./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx --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 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:59:42,961 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:59:43,073 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 20:59:43,082 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:59:43,083 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:59:43,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:59:43,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:59:43,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:59:43,127 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 20:59:43,132 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 20:59:43,133 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:59:43,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:59:43,134 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:59:43,136 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:59:43,136 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:59:43,137 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:59:43,137 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 20:59:43,137 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:59:43,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:59:43,138 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:59:43,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:59:43,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 20:59:43,140 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:59:43,140 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 20:59:43,140 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:59:43,141 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 20:59:43,141 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:59:43,142 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:59:43,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:59:43,143 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:59:43,144 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:59:43,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:43,145 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:59:43,145 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:59:43,145 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 20:59:43,146 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:59:43,146 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:59:43,146 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:59:43,146 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:59:43,146 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 20:59:43,147 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:59:43,147 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:59:43,147 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_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43a7b886f1e454dafac7facab2674c64a0fa591a6bf106acb1f8b320d6c92508 [2023-11-21 20:59:43,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:59:43,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:59:43,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:59:43,471 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:59:43,471 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:59:43,473 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2023-11-21 20:59:46,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:59:46,969 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:59:46,970 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i [2023-11-21 20:59:46,994 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/data/08bc0c40c/6c3f7ed2af8d4e4d82837186e61e2c61/FLAG849bb5367 [2023-11-21 20:59:47,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/data/08bc0c40c/6c3f7ed2af8d4e4d82837186e61e2c61 [2023-11-21 20:59:47,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:59:47,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:59:47,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:47,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:59:47,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:59:47,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5afecb47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47, skipping insertion in model container [2023-11-21 20:59:47,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,097 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:59:47,300 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:59:47,540 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_b875b5dd-aa5a-41d0-beda-277253a13b7e/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2023-11-21 20:59:47,551 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:47,561 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:59:47,576 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-21 20:59:47,597 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_b875b5dd-aa5a-41d0-beda-277253a13b7e/sv-benchmarks/c/pthread-ext/45_monabsex1_vs.i[30633,30646] [2023-11-21 20:59:47,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:59:47,648 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:47,648 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:47,648 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 20:59:47,657 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:59:47,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47 WrapperNode [2023-11-21 20:59:47,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:59:47,659 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:47,659 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:59:47,659 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:59:47,667 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,691 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,715 INFO L138 Inliner]: procedures = 171, calls = 15, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-11-21 20:59:47,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:59:47,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:59:47,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:59:47,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:59:47,729 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,729 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,736 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,758 INFO L187 HeapSplitter]: Split 3 memory accesses to 2 slices as follows [2, 1] [2023-11-21 20:59:47,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,793 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:59:47,794 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:59:47,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:59:47,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:59:47,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (1/1) ... [2023-11-21 20:59:47,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:59:47,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:59:47,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:59:47,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b875b5dd-aa5a-41d0-beda-277253a13b7e/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:59:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-21 20:59:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-21 20:59:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 20:59:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 20:59:47,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 20:59:47,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:59:47,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:59:47,979 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 20:59:48,133 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:59:48,136 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:59:48,254 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:59:48,348 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:59:48,349 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 20:59:48,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:48 BoogieIcfgContainer [2023-11-21 20:59:48,351 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:59:48,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:59:48,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:59:48,357 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:59:48,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:59:47" (1/3) ... [2023-11-21 20:59:48,362 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5049e564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:48, skipping insertion in model container [2023-11-21 20:59:48,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:59:47" (2/3) ... [2023-11-21 20:59:48,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5049e564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:59:48, skipping insertion in model container [2023-11-21 20:59:48,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:59:48" (3/3) ... [2023-11-21 20:59:48,364 INFO L112 eAbstractionObserver]: Analyzing ICFG 45_monabsex1_vs.i [2023-11-21 20:59:48,375 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-21 20:59:48,385 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:59:48,385 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 20:59:48,386 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 20:59:48,427 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 20:59:48,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 14 places, 11 transitions, 26 flow [2023-11-21 20:59:48,492 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-11-21 20:59:48,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 20:59:48,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 13 events. 