./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme --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 2aa715856437bb3403b6a2717a4123b124cdc9b291b63ee677b7c1993b3be7b6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:42:43,750 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:42:43,883 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:42:43,887 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:42:43,888 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:42:43,952 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:42:43,953 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:42:43,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:42:43,956 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:42:43,961 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:42:43,961 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:42:43,962 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:42:43,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:42:43,964 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:42:43,965 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:42:43,965 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:42:43,966 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:42:43,966 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:42:43,967 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:42:43,967 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:42:43,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:42:43,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:42:43,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:42:43,969 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:42:43,970 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:42:43,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:42:43,971 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:42:43,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:42:43,972 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:42:43,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:42:43,974 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:42:43,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:43,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:42:43,975 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:42:43,975 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:42:43,975 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:42:43,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:42:43,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:42:43,976 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:42:43,976 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:42:43,977 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:42:43,977 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:42:43,977 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_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2aa715856437bb3403b6a2717a4123b124cdc9b291b63ee677b7c1993b3be7b6 [2023-11-26 10:42:44,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:42:44,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:42:44,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:42:44,353 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:42:44,353 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:42:44,355 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2023-11-26 10:42:47,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:42:47,665 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:42:47,667 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c [2023-11-26 10:42:47,679 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/data/fdded3b20/96f3cbfe023c4859b56f4f72f5196cf7/FLAGba2bdd5e1 [2023-11-26 10:42:47,696 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/data/fdded3b20/96f3cbfe023c4859b56f4f72f5196cf7 [2023-11-26 10:42:47,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:42:47,706 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:42:47,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:47,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:42:47,718 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:42:47,721 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:47" (1/1) ... [2023-11-26 10:42:47,722 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794930ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:47, skipping insertion in model container [2023-11-26 10:42:47,722 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:42:47" (1/1) ... [2023-11-26 10:42:47,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:42:48,000 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_f3c2a9bb-3e58-479e-947d-9699538a7c0e/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2630,2643] [2023-11-26 10:42:48,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:48,017 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:42:48,043 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_f3c2a9bb-3e58-479e-947d-9699538a7c0e/sv-benchmarks/c/weaver/popl20-mult-equiv.wvr.c[2630,2643] [2023-11-26 10:42:48,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:42:48,054 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:48,055 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-26 10:42:48,063 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:42:48,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48 WrapperNode [2023-11-26 10:42:48,064 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:42:48,066 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:48,066 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:42:48,066 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:42:48,075 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,083 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,105 INFO L138 Inliner]: procedures = 22, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-26 10:42:48,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:42:48,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:42:48,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:42:48,107 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:42:48,118 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,121 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,137 INFO L175 MemorySlicer]: Split 8 memory accesses to 4 slices as follows [2, 2, 2, 2]. 25 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2023-11-26 10:42:48,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,138 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,146 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,151 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,154 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,158 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:42:48,159 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:42:48,159 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:42:48,159 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:42:48,160 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (1/1) ... [2023-11-26 10:42:48,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:42:48,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:42:48,197 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:42:48,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:42:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:42:48,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-26 10:42:48,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-26 10:42:48,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-26 10:42:48,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-26 10:42:48,237 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-26 10:42:48,237 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:42:48,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:42:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 10:42:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 10:42:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-11-26 10:42:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-26 10:42:48,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:42:48,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-11-26 10:42:48,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:42:48,242 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-26 10:42:48,367 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:42:48,370 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:42:48,698 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:42:48,910 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:42:48,910 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-26 10:42:48,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:48 BoogieIcfgContainer [2023-11-26 10:42:48,911 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:42:48,914 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:42:48,914 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:42:48,917 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:42:48,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:42:47" (1/3) ... [2023-11-26 10:42:48,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bad7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:48, skipping insertion in model container [2023-11-26 10:42:48,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:42:48" (2/3) ... [2023-11-26 10:42:48,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bad7bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:42:48, skipping insertion in model container [2023-11-26 10:42:48,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:42:48" (3/3) ... [2023-11-26 10:42:48,921 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-equiv.wvr.c [2023-11-26 10:42:48,930 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-26 10:42:48,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:42:48,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:42:48,942 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-26 10:42:49,009 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-26 10:42:49,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 34 transitions, 89 flow [2023-11-26 10:42:49,116 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-11-26 10:42:49,123 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:42:49,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 31 events. 