./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:34:56,903 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:34:57,038 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:34:57,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:34:57,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:34:57,088 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:34:57,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:34:57,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:34:57,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:34:57,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:34:57,097 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:34:57,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:34:57,098 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:34:57,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:34:57,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:34:57,100 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:34:57,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:34:57,101 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:34:57,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:34:57,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:34:57,103 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:34:57,103 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:34:57,104 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:34:57,104 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:34:57,105 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:34:57,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:34:57,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:34:57,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:34:57,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:34:57,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:34:57,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:34:57,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:34:57,110 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:34:57,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:34:57,110 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:34:57,111 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:34:57,111 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:34:57,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:34:57,112 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:34:57,112 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_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d05018e114128995041419dca600f2451b0df342be45761a900c0d0704b1b40b [2023-11-19 07:34:57,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:34:57,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:34:57,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:34:57,450 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:34:57,450 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:34:57,452 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-19 07:35:00,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:00,986 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:00,987 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i [2023-11-19 07:35:01,017 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/data/1902ecf29/d847372213c84bef895b65a608e4affc/FLAGe23f7ef01 [2023-11-19 07:35:01,036 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/data/1902ecf29/d847372213c84bef895b65a608e4affc [2023-11-19 07:35:01,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:01,045 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:01,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:01,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:01,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:01,056 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3952cdb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01, skipping insertion in model container [2023-11-19 07:35:01,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,130 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:01,526 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_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30907,30920] [2023-11-19 07:35:01,537 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:01,551 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:01,631 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_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/sv-benchmarks/c/pthread-ext/37_stack_lock_p0_vs_concur.i[30907,30920] [2023-11-19 07:35:01,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:01,689 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:01,689 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:01,698 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:01,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01 WrapperNode [2023-11-19 07:35:01,699 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:01,700 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:01,701 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:01,701 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:01,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,756 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,796 INFO L138 Inliner]: procedures = 173, calls = 30, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 86 [2023-11-19 07:35:01,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:01,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:01,798 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:01,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:01,810 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,819 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,833 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,845 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,849 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:01,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:01,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:01,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:01,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (1/1) ... [2023-11-19 07:35:01,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:01,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a477a94-2ff0-40a3-bb8b-92e9b2a71c44/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:01,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:01,950 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:35:01,951 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:35:01,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:01,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:35:01,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:01,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:01,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:01,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:01,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:35:01,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:01,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:01,958 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:35:02,177 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:02,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:02,512 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:02,623 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:02,623 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:35:02,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:02 BoogieIcfgContainer [2023-11-19 07:35:02,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:02,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:02,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:02,634 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:02,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:01" (1/3) ... [2023-11-19 07:35:02,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba1d3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:02, skipping insertion in model container [2023-11-19 07:35:02,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:01" (2/3) ... [2023-11-19 07:35:02,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba1d3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:02, skipping insertion in model container [2023-11-19 07:35:02,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:02" (3/3) ... [2023-11-19 07:35:02,638 INFO L112 eAbstractionObserver]: Analyzing ICFG 37_stack_lock_p0_vs_concur.i [2023-11-19 07:35:02,664 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:02,691 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:02,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:02,691 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:02,768 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:35:02,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,862 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-11-19 07:35:02,863 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-19 07:35:02,876 INFO L82 GeneralOperation]: Start removeDead. Operand has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,882 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:02,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,902 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 68 places, 71 transitions, 146 flow [2023-11-19 07:35:02,935 INFO L124 PetriNetUnfolderBase]: 7/82 cut-off events. [2023-11-19 07:35:02,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:02,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 82 events. 