0/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-11-21 20:59:48,495 INFO L82 GeneralOperation]: Start removeDead. Operand has 14 places, 11 transitions, 26 flow [2023-11-21 20:59:48,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 14 places, 11 transitions, 26 flow [2023-11-21 20:59:48,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:48,516 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;@1cc3f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:48,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-21 20:59:48,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:59:48,524 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-21 20:59:48,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 20:59:48,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:48,525 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-21 20:59:48,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 20:59:48,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash -361945663, now seen corresponding path program 1 times [2023-11-21 20:59:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130446652] [2023-11-21 20:59:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:48,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:48,703 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 20:59:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:48,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 20:59:48,773 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 20:59:48,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-21 20:59:48,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-21 20:59:48,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-21 20:59:48,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:59:48,780 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-21 20:59:48,793 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 20:59:48,793 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 20:59:48,843 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 20:59:48,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 17 transitions, 44 flow [2023-11-21 20:59:48,861 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-11-21 20:59:48,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 20:59:48,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 22 events. 0/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-11-21 20:59:48,861 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 17 transitions, 44 flow [2023-11-21 20:59:48,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 17 transitions, 44 flow [2023-11-21 20:59:48,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:48,865 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;@1cc3f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:48,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-21 20:59:48,873 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:59:48,874 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-21 20:59:48,874 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 20:59:48,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:48,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 20:59:48,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-21 20:59:48,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash 141129114, now seen corresponding path program 1 times [2023-11-21 20:59:48,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:48,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858629103] [2023-11-21 20:59:48,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:48,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858629103] [2023-11-21 20:59:49,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858629103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:49,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:49,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:59:49,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901119444] [2023-11-21 20:59:49,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:49,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:49,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:49,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:49,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 17 [2023-11-21 20:59:49,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:49,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:49,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 17 [2023-11-21 20:59:49,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:49,323 INFO L124 PetriNetUnfolderBase]: 186/343 cut-off events. [2023-11-21 20:59:49,323 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-11-21 20:59:49,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 343 events. 186/343 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1362 event pairs, 81 based on Foata normal form. 0/304 useless extension candidates. Maximal degree in co-relation 532. Up to 186 conditions per place. [2023-11-21 20:59:49,331 INFO L140 encePairwiseOnDemand]: 12/17 looper letters, 22 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-11-21 20:59:49,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 26 transitions, 117 flow [2023-11-21 20:59:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2023-11-21 20:59:49,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2023-11-21 20:59:49,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 31 transitions. [2023-11-21 20:59:49,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 31 transitions. [2023-11-21 20:59:49,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:49,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 31 transitions. [2023-11-21 20:59:49,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-21 20:59:49,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-21 20:59:49,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-11-21 20:59:49,354 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 44 flow. Second operand 3 states and 31 transitions. [2023-11-21 20:59:49,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 26 transitions, 117 flow [2023-11-21 20:59:49,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 26 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:49,360 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 64 flow [2023-11-21 20:59:49,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=17, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-21 20:59:49,366 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-11-21 20:59:49,366 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 64 flow [2023-11-21 20:59:49,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:49,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:49,367 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1] [2023-11-21 20:59:49,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:59:49,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-21 20:59:49,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:49,368 INFO L85 PathProgramCache]: Analyzing trace with hash -605841371, now seen corresponding path program 1 times [2023-11-21 20:59:49,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:49,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834094358] [2023-11-21 20:59:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:49,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:49,393 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 20:59:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:49,431 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 20:59:49,431 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 20:59:49,431 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-21 20:59:49,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-21 20:59:49,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-21 20:59:49,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-21 20:59:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 20:59:49,433 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-21 20:59:49,434 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 20:59:49,434 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 20:59:49,461 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 20:59:49,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 23 transitions, 64 flow [2023-11-21 20:59:49,486 INFO L124 PetriNetUnfolderBase]: 0/31 cut-off events. [2023-11-21 20:59:49,486 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-21 20:59:49,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 31 events. 