3/31 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 44 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2023-11-26 10:42:49,130 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 34 transitions, 89 flow [2023-11-26 10:42:49,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 30 transitions, 78 flow [2023-11-26 10:42:49,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:42:49,167 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;@1edea0be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:42:49,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-26 10:42:49,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-26 10:42:49,201 INFO L124 PetriNetUnfolderBase]: 3/29 cut-off events. [2023-11-26 10:42:49,201 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-26 10:42:49,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:49,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:49,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:49,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1123511721, now seen corresponding path program 1 times [2023-11-26 10:42:49,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:49,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366728979] [2023-11-26 10:42:49,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:49,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:50,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366728979] [2023-11-26 10:42:50,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366728979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:42:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472137179] [2023-11-26 10:42:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:42:50,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:42:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:42:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2023-11-26 10:42:50,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-26 10:42:50,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:50,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2023-11-26 10:42:50,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:50,397 INFO L124 PetriNetUnfolderBase]: 359/616 cut-off events. [2023-11-26 10:42:50,397 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-26 10:42:50,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 616 events. 359/616 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2801 event pairs, 39 based on Foata normal form. 1/602 useless extension candidates. Maximal degree in co-relation 896. Up to 421 conditions per place. [2023-11-26 10:42:50,409 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 30 selfloop transitions, 4 changer transitions 1/46 dead transitions. [2023-11-26 10:42:50,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 46 transitions, 195 flow [2023-11-26 10:42:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:42:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-26 10:42:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-26 10:42:50,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7647058823529411 [2023-11-26 10:42:50,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-26 10:42:50,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-26 10:42:50,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:50,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-26 10:42:50,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-26 10:42:50,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-11-26 10:42:50,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2023-11-26 10:42:50,443 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 78 flow. Second operand 3 states and 78 transitions. [2023-11-26 10:42:50,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 46 transitions, 195 flow [2023-11-26 10:42:50,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-26 10:42:50,453 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 92 flow [2023-11-26 10:42:50,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-11-26 10:42:50,459 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -3 predicate places. [2023-11-26 10:42:50,460 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 92 flow [2023-11-26 10:42:50,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2023-11-26 10:42:50,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:50,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:50,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:42:50,461 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:50,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash 851932553, now seen corresponding path program 1 times [2023-11-26 10:42:50,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:50,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636817200] [2023-11-26 10:42:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:50,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:50,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636817200] [2023-11-26 10:42:50,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636817200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:50,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:50,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397464909] [2023-11-26 10:42:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:50,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:51,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 10:42:51,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 92 flow. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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) [2023-11-26 10:42:51,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:51,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 10:42:51,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:51,509 INFO L124 PetriNetUnfolderBase]: 598/944 cut-off events. [2023-11-26 10:42:51,509 INFO L125 PetriNetUnfolderBase]: For 203/222 co-relation queries the response was YES. [2023-11-26 10:42:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2153 conditions, 944 events. 598/944 cut-off events. For 203/222 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4456 event pairs, 37 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 464. Up to 478 conditions per place. [2023-11-26 10:42:51,524 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 64 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2023-11-26 10:42:51,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 90 transitions, 412 flow [2023-11-26 10:42:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:42:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:42:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2023-11-26 10:42:51,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6213235294117647 [2023-11-26 10:42:51,536 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 169 transitions. [2023-11-26 10:42:51,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 169 transitions. [2023-11-26 10:42:51,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:51,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 169 transitions. [2023-11-26 10:42:51,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 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) [2023-11-26 10:42:51,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2023-11-26 10:42:51,545 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2023-11-26 10:42:51,545 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 92 flow. Second operand 8 states and 169 transitions. [2023-11-26 10:42:51,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 90 transitions, 412 flow [2023-11-26 10:42:51,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 90 transitions, 401 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:51,557 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 209 flow [2023-11-26 10:42:51,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=209, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-26 10:42:51,558 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 8 predicate places. [2023-11-26 10:42:51,559 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 209 flow [2023-11-26 