7/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 97 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 56. Up to 4 conditions per place. [2023-11-19 07:35:02,939 INFO L119 LiptonReduction]: Number of co-enabled transitions 1204 [2023-11-19 07:35:04,681 INFO L134 LiptonReduction]: Checked pairs total: 1421 [2023-11-19 07:35:04,682 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-11-19 07:35:04,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:04,726 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;@5430b5b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:04,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:35:04,736 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:04,736 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-11-19 07:35:04,737 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:35:04,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:04,738 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:35:04,738 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:35:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1277025706, now seen corresponding path program 1 times [2023-11-19 07:35:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:04,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264707773] [2023-11-19 07:35:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:04,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:04,984 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:04,986 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:04,988 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-19 07:35:04,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-19 07:35:04,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-19 07:35:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:04,993 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-19 07:35:05,002 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:05,003 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:35:05,059 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:35:05,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,174 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-11-19 07:35:05,174 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:05,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 13/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-19 07:35:05,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,181 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,182 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:05,182 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 240 flow [2023-11-19 07:35:05,230 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-11-19 07:35:05,231 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:05,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 13/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 6 conditions per place. [2023-11-19 07:35:05,242 INFO L119 LiptonReduction]: Number of co-enabled transitions 6192 [2023-11-19 07:35:07,005 INFO L134 LiptonReduction]: Checked pairs total: 15598 [2023-11-19 07:35:07,005 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-11-19 07:35:07,008 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:07,010 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;@5430b5b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:07,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-19 07:35:07,014 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:07,014 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-11-19 07:35:07,015 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:07,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:07,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:07,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:35:07,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 336001978, now seen corresponding path program 1 times [2023-11-19 07:35:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:07,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440720208] [2023-11-19 07:35:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:07,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:07,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440720208] [2023-11-19 07:35:07,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440720208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:07,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:07,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:07,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801707930] [2023-11-19 07:35:07,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:07,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:35:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:35:07,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:07,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 204 [2023-11-19 07:35:07,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 50 transitions, 110 flow. Second operand has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:07,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 204 [2023-11-19 07:35:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:07,426 INFO L124 PetriNetUnfolderBase]: 475/929 cut-off events. [2023-11-19 07:35:07,426 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-19 07:35:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 929 events. 475/929 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 5073 event pairs, 399 based on Foata normal form. 24/841 useless extension candidates. Maximal degree in co-relation 1342. Up to 786 conditions per place. [2023-11-19 07:35:07,441 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 27 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-11-19 07:35:07,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 148 flow [2023-11-19 07:35:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:35:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:35:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 215 transitions. [2023-11-19 07:35:07,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5269607843137255 [2023-11-19 07:35:07,464 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 215 transitions. [2023-11-19 07:35:07,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 215 transitions. [2023-11-19 07:35:07,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:07,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 215 transitions. [2023-11-19 07:35:07,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,487 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,490 INFO L175 Difference]: Start difference. First operand has 49 places, 50 transitions, 110 flow. Second operand 2 states and 215 transitions. [2023-11-19 07:35:07,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 148 flow [2023-11-19 07:35:07,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:07,498 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 94 flow [2023-11-19 07:35:07,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2023-11-19 07:35:07,505 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2023-11-19 07:35:07,506 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 94 flow [2023-11-19 07:35:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:07,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:07,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:35:07,511 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:35:07,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1822548471, now seen corresponding path program 1 times [2023-11-19 07:35:07,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:07,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317877763] [2023-11-19 07:35:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317877763] [2023-11-19 07:35:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317877763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:07,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:07,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:07,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676087514] [2023-11-19 07:35:07,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:07,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:07,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:07,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:07,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 204 [2023-11-19 07:35:07,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:07,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:07,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 204 [2023-11-19 07:35:07,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:07,995 INFO L124 PetriNetUnfolderBase]: 449/870 cut-off events. [2023-11-19 07:35:07,996 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-19 07:35:07,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1672 conditions, 870 events. 