0/31 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-21 20:59:49,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 23 transitions, 64 flow [2023-11-21 20:59:49,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 64 flow [2023-11-21 20:59:49,488 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:49,490 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;@1cc3f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:49,490 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-21 20:59:49,493 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:59:49,493 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-11-21 20:59:49,494 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 20:59:49,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:49,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 20:59:49,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 20:59:49,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:49,495 INFO L85 PathProgramCache]: Analyzing trace with hash 821697557, now seen corresponding path program 1 times [2023-11-21 20:59:49,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:49,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329721943] [2023-11-21 20:59:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:49,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:49,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329721943] [2023-11-21 20:59:49,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329721943] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:49,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:49,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:59:49,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682496723] [2023-11-21 20:59:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:49,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:49,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:49,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2023-11-21 20:59:49,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:49,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:49,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2023-11-21 20:59:49,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:50,074 INFO L124 PetriNetUnfolderBase]: 2168/3256 cut-off events. [2023-11-21 20:59:50,074 INFO L125 PetriNetUnfolderBase]: For 310/310 co-relation queries the response was YES. [2023-11-21 20:59:50,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6709 conditions, 3256 events. 2168/3256 cut-off events. For 310/310 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16151 event pairs, 1121 based on Foata normal form. 0/2797 useless extension candidates. Maximal degree in co-relation 2848. Up to 2006 conditions per place. [2023-11-21 20:59:50,109 INFO L140 encePairwiseOnDemand]: 17/23 looper letters, 33 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2023-11-21 20:59:50,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 38 transitions, 180 flow [2023-11-21 20:59:50,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2023-11-21 20:59:50,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2023-11-21 20:59:50,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 43 transitions. [2023-11-21 20:59:50,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 43 transitions. [2023-11-21 20:59:50,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:50,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 43 transitions. [2023-11-21 20:59:50,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-11-21 20:59:50,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-21 20:59:50,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-21 20:59:50,116 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 64 flow. Second operand 3 states and 43 transitions. [2023-11-21 20:59:50,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 38 transitions, 180 flow [2023-11-21 20:59:50,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 38 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:50,124 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 90 flow [2023-11-21 20:59:50,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-11-21 20:59:50,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-11-21 20:59:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 90 flow [2023-11-21 20:59:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:50,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 20:59:50,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 20:59:50,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:50,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1963190746, now seen corresponding path program 1 times [2023-11-21 20:59:50,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934343100] [2023-11-21 20:59:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:50,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 20:59:50,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:50,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934343100] [2023-11-21 20:59:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934343100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:50,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:59:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180186713] [2023-11-21 20:59:50,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:50,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:50,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2023-11-21 20:59:50,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-21 20:59:50,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:50,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2023-11-21 20:59:50,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:50,753 INFO L124 PetriNetUnfolderBase]: 2741/4169 cut-off events. [2023-11-21 20:59:50,753 INFO L125 PetriNetUnfolderBase]: For 1525/1525 co-relation queries the response was YES. [2023-11-21 20:59:50,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9813 conditions, 4169 events. 2741/4169 cut-off events. For 1525/1525 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 22159 event pairs, 1310 based on Foata normal form. 0/3794 useless extension candidates. Maximal degree in co-relation 4625. Up to 2447 conditions per place. [2023-11-21 20:59:50,793 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-11-21 20:59:50,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 229 flow [2023-11-21 20:59:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2023-11-21 20:59:50,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2023-11-21 20:59:50,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 40 transitions. [2023-11-21 20:59:50,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 40 transitions. [2023-11-21 20:59:50,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:50,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 40 transitions. [2023-11-21 20:59:50,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 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) [2023-11-21 20:59:50,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-21 20:59:50,800 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2023-11-21 20:59:50,800 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 90 flow. Second operand 3 states and 40 transitions. [2023-11-21 20:59:50,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 229 flow [2023-11-21 20:59:50,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 215 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:50,819 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 130 flow [2023-11-21 20:59:50,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-11-21 20:59:50,822 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-21 20:59:50,823 