10:42:51,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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) [2023-11-26 10:42:51,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:51,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:51,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:42:51,561 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:51,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:51,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1593507527, now seen corresponding path program 2 times [2023-11-26 10:42:51,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230362320] [2023-11-26 10:42:51,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:51,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:51,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:51,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230362320] [2023-11-26 10:42:51,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230362320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:51,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:51,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:42:51,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265937706] [2023-11-26 10:42:51,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:51,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:51,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:51,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 10:42:51,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 209 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-26 10:42:51,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:51,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 10:42:51,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:52,178 INFO L124 PetriNetUnfolderBase]: 710/1118 cut-off events. [2023-11-26 10:42:52,179 INFO L125 PetriNetUnfolderBase]: For 789/816 co-relation queries the response was YES. [2023-11-26 10:42:52,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 1118 events. 710/1118 cut-off events. For 789/816 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5387 event pairs, 95 based on Foata normal form. 25/1114 useless extension candidates. Maximal degree in co-relation 2902. Up to 734 conditions per place. [2023-11-26 10:42:52,192 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 54 selfloop transitions, 21 changer transitions 3/86 dead transitions. [2023-11-26 10:42:52,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 86 transitions, 506 flow [2023-11-26 10:42:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:42:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2023-11-26 10:42:52,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-26 10:42:52,197 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 131 transitions. [2023-11-26 10:42:52,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 131 transitions. [2023-11-26 10:42:52,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:52,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 131 transitions. [2023-11-26 10:42:52,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2023-11-26 10:42:52,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:42:52,203 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:42:52,204 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 209 flow. Second operand 6 states and 131 transitions. [2023-11-26 10:42:52,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 86 transitions, 506 flow [2023-11-26 10:42:52,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 86 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:52,213 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 347 flow [2023-11-26 10:42:52,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-11-26 10:42:52,215 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 17 predicate places. [2023-11-26 10:42:52,216 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 347 flow [2023-11-26 10:42:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-26 10:42:52,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:52,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:52,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:42:52,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:52,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1227087889, now seen corresponding path program 3 times [2023-11-26 10:42:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203431343] [2023-11-26 10:42:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:52,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:52,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203431343] [2023-11-26 10:42:52,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203431343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:52,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:52,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:52,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044504481] [2023-11-26 10:42:52,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:52,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:52,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:52,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-26 10:42:52,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 347 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2023-11-26 10:42:52,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:52,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-26 10:42:52,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:53,234 INFO L124 PetriNetUnfolderBase]: 1418/2106 cut-off events. [2023-11-26 10:42:53,234 INFO L125 PetriNetUnfolderBase]: For 1909/1930 co-relation queries the response was YES. [2023-11-26 10:42:53,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6224 conditions, 2106 events. 1418/2106 cut-off events. For 1909/1930 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 10700 event pairs, 221 based on Foata normal form. 33/2104 useless extension candidates. Maximal degree in co-relation 4908. Up to 995 conditions per place. [2023-11-26 10:42:53,260 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 91 selfloop transitions, 31 changer transitions 3/132 dead transitions. [2023-11-26 10:42:53,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 132 transitions, 857 flow [2023-11-26 10:42:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:42:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:42:53,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2023-11-26 10:42:53,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7226890756302521 [2023-11-26 10:42:53,264 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 172 transitions. [2023-11-26 10:42:53,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 172 transitions. [2023-11-26 10:42:53,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:53,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 172 transitions. [2023-11-26 10:42:53,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 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) [2023-11-26 10:42:53,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2023-11-26 10:42:53,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2023-11-26 10:42:53,268 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 347 flow. Second operand 7 states and 172 transitions. [2023-11-26 10:42:53,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 132 transitions, 857 flow [2023-11-26 10:42:53,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 132 transitions, 811 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-26 10:42:53,284 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 498 flow [2023-11-26 10:42:53,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=498, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2023-11-26 10:42:53,286 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 25 predicate places. [2023-11-26 10:42:53,287 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 498 flow [2023-11-26 10:42:53,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2023-11-26 10:42:53,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:53,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:53,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:42:53,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:53,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1297419695, now seen corresponding path program 4 times [2023-11-26 10:42:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:53,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525743549] [2023-11-26 10:42:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:53,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:53,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:53,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525743549] [2023-11-26 10:42:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525743549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:53,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:53,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:53,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951944472] [2023-11-26 10:42:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:53,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:53,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:53,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:53,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 10:42:53,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 498 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-26 10:42:53,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:53,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 10:42:53,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:54,116 INFO L124 PetriNetUnfolderBase]: 1332/2050 cut-off events. [2023-11-26 10:42:54,117 INFO L125 PetriNetUnfolderBase]: For 4173/4229 co-relation queries the response was YES. [2023-11-26 10:42:54,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7147 conditions, 2050 events. 