449/870 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4687 event pairs, 364 based on Foata normal form. 26/785 useless extension candidates. Maximal degree in co-relation 1667. Up to 697 conditions per place. [2023-11-19 07:35:08,004 INFO L140 encePairwiseOnDemand]: 202/204 looper letters, 38 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-11-19 07:35:08,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 201 flow [2023-11-19 07:35:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:08,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 307 transitions. [2023-11-19 07:35:08,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016339869281046 [2023-11-19 07:35:08,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 307 transitions. [2023-11-19 07:35:08,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 307 transitions. [2023-11-19 07:35:08,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:08,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 307 transitions. [2023-11-19 07:35:08,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:08,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:08,021 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:08,021 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 94 flow. Second operand 3 states and 307 transitions. [2023-11-19 07:35:08,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 201 flow [2023-11-19 07:35:08,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 54 transitions, 201 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:08,024 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 94 flow [2023-11-19 07:35:08,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-11-19 07:35:08,026 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, -2 predicate places. [2023-11-19 07:35:08,026 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 94 flow [2023-11-19 07:35:08,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:08,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:08,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:35:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:35:08,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-19 07:35:08,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:08,029 INFO L85 PathProgramCache]: Analyzing trace with hash -668240569, now seen corresponding path program 1 times [2023-11-19 07:35:08,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:08,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038522994] [2023-11-19 07:35:08,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:08,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:08,076 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:08,110 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:08,111 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:08,111 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-19 07:35:08,113 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-19 07:35:08,114 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-19 07:35:08,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-19 07:35:08,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:35:08,119 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:35:08,120 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:08,122 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:35:08,166 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:35:08,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,212 INFO L124 PetriNetUnfolderBase]: 19/196 cut-off events. [2023-11-19 07:35:08,212 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:35:08,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 19/196 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 563 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-11-19 07:35:08,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:08,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,218 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 159 transitions, 336 flow [2023-11-19 07:35:08,258 INFO L124 PetriNetUnfolderBase]: 19/196 cut-off events. [2023-11-19 07:35:08,258 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:35:08,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 196 events. 19/196 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 563 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-11-19 07:35:08,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 14964 [2023-11-19 07:35:10,460 INFO L134 LiptonReduction]: Checked pairs total: 37666 [2023-11-19 07:35:10,460 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-11-19 07:35:10,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:10,464 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;@5430b5b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:10,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-19 07:35:10,469 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:10,469 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-11-19 07:35:10,469 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:35:10,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:10,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:10,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:35:10,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash 94285696, now seen corresponding path program 1 times [2023-11-19 07:35:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:10,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142352200] [2023-11-19 07:35:10,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:10,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:10,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142352200] [2023-11-19 07:35:10,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142352200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:10,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:10,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:10,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798243564] [2023-11-19 07:35:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:10,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:10,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:10,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:10,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:10,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 279 [2023-11-19 07:35:10,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:10,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 279 [2023-11-19 07:35:10,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:13,340 INFO L124 PetriNetUnfolderBase]: 10115/14968 cut-off events. [2023-11-19 07:35:13,341 INFO L125 PetriNetUnfolderBase]: For 940/940 co-relation queries the response was YES. [2023-11-19 07:35:13,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29711 conditions, 14968 events. 10115/14968 cut-off events. For 940/940 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 95657 event pairs, 8162 based on Foata normal form. 310/13518 useless extension candidates. Maximal degree in co-relation 11954. Up to 13037 conditions per place. [2023-11-19 07:35:13,515 INFO L140 encePairwiseOnDemand]: 272/279 looper letters, 65 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-11-19 07:35:13,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 85 transitions, 332 flow [2023-11-19 07:35:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:13,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-11-19 07:35:13,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173237753882916 [2023-11-19 07:35:13,519 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-11-19 07:35:13,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-11-19 07:35:13,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:13,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-11-19 07:35:13,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,530 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 150 flow. Second operand 3 states and 433 transitions. [2023-11-19 07:35:13,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 85 transitions, 332 flow [2023-11-19 07:35:13,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 328 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:13,536 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 136 flow [2023-11-19 