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 130 flow [2023-11-21 20:59:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-21 20:59:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:50,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:50,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:59:50,827 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 20:59:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 788601910, now seen corresponding path program 1 times [2023-11-21 20:59:50,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:50,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273917416] [2023-11-21 20:59:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:59:50,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273917416] [2023-11-21 20:59:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273917416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:50,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:50,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:59:50,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195065850] [2023-11-21 20:59:50,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:50,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:50,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:50,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:50,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2023-11-21 20:59:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 130 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 20:59:50,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:50,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2023-11-21 20:59:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:52,033 INFO L124 PetriNetUnfolderBase]: 4577/7000 cut-off events. [2023-11-21 20:59:52,033 INFO L125 PetriNetUnfolderBase]: For 3878/3878 co-relation queries the response was YES. [2023-11-21 20:59:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18159 conditions, 7000 events. 4577/7000 cut-off events. For 3878/3878 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 42138 event pairs, 675 based on Foata normal form. 63/6445 useless extension candidates. Maximal degree in co-relation 18062. Up to 2364 conditions per place. [2023-11-21 20:59:52,112 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 74 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2023-11-21 20:59:52,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 93 transitions, 566 flow [2023-11-21 20:59:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:59:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 20:59:52,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2023-11-21 20:59:52,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2023-11-21 20:59:52,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 89 transitions. [2023-11-21 20:59:52,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 89 transitions. [2023-11-21 20:59:52,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:52,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 89 transitions. [2023-11-21 20:59:52,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 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) [2023-11-21 20:59:52,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2023-11-21 20:59:52,124 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 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) [2023-11-21 20:59:52,124 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 130 flow. Second operand 6 states and 89 transitions. [2023-11-21 20:59:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 93 transitions, 566 flow [2023-11-21 20:59:52,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 93 transitions, 532 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:52,148 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 277 flow [2023-11-21 20:59:52,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=277, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-11-21 20:59:52,152 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2023-11-21 20:59:52,153 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 277 flow [2023-11-21 20:59:52,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 20:59:52,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:52,153 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:52,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 20:59:52,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 20:59:52,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1135484470, now seen corresponding path program 2 times [2023-11-21 20:59:52,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:52,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383920877] [2023-11-21 20:59:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:52,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 20:59:52,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:52,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383920877] [2023-11-21 20:59:52,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383920877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:52,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:52,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:59:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228707805] [2023-11-21 20:59:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:52,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:52,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:52,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 23 [2023-11-21 20:59:52,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 277 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 20:59:52,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:52,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 23 [2023-11-21 20:59:52,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:53,432 INFO L124 PetriNetUnfolderBase]: 4871/7530 cut-off events. [2023-11-21 20:59:53,433 INFO L125 PetriNetUnfolderBase]: For 8593/8593 co-relation queries the response was YES. [2023-11-21 20:59:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22041 conditions, 7530 events. 4871/7530 cut-off events. For 8593/8593 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 46688 event pairs, 495 based on Foata normal form. 126/7176 useless extension candidates. Maximal degree in co-relation 11341. Up to 2717 conditions per place. [2023-11-21 20:59:53,497 INFO L140 encePairwiseOnDemand]: 14/23 looper letters, 82 selfloop transitions, 27 changer transitions 0/110 dead transitions. [2023-11-21 20:59:53,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 110 transitions, 778 flow [2023-11-21 20:59:53,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:59:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 20:59:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 98 transitions. [2023-11-21 20:59:53,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2023-11-21 20:59:53,500 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 98 transitions. [2023-11-21 20:59:53,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 98 transitions. [2023-11-21 20:59:53,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:53,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 98 transitions. [2023-11-21 20:59:53,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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) [2023-11-21 20:59:53,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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) [2023-11-21 20:59:53,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 23.0) internal successors, (184), 8 states have internal predecessors, (184), 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) [2023-11-21 20:59:53,503 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 277 flow. Second operand 7 states and 98 transitions. [2023-11-21 20:59:53,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 110 transitions, 778 flow [2023-11-21 20:59:53,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 110 transitions, 778 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:53,545 INFO L231 Difference]: Finished difference. Result has 52 places, 57 transitions, 509 flow [2023-11-21 20:59:53,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=509, PETRI_PLACES=52, PETRI_TRANSITIONS=57} [2023-11-21 20:59:53,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 22 predicate places. [2023-11-21 20:59:53,547 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 57 transitions, 509 flow [2023-11-21 20:59:53,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 20:59:53,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:53,547 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-11-21 20:59:53,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 20:59:53,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-21 20:59:53,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:53,549 INFO L85 PathProgramCache]: Analyzing trace with hash 487839968, now seen corresponding path program 1 times [2023-11-21 20:59:53,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:53,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706412606] [2023-11-21 20:59:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:53,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:53,565 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 20:59:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 20:59:53,581 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 20:59:53,581 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 20:59:53,582 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-21 20:59:53,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-21 20:59:53,582 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-21 20:59:53,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-21 20:59:53,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-21 20:59:53,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 20:59:53,584 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-11-21 20:59:53,584 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 20:59:53,585 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-21 20:59:53,610 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 20:59:53,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 29 transitions, 86 flow [2023-11-21 20:59:53,618 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2023-11-21 20:59:53,618 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-21 20:59:53,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 40 events. 0/40 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-11-21 20:59:53,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 29 transitions, 86 flow [2023-11-21 20:59:53,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 29 transitions, 86 flow [2023-11-21 20:59:53,621 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:59:53,622 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;@1cc3f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:59:53,622 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-21 20:59:53,625 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 20:59:53,625 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-11-21 20:59:53,625 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-21 20:59:53,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:53,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 20:59:53,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 20:59:53,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:53,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1679771701, now seen corresponding path program 1 times [2023-11-21 20:59:53,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:53,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309339036] [2023-11-21 20:59:53,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:53,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:53,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:59:53,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:53,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309339036] [2023-11-21 20:59:53,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309339036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:53,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:53,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:59:53,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766240827] [2023-11-21 20:59:53,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:53,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:53,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:53,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:53,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:53,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 20:59:53,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:53,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:53,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 20:59:53,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:56,167 INFO L124 PetriNetUnfolderBase]: 19320/26227 cut-off events. [2023-11-21 20:59:56,168 INFO L125 PetriNetUnfolderBase]: For 3879/3879 co-relation queries the response was YES. [2023-11-21 20:59:56,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54109 conditions, 26227 events. 19320/26227 cut-off events. For 3879/3879 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 142896 event pairs, 10749 based on Foata normal form. 0/22228 useless extension candidates. Maximal degree in co-relation 6695. Up to 17034 conditions per place. [2023-11-21 20:59:56,324 INFO L140 encePairwiseOnDemand]: 22/29 looper letters, 44 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-11-21 20:59:56,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 247 flow [2023-11-21 20:59:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-21 20:59:56,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632183908045977 [2023-11-21 20:59:56,331 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-21 20:59:56,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-21 20:59:56,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:56,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-21 20:59:56,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2023-11-21 20:59:56,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 20:59:56,333 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 20:59:56,334 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 86 flow. Second operand 3 states and 55 transitions. [2023-11-21 20:59:56,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 247 flow [2023-11-21 20:59:56,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 235 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-21 20:59:56,338 INFO L231 Difference]: Finished difference. Result has 41 places, 32 transitions, 116 flow [2023-11-21 20:59:56,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=32} [2023-11-21 20:59:56,341 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-11-21 20:59:56,341 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 32 transitions, 116 flow [2023-11-21 20:59:56,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:59:56,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:56,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:56,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 20:59:56,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 20:59:56,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1056939260, now seen corresponding path program 1 times [2023-11-21 20:59:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914771643] [2023-11-21 20:59:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:56,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 20:59:56,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:56,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914771643] [2023-11-21 20:59:56,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914771643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:56,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:56,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:59:56,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524856767] [2023-11-21 20:59:56,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:56,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:59:56,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:56,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:59:56,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:59:56,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 20:59:56,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 32 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-21 20:59:56,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:56,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 20:59:56,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 20:59:59,000 INFO L124 PetriNetUnfolderBase]: 26805/36560 cut-off events. [2023-11-21 20:59:59,000 INFO L125 PetriNetUnfolderBase]: For 13700/13700 co-relation queries the response was YES. [2023-11-21 20:59:59,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85865 conditions, 36560 events. 26805/36560 cut-off events. For 13700/13700 co-relation queries the response was YES. Maximal size of possible extension queue 1359. Compared 211782 event pairs, 13590 based on Foata normal form. 0/32405 useless extension candidates. Maximal degree in co-relation 40405. Up to 23499 conditions per place. [2023-11-21 20:59:59,379 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 47 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2023-11-21 20:59:59,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 56 transitions, 308 flow [2023-11-21 20:59:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:59:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 20:59:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2023-11-21 20:59:59,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2023-11-21 20:59:59,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 52 transitions. [2023-11-21 20:59:59,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 52 transitions. [2023-11-21 20:59:59,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 20:59:59,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 52 transitions. [2023-11-21 20:59:59,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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) [2023-11-21 20:59:59,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 20:59:59,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 20:59:59,386 INFO L175 Difference]: Start difference. First operand has 41 places, 32 transitions, 116 flow. Second operand 3 states and 52 transitions. [2023-11-21 20:59:59,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 56 transitions, 308 flow [2023-11-21 20:59:59,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 20:59:59,648 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 174 flow [2023-11-21 20:59:59,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-21 20:59:59,649 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-11-21 20:59:59,649 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 174 flow [2023-11-21 20:59:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2023-11-21 20:59:59,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 20:59:59,650 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:59:59,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 20:59:59,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 20:59:59,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:59:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1759286040, now seen corresponding path program 1 times [2023-11-21 20:59:59,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:59:59,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474028219] [2023-11-21 20:59:59,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:59:59,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:59:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:59:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 20:59:59,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:59:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474028219] [2023-11-21 20:59:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474028219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:59:59,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:59:59,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:59:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580170401] [2023-11-21 20:59:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:59:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:59:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:59:59,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:59:59,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:59:59,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 20:59:59,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 20:59:59,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 20:59:59,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 20:59:59,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:04,343 INFO L124 PetriNetUnfolderBase]: 45807/62726 cut-off events. [2023-11-21 21:00:04,344 INFO L125 PetriNetUnfolderBase]: For 36467/36467 co-relation queries the response was YES. [2023-11-21 21:00:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162306 conditions, 62726 events. 45807/62726 cut-off events. For 36467/36467 co-relation queries the response was YES. Maximal size of possible extension queue 2397. Compared 400056 event pairs, 5489 based on Foata normal form. 387/56039 useless extension candidates. Maximal degree in co-relation 162196. Up to 19591 conditions per place. [2023-11-21 21:00:04,738 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 104 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2023-11-21 21:00:04,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 128 transitions, 782 flow [2023-11-21 21:00:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:00:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:00:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2023-11-21 21:00:04,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6839080459770115 [2023-11-21 21:00:04,742 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 119 transitions. [2023-11-21 21:00:04,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 119 transitions. [2023-11-21 21:00:04,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:00:04,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 119 transitions. [2023-11-21 21:00:04,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 19.833333333333332) internal successors, (119), 6 states have internal predecessors, (119), 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) [2023-11-21 21:00:04,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-21 21:00:04,746 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 29.0) internal successors, (203), 7 states have internal predecessors, (203), 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) [2023-11-21 21:00:04,746 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 174 flow. Second operand 6 states and 119 transitions. [2023-11-21 21:00:04,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 128 transitions, 782 flow [2023-11-21 21:00:05,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 128 transitions, 738 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:00:05,112 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 357 flow [2023-11-21 21:00:05,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-11-21 21:00:05,114 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-11-21 21:00:05,114 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 357 flow [2023-11-21 21:00:05,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 21:00:05,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:05,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 21:00:05,115 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 21:00:05,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2106168600, now seen corresponding path program 2 times [2023-11-21 21:00:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859505305] [2023-11-21 21:00:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:05,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:00:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:05,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859505305] [2023-11-21 21:00:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859505305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:05,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521745445] [2023-11-21 21:00:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:05,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:05,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 21:00:05,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 21:00:05,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:00:05,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 21:00:05,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:10,541 INFO L124 PetriNetUnfolderBase]: 50175/69161 cut-off events. [2023-11-21 21:00:10,541 INFO L125 PetriNetUnfolderBase]: For 76614/76614 co-relation queries the response was YES. [2023-11-21 21:00:10,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199465 conditions, 69161 events. 50175/69161 cut-off events. For 76614/76614 co-relation queries the response was YES. Maximal size of possible extension queue 2681. Compared 454995 event pairs, 4211 based on Foata normal form. 774/63695 useless extension candidates. Maximal degree in co-relation 105395. Up to 21769 conditions per place. [2023-11-21 21:00:11,183 INFO L140 encePairwiseOnDemand]: 19/29 looper letters, 118 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2023-11-21 21:00:11,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 155 transitions, 1091 flow [2023-11-21 21:00:11,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:00:11,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 21:00:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2023-11-21 21:00:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6600985221674877 [2023-11-21 21:00:11,185 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 134 transitions. [2023-11-21 21:00:11,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 134 transitions. [2023-11-21 21:00:11,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:00:11,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 134 transitions. [2023-11-21 21:00:11,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 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) [2023-11-21 21:00:11,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-21 21:00:11,187 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 29.0) internal successors, (232), 8 states have internal predecessors, (232), 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) [2023-11-21 21:00:11,188 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 357 flow. Second operand 7 states and 134 transitions. [2023-11-21 21:00:11,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 155 transitions, 1091 flow [2023-11-21 21:00:12,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 155 transitions, 1091 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:00:12,103 INFO L231 Difference]: Finished difference. Result has 60 places, 74 transitions, 673 flow [2023-11-21 21:00:12,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=60, PETRI_TRANSITIONS=74} [2023-11-21 21:00:12,104 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 22 predicate places. [2023-11-21 21:00:12,105 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 74 transitions, 673 flow [2023-11-21 21:00:12,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2023-11-21 21:00:12,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:12,105 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 21:00:12,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 21:00:12,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash 366510730, now seen corresponding path program 1 times [2023-11-21 21:00:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822032704] [2023-11-21 21:00:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 21:00:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:12,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822032704] [2023-11-21 21:00:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822032704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:12,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:12,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:00:12,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223940545] [2023-11-21 21:00:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:00:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:00:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:00:12,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 21:00:12,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 74 transitions, 673 flow. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-21 21:00:12,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:00:12,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 21:00:12,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:20,309 INFO L124 PetriNetUnfolderBase]: 66353/92388 cut-off events. [2023-11-21 21:00:20,309 INFO L125 PetriNetUnfolderBase]: For 249900/249900 co-relation queries the response was YES. [2023-11-21 21:00:20,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295878 conditions, 92388 events. 66353/92388 cut-off events. For 249900/249900 co-relation queries the response was YES. Maximal size of possible extension queue 3745. Compared 633410 event pairs, 31130 based on Foata normal form. 0/85452 useless extension candidates. Maximal degree in co-relation 141924. Up to 57518 conditions per place. [2023-11-21 21:00:20,882 INFO L140 encePairwiseOnDemand]: 23/29 looper letters, 94 selfloop transitions, 34 changer transitions 0/129 dead transitions. [2023-11-21 21:00:20,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 129 transitions, 1423 flow [2023-11-21 21:00:20,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:00:20,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:00:20,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2023-11-21 21:00:20,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5862068965517241 [2023-11-21 21:00:20,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 51 transitions. [2023-11-21 21:00:20,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 51 transitions. [2023-11-21 21:00:20,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:00:20,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 51 transitions. [2023-11-21 21:00:20,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2023-11-21 21:00:20,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:00:20,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 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) [2023-11-21 21:00:20,885 INFO L175 Difference]: Start difference. First operand has 60 places, 74 transitions, 673 flow. Second operand 3 states and 51 transitions. [2023-11-21 21:00:20,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 129 transitions, 1423 flow [2023-11-21 21:00:24,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 129 transitions, 1358 flow, removed 17 selfloop flow, removed 1 redundant places. [2023-11-21 21:00:24,248 INFO L231 Difference]: Finished difference. Result has 63 places, 96 transitions, 1060 flow [2023-11-21 21:00:24,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1060, PETRI_PLACES=63, PETRI_TRANSITIONS=96} [2023-11-21 21:00:24,249 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-11-21 21:00:24,249 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 96 transitions, 1060 flow [2023-11-21 21:00:24,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-21 21:00:24,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:00:24,250 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:00:24,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 21:00:24,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-21 21:00:24,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:00:24,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1101083437, now seen corresponding path program 1 times [2023-11-21 21:00:24,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:00:24,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398556679] [2023-11-21 21:00:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:00:24,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:00:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:00:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 21:00:24,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:00:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398556679] [2023-11-21 21:00:24,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398556679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:00:24,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:00:24,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 21:00:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400933812] [2023-11-21 21:00:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:00:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:00:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:00:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:00:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:00:24,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 29 [2023-11-21 21:00:24,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 96 transitions, 1060 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2023-11-21 21:00:24,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:00:24,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 29 [2023-11-21 21:00:24,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:00:39,008 INFO L124 PetriNetUnfolderBase]: 115193/160897 cut-off events. [2023-11-21 21:00:39,008 INFO L125 PetriNetUnfolderBase]: For 502146/502146 co-relation queries the response was YES. [2023-11-21 21:00:39,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553817 conditions, 160897 events. 115193/160897 cut-off events. For 502146/502146 co-relation queries the response was YES. Maximal size of possible extension queue 6833. Compared 1199372 event pairs, 17777 based on Foata normal form. 1938/155200 useless extension candidates. Maximal degree in co-relation 553685. Up to 50976 conditions per place.