1332/2050 cut-off events. For 4173/4229 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10846 event pairs, 227 based on Foata normal form. 30/2052 useless extension candidates. Maximal degree in co-relation 5784. Up to 1207 conditions per place. [2023-11-26 10:42:54,144 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 62 selfloop transitions, 35 changer transitions 3/109 dead transitions. [2023-11-26 10:42:54,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 109 transitions, 861 flow [2023-11-26 10:42:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:42:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-26 10:42:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2023-11-26 10:42:54,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992647058823529 [2023-11-26 10:42:54,146 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 163 transitions. [2023-11-26 10:42:54,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 163 transitions. [2023-11-26 10:42:54,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:54,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 163 transitions. [2023-11-26 10:42:54,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 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) [2023-11-26 10:42:54,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2023-11-26 10:42:54,148 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 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) [2023-11-26 10:42:54,148 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 498 flow. Second operand 8 states and 163 transitions. [2023-11-26 10:42:54,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 109 transitions, 861 flow [2023-11-26 10:42:54,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 851 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:54,162 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 642 flow [2023-11-26 10:42:54,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=642, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-11-26 10:42:54,164 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 34 predicate places. [2023-11-26 10:42:54,165 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 642 flow [2023-11-26 10:42:54,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2023-11-26 10:42:54,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:54,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:54,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:42:54,166 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:54,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1625499077, now seen corresponding path program 1 times [2023-11-26 10:42:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:54,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146950920] [2023-11-26 10:42:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146950920] [2023-11-26 10:42:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146950920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:54,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013948476] [2023-11-26 10:42:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:54,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:54,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 10:42:54,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 642 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:42:54,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:54,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 10:42:54,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:55,242 INFO L124 PetriNetUnfolderBase]: 2224/3463 cut-off events. [2023-11-26 10:42:55,242 INFO L125 PetriNetUnfolderBase]: For 9406/9561 co-relation queries the response was YES. [2023-11-26 10:42:55,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12883 conditions, 3463 events. 2224/3463 cut-off events. For 9406/9561 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 19565 event pairs, 728 based on Foata normal form. 6/3217 useless extension candidates. Maximal degree in co-relation 11430. Up to 1938 conditions per place. [2023-11-26 10:42:55,300 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 75 selfloop transitions, 36 changer transitions 0/121 dead transitions. [2023-11-26 10:42:55,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 1025 flow [2023-11-26 10:42:55,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:42:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:42:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2023-11-26 10:42:55,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6705882352941176 [2023-11-26 10:42:55,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 114 transitions. [2023-11-26 10:42:55,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 114 transitions. [2023-11-26 10:42:55,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:55,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 114 transitions. [2023-11-26 10:42:55,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2023-11-26 10:42:55,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:42:55,304 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:42:55,304 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 642 flow. Second operand 5 states and 114 transitions. [2023-11-26 10:42:55,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 1025 flow [2023-11-26 10:42:55,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 121 transitions, 975 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-26 10:42:55,357 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 755 flow [2023-11-26 10:42:55,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=755, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2023-11-26 10:42:55,360 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 37 predicate places. [2023-11-26 10:42:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 755 flow [2023-11-26 10:42:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:42:55,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:55,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:55,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:42:55,361 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:55,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1709205711, now seen corresponding path program 2 times [2023-11-26 10:42:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:55,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500343109] [2023-11-26 10:42:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:55,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:55,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500343109] [2023-11-26 10:42:55,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500343109] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:55,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:55,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:55,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010104114] [2023-11-26 10:42:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:55,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:55,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:55,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 10:42:55,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 755 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:42:55,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:55,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 10:42:55,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:56,510 INFO L124 PetriNetUnfolderBase]: 2919/4438 cut-off events. [2023-11-26 10:42:56,511 INFO L125 PetriNetUnfolderBase]: For 20600/20851 co-relation queries the response was YES. [2023-11-26 10:42:56,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19163 conditions, 4438 events. 