07:35:13,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-11-19 07:35:13,538 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2023-11-19 07:35:13,538 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 136 flow [2023-11-19 07:35:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:13,539 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 07:35:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:35:13,540 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-19 07:35:13,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1761565953, now seen corresponding path program 1 times [2023-11-19 07:35:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394723410] [2023-11-19 07:35:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:13,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:13,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:35:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:35:13,583 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:35:13,583 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:35:13,583 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-19 07:35:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-19 07:35:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-19 07:35:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-19 07:35:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-19 07:35:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:35:13,585 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:35:13,585 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:35:13,586 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 07:35:13,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:35:13,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,681 INFO L124 PetriNetUnfolderBase]: 25/253 cut-off events. [2023-11-19 07:35:13,681 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:35:13,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 25/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-11-19 07:35:13,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,687 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:13,687 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,688 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 203 transitions, 434 flow [2023-11-19 07:35:13,732 INFO L124 PetriNetUnfolderBase]: 25/253 cut-off events. [2023-11-19 07:35:13,732 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 07:35:13,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 25/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 204. Up to 10 conditions per place. [2023-11-19 07:35:13,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 27520 [2023-11-19 07:35:16,555 INFO L134 LiptonReduction]: Checked pairs total: 73824 [2023-11-19 07:35:16,555 INFO L136 LiptonReduction]: Total number of compositions: 153 [2023-11-19 07:35:16,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:16,559 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;@5430b5b2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:16,559 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-19 07:35:16,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:16,563 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-11-19 07:35:16,563 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:35:16,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:16,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:16,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:35:16,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1785831137, now seen corresponding path program 1 times [2023-11-19 07:35:16,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162775920] [2023-11-19 07:35:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162775920] [2023-11-19 07:35:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162775920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:16,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:16,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:35:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749165205] [2023-11-19 07:35:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:16,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:35:16,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:16,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:35:16,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:35:16,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 356 [2023-11-19 07:35:16,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 208 flow. Second operand has 2 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:16,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 356 [2023-11-19 07:35:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:44,977 INFO L124 PetriNetUnfolderBase]: 167361/226209 cut-off events. [2023-11-19 07:35:44,978 INFO L125 PetriNetUnfolderBase]: For 20370/20370 co-relation queries the response was YES. [2023-11-19 07:35:45,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450943 conditions, 226209 events. 167361/226209 cut-off events. For 20370/20370 co-relation queries the response was YES. Maximal size of possible extension queue 5375. Compared 1626963 event pairs, 148273 based on Foata normal form. 7025/203732 useless extension candidates. Maximal degree in co-relation 71286. Up to 214860 conditions per place. [2023-11-19 07:35:46,896 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 52 selfloop transitions, 0 changer transitions 0/77 dead transitions. [2023-11-19 07:35:46,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 77 transitions, 286 flow [2023-11-19 07:35:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:35:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:35:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 376 transitions. [2023-11-19 07:35:46,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5280898876404494 [2023-11-19 07:35:46,900 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 376 transitions. [2023-11-19 07:35:46,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 376 transitions. [2023-11-19 07:35:46,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:46,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 376 transitions. [2023-11-19 07:35:46,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,907 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,907 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 208 flow. Second operand 2 states and 376 transitions. [2023-11-19 07:35:46,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 77 transitions, 286 flow [2023-11-19 07:35:46,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 77 transitions, 280 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:46,940 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 176 flow [2023-11-19 07:35:46,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=176, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-11-19 07:35:46,941 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -7 predicate places. [2023-11-19 07:35:46,941 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 176 flow [2023-11-19 07:35:46,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 160.5) internal successors, (321), 2 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:46,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:46,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:35:46,943 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-19 07:35:46,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1249996002, now seen corresponding path program 1 times [2023-11-19 07:35:46,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:46,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186102305] [2023-11-19 07:35:46,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:46,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:47,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186102305] [2023-11-19 07:35:47,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186102305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:47,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:47,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:35:47,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677405958] [2023-11-19 07:35:47,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:47,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:35:47,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:35:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:35:47,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 356 [2023-11-19 07:35:47,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 176 flow. Second operand has 4 states, 4 states have (on average 153.5) internal successors, (614), 4 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:47,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 356 [2023-11-19 07:35:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand