,746 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 10 remaining) [2023-11-12 02:08:53,747 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 10 remaining) [2023-11-12 02:08:53,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 10 remaining) [2023-11-12 02:08:53,748 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 10 remaining) [2023-11-12 02:08:53,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:08:53,754 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-12 02:08:53,755 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:08:53,755 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-12 02:08:53,821 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:08:53,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:53,939 INFO L124 PetriNetUnfolderBase]: 40/350 cut-off events. [2023-11-12 02:08:53,939 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:08:53,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 350 events. 40/350 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1272 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 295. Up to 8 conditions per place. [2023-11-12 02:08:53,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:53,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:53,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:08:53,953 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:53,953 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:53,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 313 transitions, 644 flow [2023-11-12 02:08:54,022 INFO L124 PetriNetUnfolderBase]: 40/350 cut-off events. [2023-11-12 02:08:54,022 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-12 02:08:54,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 350 events. 40/350 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1272 event pairs, 0 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 295. Up to 8 conditions per place. [2023-11-12 02:08:54,062 INFO L119 LiptonReduction]: Number of co-enabled transitions 61476 [2023-11-12 02:09:01,586 INFO L134 LiptonReduction]: Checked pairs total: 80771 [2023-11-12 02:09:01,587 INFO L136 LiptonReduction]: Total number of compositions: 326 [2023-11-12 02:09:01,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:09:01,591 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;@1559c9a1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:09:01,591 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-12 02:09:01,595 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:09:01,596 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2023-11-12 02:09:01,596 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:09:01,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:01,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:01,596 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-12 02:09:01,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash -487040108, now seen corresponding path program 1 times [2023-11-12 02:09:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:01,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774602157] [2023-11-12 02:09:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:01,688 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 02:09:01,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774602157] [2023-11-12 02:09:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774602157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:01,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:01,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:09:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651920597] [2023-11-12 02:09:01,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:01,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:01,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 639 [2023-11-12 02:09:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 78 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 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 02:09:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:09:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 639 [2023-11-12 02:09:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:09:09,045 INFO L124 PetriNetUnfolderBase]: 38030/52422 cut-off events. [2023-11-12 02:09:09,046 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-11-12 02:09:09,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105034 conditions, 52422 events. 38030/52422 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 344086 event pairs, 17755 based on Foata normal form. 0/40487 useless extension candidates. Maximal degree in co-relation 17609. Up to 36048 conditions per place. [2023-11-12 02:09:09,518 INFO L140 encePairwiseOnDemand]: 620/639 looper letters, 189 selfloop transitions, 16 changer transitions 0/212 dead transitions. [2023-11-12 02:09:09,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 212 transitions, 888 flow [2023-11-12 02:09:09,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:09:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:09:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1494 transitions. [2023-11-12 02:09:09,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4676056338028169 [2023-11-12 02:09:09,525 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1494 transitions. [2023-11-12 02:09:09,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1494 transitions. [2023-11-12 02:09:09,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:09:09,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1494 transitions. [2023-11-12 02:09:09,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.8) internal successors, (1494), 5 states have internal predecessors, (1494), 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 02:09:09,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 639.0) internal successors, (3834), 6 states have internal predecessors, (3834), 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 02:09:09,543 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 639.0) internal successors, (3834), 6 states have internal predecessors, (3834), 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 02:09:09,543 INFO L175 Difference]: Start difference. First operand has 67 places, 78 transitions, 174 flow. Second operand 5 states and 1494 transitions. [2023-11-12 02:09:09,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 212 transitions, 888 flow [2023-11-12 02:09:09,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 212 transitions, 880 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-12 02:09:09,559 INFO L231 Difference]: Finished difference. Result has 74 places, 85 transitions, 284 flow [2023-11-12 02:09:09,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=85} [2023-11-12 02:09:09,562 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-11-12 02:09:09,563 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 85 transitions, 284 flow [2023-11-12 02:09:09,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 254.25) internal successors, (1017), 4 states have internal predecessors, (1017), 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 02:09:09,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:09,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:09,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:09:09,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-12 02:09:09,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:09,565 INFO L85 PathProgramCache]: Analyzing trace with hash 407330070, now seen corresponding path program 1 times [2023-11-12 02:09:09,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:09,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346533607] [2023-11-12 02:09:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:09,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:09,627 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 02:09:09,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:09,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346533607] [2023-11-12 02:09:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346533607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:09,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:09,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:09:09,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273423016] [2023-11-12 02:09:09,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:09,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:09:09,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:09:09,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:09:09,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 639 [2023-11-12 02:09:09,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 85 transitions, 284 flow. Second operand has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 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 02:09:09,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:09:09,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 639 [2023-11-12 02:09:09,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:09:13,994 INFO L124 PetriNetUnfolderBase]: 24950/34742 cut-off events. [2023-11-12 02:09:13,994 INFO L125 PetriNetUnfolderBase]: For 23162/23191 co-relation queries the response was YES. [2023-11-12 02:09:14,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90978 conditions, 34742 events. 24950/34742 cut-off events. For 23162/23191 co-relation queries the response was YES. Maximal size of possible extension queue 1473. Compared 222922 event pairs, 4337 based on Foata normal form. 429/31620 useless extension candidates. Maximal degree in co-relation 86318. Up to 21415 conditions per place. [2023-11-12 02:09:14,299 INFO L140 encePairwiseOnDemand]: 626/639 looper letters, 211 selfloop transitions, 20 changer transitions 0/237 dead transitions. [2023-11-12 02:09:14,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 237 transitions, 1249 flow [2023-11-12 02:09:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:09:14,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:09:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1453 transitions. [2023-11-12 02:09:14,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454773082942097 [2023-11-12 02:09:14,307 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1453 transitions. [2023-11-12 02:09:14,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1453 transitions. [2023-11-12 02:09:14,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:09:14,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1453 transitions. [2023-11-12 02:09:14,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 290.6) internal successors, (1453), 5 states have internal predecessors, (1453), 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 02:09:14,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 639.0) internal successors, (3834), 6 states have internal predecessors, (3834), 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 02:09:14,327 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 639.0) internal successors, (3834), 6 states have internal predecessors, (3834), 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 02:09:14,327 INFO L175 Difference]: Start difference. First operand has 74 places, 85 transitions, 284 flow. Second operand 5 states and 1453 transitions. [2023-11-12 02:09:14,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 237 transitions, 1249 flow [2023-11-12 02:09:14,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 237 transitions, 1249 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:09:14,420 INFO L231 Difference]: Finished difference. Result has 82 places, 100 transitions, 444 flow [2023-11-12 02:09:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=444, PETRI_PLACES=82, PETRI_TRANSITIONS=100} [2023-11-12 02:09:14,424 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-11-12 02:09:14,424 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 100 transitions, 444 flow [2023-11-12 02:09:14,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 252.5) internal successors, (1010), 4 states have internal predecessors, (1010), 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 02:09:14,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:14,425 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:09:14,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:09:14,426 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-12 02:09:14,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash -827858055, now seen corresponding path program 1 times [2023-11-12 02:09:14,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:14,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950747732] [2023-11-12 02:09:14,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:14,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:09:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:09:14,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:09:14,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950747732] [2023-11-12 02:09:14,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950747732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:09:14,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:09:14,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:09:14,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896068882] [2023-11-12 02:09:14,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:09:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:09:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:09:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:09:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:09:14,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 639 [2023-11-12 02:09:14,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 100 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 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 02:09:14,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:09:14,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 639 [2023-11-12 02:09:14,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:09:19,565 INFO L124 PetriNetUnfolderBase]: 26276/37010 cut-off events. [2023-11-12 02:09:19,566 INFO L125 PetriNetUnfolderBase]: For 40375/40696 co-relation queries the response was YES. [2023-11-12 02:09:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106477 conditions, 37010 events. 26276/37010 cut-off events. For 40375/40696 co-relation queries the response was YES. Maximal size of possible extension queue 1644. Compared 246966 event pairs, 8035 based on Foata normal form. 1312/34949 useless extension candidates. Maximal degree in co-relation 101229. Up to 17149 conditions per place. [2023-11-12 02:09:19,881 INFO L140 encePairwiseOnDemand]: 627/639 looper letters, 221 selfloop transitions, 30 changer transitions 0/259 dead transitions. [2023-11-12 02:09:19,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 259 transitions, 1538 flow [2023-11-12 02:09:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:09:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:09:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1698 transitions. [2023-11-12 02:09:19,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4428794992175274 [2023-11-12 02:09:19,901 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1698 transitions. [2023-11-12 02:09:19,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1698 transitions. [2023-11-12 02:09:19,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:09:19,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1698 transitions. [2023-11-12 02:09:20,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 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 02:09:20,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 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 02:09:20,160 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 639.0) internal successors, (4473), 7 states have internal predecessors, (4473), 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 02:09:20,160 INFO L175 Difference]: Start difference. First operand has 82 places, 100 transitions, 444 flow. Second operand 6 states and 1698 transitions. [2023-11-12 02:09:20,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 259 transitions, 1538 flow [2023-11-12 02:09:20,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 259 transitions, 1538 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:09:20,285 INFO L231 Difference]: Finished difference. Result has 91 places, 114 transitions, 689 flow [2023-11-12 02:09:20,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=639, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=91, PETRI_TRANSITIONS=114} [2023-11-12 02:09:20,287 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 24 predicate places. [2023-11-12 02:09:20,288 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 114 transitions, 689 flow [2023-11-12 02:09:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.66666666666666) internal successors, (1498), 6 states have internal predecessors, (1498), 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 02:09:20,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:09:20,291 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-12 02:09:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:09:20,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err2ASSERT_VIOLATIONERROR_FUNCTION, thr1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 9 more)] === [2023-11-12 02:09:20,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:09:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash -358739894, now seen corresponding path program 1 times [2023-11-12 02:09:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:09:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591656101] [2023-11-12 02:09:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:09:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:09:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:20,311 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:09:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:09:20,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:09:20,343 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:09:20,343 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-12 02:09:20,343 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (11 of 13 remaining) [2023-11-12 02:09:20,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (10 of 13 remaining) [2023-11-12 02:09:20,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (9 of 13 remaining) [2023-11-12 02:09:20,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (8 of 13 remaining) [2023-11-12 02:09:20,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (7 of 13 remaining) [2023-11-12 02:09:20,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (6 of 13 remaining) [2023-11-12 02:09:20,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 13 remaining) [2023-11-12 02:09:20,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (4 of 13 remaining) [2023-11-12 02:09:20,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (3 of 13 remaining) [2023-11-12 02:09:20,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 13 remaining) [2023-11-12 02:09:20,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONERROR_FUNCTION (1 of 13 remaining) [2023-11-12 02:09:20,346 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 13 remaining) [2023-11-12 02:09:20,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:09:20,346 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-12 02:09:20,348 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-12 02:09:20,348 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-12 02:09:20,417 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-12 02:09:20,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,579 INFO L124 PetriNetUnfolderBase]: 53/458 cut-off events. [2023-11-12 02:09:20,579 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:09:20,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 458 events. 53/458 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1898 event pairs, 0 based on Foata normal form. 0/388 useless extension candidates. Maximal degree in co-relation 389. Up to 10 conditions per place. [2023-11-12 02:09:20,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,604 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:09:20,604 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 408 transitions, 844 flow [2023-11-12 02:09:20,759 INFO L124 PetriNetUnfolderBase]: 53/458 cut-off events. [2023-11-12 02:09:20,759 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-12 02:09:20,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 458 events. 53/458 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1898 event pairs, 0 based on Foata normal form. 0/388 useless extension candidates. Maximal degree in co-relation 389. Up to 10 conditions per place. [2023-11-12 02:09:20,822 INFO L119 LiptonReduction]: Number of co-enabled transitions 117688