2919/4438 cut-off events. For 20600/20851 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 25959 event pairs, 414 based on Foata normal form. 49/4449 useless extension candidates. Maximal degree in co-relation 18287. Up to 1922 conditions per place. [2023-11-26 10:42:56,578 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 124 selfloop transitions, 74 changer transitions 2/210 dead transitions. [2023-11-26 10:42:56,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 210 transitions, 2489 flow [2023-11-26 10:42:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:42:56,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:42:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2023-11-26 10:42:56,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2023-11-26 10:42:56,580 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 124 transitions. [2023-11-26 10:42:56,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 124 transitions. [2023-11-26 10:42:56,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:56,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 124 transitions. [2023-11-26 10:42:56,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2023-11-26 10:42:56,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:42:56,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:42:56,583 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 755 flow. Second operand 6 states and 124 transitions. [2023-11-26 10:42:56,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 210 transitions, 2489 flow [2023-11-26 10:42:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 210 transitions, 2349 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-26 10:42:56,648 INFO L231 Difference]: Finished difference. Result has 82 places, 136 transitions, 1687 flow [2023-11-26 10:42:56,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1687, PETRI_PLACES=82, PETRI_TRANSITIONS=136} [2023-11-26 10:42:56,649 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 45 predicate places. [2023-11-26 10:42:56,649 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 136 transitions, 1687 flow [2023-11-26 10:42:56,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:42:56,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:56,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:56,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-26 10:42:56,650 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:56,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1060668215, now seen corresponding path program 1 times [2023-11-26 10:42:56,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:56,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579180101] [2023-11-26 10:42:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:56,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:56,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:56,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579180101] [2023-11-26 10:42:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579180101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:56,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:56,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573418782] [2023-11-26 10:42:56,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:56,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 10:42:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 10:42:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:42:57,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-26 10:42:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 136 transitions, 1687 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2023-11-26 10:42:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-26 10:42:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:42:58,213 INFO L124 PetriNetUnfolderBase]: 3533/5323 cut-off events. [2023-11-26 10:42:58,213 INFO L125 PetriNetUnfolderBase]: For 29722/30383 co-relation queries the response was YES. [2023-11-26 10:42:58,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25958 conditions, 5323 events. 3533/5323 cut-off events. For 29722/30383 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 30878 event pairs, 483 based on Foata normal form. 301/5501 useless extension candidates. Maximal degree in co-relation 22177. Up to 2654 conditions per place. [2023-11-26 10:42:58,383 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 162 selfloop transitions, 52 changer transitions 3/227 dead transitions. [2023-11-26 10:42:58,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 227 transitions, 2939 flow [2023-11-26 10:42:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:42:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-26 10:42:58,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2023-11-26 10:42:58,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2023-11-26 10:42:58,386 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 154 transitions. [2023-11-26 10:42:58,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 154 transitions. [2023-11-26 10:42:58,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:42:58,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 154 transitions. [2023-11-26 10:42:58,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 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) [2023-11-26 10:42:58,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2023-11-26 10:42:58,390 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 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) [2023-11-26 10:42:58,391 INFO L175 Difference]: Start difference. First operand has 82 places, 136 transitions, 1687 flow. Second operand 7 states and 154 transitions. [2023-11-26 10:42:58,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 227 transitions, 2939 flow [2023-11-26 10:42:58,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 227 transitions, 2909 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-11-26 10:42:58,507 INFO L231 Difference]: Finished difference. Result has 93 places, 139 transitions, 1908 flow [2023-11-26 10:42:58,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1908, PETRI_PLACES=93, PETRI_TRANSITIONS=139} [2023-11-26 10:42:58,509 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 56 predicate places. [2023-11-26 10:42:58,509 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 139 transitions, 1908 flow [2023-11-26 10:42:58,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2023-11-26 10:42:58,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:42:58,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:42:58,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-26 10:42:58,510 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:42:58,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:42:58,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1637369743, now seen corresponding path program 3 times [2023-11-26 10:42:58,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:42:58,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726448568] [2023-11-26 10:42:58,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:42:58,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:42:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:42:58,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:42:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:42:58,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726448568] [2023-11-26 10:42:58,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726448568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:42:58,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:42:58,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:42:58,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741117213] [2023-11-26 10:42:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:42:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:42:58,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:42:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:42:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:42:58,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 10:42:58,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 139 transitions, 1908 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:42:58,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:42:58,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 10:42:58,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:00,419 INFO L124 PetriNetUnfolderBase]: 4280/6827 cut-off events. [2023-11-26 10:43:00,419 INFO L125 PetriNetUnfolderBase]: For 42679/43339 co-relation queries the response was YES. [2023-11-26 10:43:00,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34432 conditions, 6827 events. 4280/6827 cut-off events. For 42679/43339 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 44674 event pairs, 1090 based on Foata normal form. 65/6821 useless extension candidates. Maximal degree in co-relation 28948. Up to 3311 conditions per place. [2023-11-26 10:43:00,504 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 98 selfloop transitions, 133 changer transitions 3/247 dead transitions. [2023-11-26 10:43:00,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 247 transitions, 3585 flow [2023-11-26 10:43:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2023-11-26 10:43:00,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519607843137255 [2023-11-26 10:43:00,506 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 133 transitions. [2023-11-26 10:43:00,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 133 transitions. [2023-11-26 10:43:00,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:00,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 133 transitions. [2023-11-26 10:43:00,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 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) [2023-11-26 10:43:00,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:43:00,509 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:43:00,509 INFO L175 Difference]: Start difference. First operand has 93 places, 139 transitions, 1908 flow. Second operand 6 states and 133 transitions. [2023-11-26 10:43:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 247 transitions, 3585 flow [2023-11-26 10:43:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 247 transitions, 3575 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-26 10:43:00,649 INFO L231 Difference]: Finished difference. Result has 101 places, 190 transitions, 3176 flow [2023-11-26 10:43:00,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3176, PETRI_PLACES=101, PETRI_TRANSITIONS=190} [2023-11-26 10:43:00,651 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2023-11-26 10:43:00,651 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 190 transitions, 3176 flow [2023-11-26 10:43:00,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:43:00,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:00,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:00,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-26 10:43:00,653 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:00,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1722166531, now seen corresponding path program 4 times [2023-11-26 10:43:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119834539] [2023-11-26 10:43:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:01,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:01,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119834539] [2023-11-26 10:43:01,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119834539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:01,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:01,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:43:01,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091823181] [2023-11-26 10:43:01,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:01,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:01,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2023-11-26 10:43:01,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 190 transitions, 3176 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:43:01,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:01,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2023-11-26 10:43:01,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:02,903 INFO L124 PetriNetUnfolderBase]: 4285/6893 cut-off events. [2023-11-26 10:43:02,904 INFO L125 PetriNetUnfolderBase]: For 56656/57378 co-relation queries the response was YES. [2023-11-26 10:43:02,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38291 conditions, 6893 events. 4285/6893 cut-off events. For 56656/57378 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 46286 event pairs, 749 based on Foata normal form. 70/6892 useless extension candidates. Maximal degree in co-relation 32097. Up to 2910 conditions per place. [2023-11-26 10:43:02,985 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 114 selfloop transitions, 123 changer transitions 4/254 dead transitions. [2023-11-26 10:43:02,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 254 transitions, 4264 flow [2023-11-26 10:43:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:43:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2023-11-26 10:43:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588235294117647 [2023-11-26 10:43:02,987 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 112 transitions. [2023-11-26 10:43:02,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 112 transitions. [2023-11-26 10:43:02,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:02,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 112 transitions. [2023-11-26 10:43:02,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 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) [2023-11-26 10:43:02,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:43:02,990 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:43:02,990 INFO L175 Difference]: Start difference. First operand has 101 places, 190 transitions, 3176 flow. Second operand 5 states and 112 transitions. [2023-11-26 10:43:02,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 254 transitions, 4264 flow [2023-11-26 10:43:03,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 254 transitions, 4224 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:03,133 INFO L231 Difference]: Finished difference. Result has 108 places, 204 transitions, 3887 flow [2023-11-26 10:43:03,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3887, PETRI_PLACES=108, PETRI_TRANSITIONS=204} [2023-11-26 10:43:03,135 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 71 predicate places. [2023-11-26 10:43:03,135 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 204 transitions, 3887 flow [2023-11-26 10:43:03,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2023-11-26 10:43:03,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:03,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:03,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 10:43:03,137 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:03,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1169430289, now seen corresponding path program 2 times [2023-11-26 10:43:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:03,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537178158] [2023-11-26 10:43:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:03,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:03,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:03,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537178158] [2023-11-26 10:43:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537178158] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:03,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:03,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 10:43:03,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001164450] [2023-11-26 10:43:03,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:03,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:03,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2023-11-26 10:43:03,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 204 transitions, 3887 flow. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2023-11-26 10:43:03,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:03,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2023-11-26 10:43:03,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:05,071 INFO L124 PetriNetUnfolderBase]: 4080/6570 cut-off events. [2023-11-26 10:43:05,071 INFO L125 PetriNetUnfolderBase]: For 78797/80266 co-relation queries the response was YES. [2023-11-26 10:43:05,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40441 conditions, 6570 events. 4080/6570 cut-off events. For 78797/80266 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 43341 event pairs, 847 based on Foata normal form. 206/6592 useless extension candidates. Maximal degree in co-relation 31195. Up to 5459 conditions per place. [2023-11-26 10:43:05,138 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 144 selfloop transitions, 71 changer transitions 1/236 dead transitions. [2023-11-26 10:43:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 236 transitions, 4542 flow [2023-11-26 10:43:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:43:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-26 10:43:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2023-11-26 10:43:05,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6647058823529411 [2023-11-26 10:43:05,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 113 transitions. [2023-11-26 10:43:05,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 113 transitions. [2023-11-26 10:43:05,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:05,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 113 transitions. [2023-11-26 10:43:05,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 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) [2023-11-26 10:43:05,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:43:05,142 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 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) [2023-11-26 10:43:05,143 INFO L175 Difference]: Start difference. First operand has 108 places, 204 transitions, 3887 flow. Second operand 5 states and 113 transitions. [2023-11-26 10:43:05,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 236 transitions, 4542 flow [2023-11-26 10:43:05,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 236 transitions, 4532 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-11-26 10:43:05,354 INFO L231 Difference]: Finished difference. Result has 114 places, 209 transitions, 4222 flow [2023-11-26 10:43:05,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4222, PETRI_PLACES=114, PETRI_TRANSITIONS=209} [2023-11-26 10:43:05,356 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 77 predicate places. [2023-11-26 10:43:05,356 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 209 transitions, 4222 flow [2023-11-26 10:43:05,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2023-11-26 10:43:05,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:05,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:05,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-26 10:43:05,358 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:05,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1723514221, now seen corresponding path program 5 times [2023-11-26 10:43:05,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:05,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567099429] [2023-11-26 10:43:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:05,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567099429] [2023-11-26 10:43:05,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567099429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:43:05,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:43:05,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:43:05,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867908003] [2023-11-26 10:43:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:43:05,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:43:05,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:43:05,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:43:05,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2023-11-26 10:43:05,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 209 transitions, 4222 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2023-11-26 10:43:05,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:05,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2023-11-26 10:43:05,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:07,429 INFO L124 PetriNetUnfolderBase]: 5198/8011 cut-off events. [2023-11-26 10:43:07,429 INFO L125 PetriNetUnfolderBase]: For 83927/84565 co-relation queries the response was YES. [2023-11-26 10:43:07,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48082 conditions, 8011 events. 5198/8011 cut-off events. For 83927/84565 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 50085 event pairs, 1271 based on Foata normal form. 40/8003 useless extension candidates. Maximal degree in co-relation 41053. Up to 4215 conditions per place. [2023-11-26 10:43:07,524 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 107 selfloop transitions, 163 changer transitions 4/284 dead transitions. [2023-11-26 10:43:07,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 284 transitions, 5434 flow [2023-11-26 10:43:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 10:43:07,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-26 10:43:07,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2023-11-26 10:43:07,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2023-11-26 10:43:07,527 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 132 transitions. [2023-11-26 10:43:07,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 132 transitions. [2023-11-26 10:43:07,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:07,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 132 transitions. [2023-11-26 10:43:07,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 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) [2023-11-26 10:43:07,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:43:07,529 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 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) [2023-11-26 10:43:07,529 INFO L175 Difference]: Start difference. First operand has 114 places, 209 transitions, 4222 flow. Second operand 6 states and 132 transitions. [2023-11-26 10:43:07,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 284 transitions, 5434 flow [2023-11-26 10:43:07,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 284 transitions, 5355 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-26 10:43:07,799 INFO L231 Difference]: Finished difference. Result has 120 places, 224 transitions, 4843 flow [2023-11-26 10:43:07,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4843, PETRI_PLACES=120, PETRI_TRANSITIONS=224} [2023-11-26 10:43:07,802 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 83 predicate places. [2023-11-26 10:43:07,802 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 224 transitions, 4843 flow [2023-11-26 10:43:07,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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) [2023-11-26 10:43:07,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:07,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:07,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-26 10:43:07,803 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:07,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:07,804 INFO L85 PathProgramCache]: Analyzing trace with hash 326785423, now seen corresponding path program 6 times [2023-11-26 10:43:07,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:07,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421759346] [2023-11-26 10:43:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:07,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:08,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421759346] [2023-11-26 10:43:08,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421759346] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:08,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689019938] [2023-11-26 10:43:08,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:43:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:08,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:08,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:43:08,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-26 10:43:08,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:08,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-26 10:43:08,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:08,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:09,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689019938] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:09,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:09,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 12 [2023-11-26 10:43:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587733404] [2023-11-26 10:43:09,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:09,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:09,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2023-11-26 10:43:09,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 224 transitions, 4843 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 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) [2023-11-26 10:43:09,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:09,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2023-11-26 10:43:09,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:13,694 INFO L124 PetriNetUnfolderBase]: 9585/14114 cut-off events. [2023-11-26 10:43:13,695 INFO L125 PetriNetUnfolderBase]: For 171655/171655 co-relation queries the response was YES. [2023-11-26 10:43:13,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89088 conditions, 14114 events. 9585/14114 cut-off events. For 171655/171655 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 85513 event pairs, 429 based on Foata normal form. 230/14339 useless extension candidates. Maximal degree in co-relation 78257. Up to 3248 conditions per place. [2023-11-26 10:43:13,847 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 269 selfloop transitions, 350 changer transitions 87/710 dead transitions. [2023-11-26 10:43:13,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 710 transitions, 11928 flow [2023-11-26 10:43:13,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 10:43:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-26 10:43:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 576 transitions. [2023-11-26 10:43:14,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5841784989858012 [2023-11-26 10:43:14,028 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 576 transitions. [2023-11-26 10:43:14,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 576 transitions. [2023-11-26 10:43:14,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:14,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 576 transitions. [2023-11-26 10:43:14,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 19.862068965517242) internal successors, (576), 29 states have internal predecessors, (576), 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) [2023-11-26 10:43:14,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 34.0) internal successors, (1020), 30 states have internal predecessors, (1020), 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) [2023-11-26 10:43:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 34.0) internal successors, (1020), 30 states have internal predecessors, (1020), 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) [2023-11-26 10:43:14,035 INFO L175 Difference]: Start difference. First operand has 120 places, 224 transitions, 4843 flow. Second operand 29 states and 576 transitions. [2023-11-26 10:43:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 710 transitions, 11928 flow [2023-11-26 10:43:14,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 710 transitions, 11634 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-26 10:43:14,496 INFO L231 Difference]: Finished difference. Result has 169 places, 408 transitions, 9215 flow [2023-11-26 10:43:14,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4313, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9215, PETRI_PLACES=169, PETRI_TRANSITIONS=408} [2023-11-26 10:43:14,497 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 132 predicate places. [2023-11-26 10:43:14,497 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 408 transitions, 9215 flow [2023-11-26 10:43:14,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 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) [2023-11-26 10:43:14,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:14,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:14,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:43:14,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 10:43:14,699 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:14,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash 765396677, now seen corresponding path program 1 times [2023-11-26 10:43:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570282645] [2023-11-26 10:43:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:15,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570282645] [2023-11-26 10:43:15,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570282645] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:15,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706170900] [2023-11-26 10:43:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:15,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:15,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:15,060 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:15,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:43:15,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:15,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-26 10:43:15,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706170900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:15,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:15,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-26 10:43:15,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91509623] [2023-11-26 10:43:15,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:15,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-26 10:43:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-26 10:43:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-26 10:43:16,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2023-11-26 10:43:16,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 408 transitions, 9215 flow. Second operand has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2023-11-26 10:43:16,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:16,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2023-11-26 10:43:16,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-26 10:43:20,683 INFO L124 PetriNetUnfolderBase]: 8686/14480 cut-off events. [2023-11-26 10:43:20,683 INFO L125 PetriNetUnfolderBase]: For 310400/312065 co-relation queries the response was YES. [2023-11-26 10:43:20,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117683 conditions, 14480 events. 8686/14480 cut-off events. For 310400/312065 co-relation queries the response was YES. Maximal size of possible extension queue 1017. Compared 110449 event pairs, 641 based on Foata normal form. 438/14526 useless extension candidates. Maximal degree in co-relation 112114. Up to 7322 conditions per place. [2023-11-26 10:43:20,874 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 286 selfloop transitions, 347 changer transitions 4/788 dead transitions. [2023-11-26 10:43:20,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 788 transitions, 17637 flow [2023-11-26 10:43:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:43:20,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-26 10:43:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2023-11-26 10:43:20,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7088235294117647 [2023-11-26 10:43:20,883 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 241 transitions. [2023-11-26 10:43:20,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 241 transitions. [2023-11-26 10:43:20,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-26 10:43:20,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 241 transitions. [2023-11-26 10:43:20,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 24.1) internal successors, (241), 10 states have internal predecessors, (241), 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) [2023-11-26 10:43:20,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 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) [2023-11-26 10:43:20,890 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 34.0) internal successors, (374), 11 states have internal predecessors, (374), 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) [2023-11-26 10:43:20,890 INFO L175 Difference]: Start difference. First operand has 169 places, 408 transitions, 9215 flow. Second operand 10 states and 241 transitions. [2023-11-26 10:43:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 788 transitions, 17637 flow [2023-11-26 10:43:22,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 788 transitions, 16538 flow, removed 414 selfloop flow, removed 14 redundant places. [2023-11-26 10:43:22,380 INFO L231 Difference]: Finished difference. Result has 161 places, 693 transitions, 15671 flow [2023-11-26 10:43:22,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15671, PETRI_PLACES=161, PETRI_TRANSITIONS=693} [2023-11-26 10:43:22,381 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 124 predicate places. [2023-11-26 10:43:22,381 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 693 transitions, 15671 flow [2023-11-26 10:43:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.666666666666668) internal successors, (200), 12 states have internal predecessors, (200), 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) [2023-11-26 10:43:22,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-26 10:43:22,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:43:22,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:43:22,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 10:43:22,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-26 10:43:22,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:43:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash -740507183, now seen corresponding path program 2 times [2023-11-26 10:43:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:43:22,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168610835] [2023-11-26 10:43:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:43:22,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:43:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:43:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:23,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:43:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168610835] [2023-11-26 10:43:23,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168610835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:43:23,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994245205] [2023-11-26 10:43:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:43:23,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:43:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:43:23,038 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:43:23,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3c2a9bb-3e58-479e-947d-9699538a7c0e/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:43:23,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:43:23,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:43:23,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-26 10:43:23,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:43:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:23,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:43:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:43:24,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994245205] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:43:24,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:43:24,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-11-26 10:43:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917560671] [2023-11-26 10:43:24,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:43:24,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-26 10:43:24,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:43:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-26 10:43:24,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-26 10:43:24,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2023-11-26 10:43:24,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 693 transitions, 15671 flow. Second operand has 15 states, 15 states have (on average 14.4) internal successors, (216), 15 states have internal predecessors, (216), 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) [2023-11-26 10:43:24,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-26 10:43:24,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2023-11-26 10:43:24,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand